DR. WILLIAM TALBERT CHAPMAN M.D.
Prescription History 1164558920
Specialist in National City, CA

NPI Status: Active since February 26, 2007

Contact Information

2340 E 8TH ST
SUITE G
NATIONAL CITY, CA
ZIP 91950
Phone: (619) 475-3870
Fax: (619) 475-6402

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Prescription History for Informed Healthcare Decisions

Explore the verified Medicare Part D prescription history, volume metrics, and calculated drug costs for DR. WILLIAM TALBERT CHAPMAN M.D., an active Specialist specialist practicing in National City, CA. Our medical registry currently tracks 23 unique pharmaceutical formulations prescribed by this provider, representing an estimated volume of 778 documented patient claims. Among these therapy options, the most frequently utilized medication is Gabapentin, which accounts for 86 claims alone.


Aimovig Autoinjector

Generic Formulation: Erenumab-AooeSpecialty: Neurology
Provider Metrics Summary
Total Claims 16
30-Day Fills 16.0
Days Supply 460
CA State Average Benchmarks
Peer Average Claims27.0
Peer Average 30-Day Fills34.7
Peer Average Days Supply1,030
Conservative Utilization

This provider writes prescriptions for this formulation 40.7% less frequently than the standard regional baseline metric for practitioners inside CA. Gross expenditures recorded under Medicare program tracking definitions for this provider calculate to an estimated aggregate of $12,386.74 across this reporting matrix range.

Provider Avg Cost Per Claim

$774.17

State Avg Cost Per Claim

$956.71

Note on Expenses: These indicators represent gross infrastructure resource tracking paid directly to supply pharmacy networks by Medicare Part D configurations. These calculations do not track individual patient insurance tier copays or out-of-pocket shelf prices at retail checkout lanes.

Therapeutic Applications

This medication is used to help prevent migraine. This medication may work by changing the amounts of certain natural substances in the brain. Erenumab belongs to a class of drugs known as monoclonal antibodies. Preventing frequent migraine attacks can help improve your ability to concentrate and do your usual tasks.

Amantadine

Generic Formulation: Amantadine HclSpecialty: Neurology
Provider Metrics Summary
Total Claims 19
30-Day Fills 33.0
Days Supply 990
CA State Average Benchmarks
Peer Average Claims28.0
Peer Average 30-Day Fills45.3
Peer Average Days Supply1,283
Conservative Utilization

This provider writes prescriptions for this formulation 32.1% less frequently than the standard regional baseline metric for practitioners inside CA. Gross expenditures recorded under Medicare program tracking definitions for this provider calculate to an estimated aggregate of $2,359.91 across this reporting matrix range.

Provider Avg Cost Per Claim

$124.21

State Avg Cost Per Claim

$69.22

Note on Expenses: These indicators represent gross infrastructure resource tracking paid directly to supply pharmacy networks by Medicare Part D configurations. These calculations do not track individual patient insurance tier copays or out-of-pocket shelf prices at retail checkout lanes.

Clinical Summary

An antiviral that is used in the prophylactic or symptomatic treatment of influenza A. It is also used as an antiparkinsonian agent, to treat extrapyramidal reactions, and for postherpetic neuralgia. The mechanisms of its effects in movement disorders are not well understood but probably reflect an increase in synthesis and release of dopamine, with perhaps some inhibition of dopamine uptake.

Therapeutic Applications

Amantadine is used to treat Parkinson's disease, as well as side effects caused by drugs (such as drug-induced extrapyramidal symptoms), chemicals, and other medical conditions. In these cases, this medication may help to improve your range of motion and ability to exercise. For the treatment of these conditions, amantadine is believed to work by restoring the balance of natural chemicals (neurotransmitters) in the brain. Amantadine is used to prevent or treat a certain type of flu (influenza A). If you have been infected with the flu, this medication may help make your symptoms less severe and shorten the time it will take you to get better. Taking amantadine if you have been or will be exposed to the flu may help to prevent you from getting the flu. This medication is an antiviral that is believed to work by stopping growth of the flu virus. This medication is not a vaccine. To increase the chance that you will not get the flu, it is important to get a flu shot once a year at the beginning of every flu season, if possible. Based on the recommendation from the Centers for Disease Control (CDC) in the US, amantadine should not be used to treat or prevent influenza A because the current influenza A virus in the United States and Canada is resistant to this medication. For more details, talk to your doctor or pharmacist.

Carbamazepine

Generic Formulation: CarbamazepineSpecialty: Neurology
Provider Metrics Summary
Total Claims 14
30-Day Fills 32.0
Days Supply 960
CA State Average Benchmarks
Peer Average Claims24.0
Peer Average 30-Day Fills33.8
Peer Average Days Supply946
Conservative Utilization

This provider writes prescriptions for this formulation 41.7% less frequently than the standard regional baseline metric for practitioners inside CA. Gross expenditures recorded under Medicare program tracking definitions for this provider calculate to an estimated aggregate of $1,670.88 across this reporting matrix range.

Provider Avg Cost Per Claim

$119.35

State Avg Cost Per Claim

$70.59

Note on Expenses: These indicators represent gross infrastructure resource tracking paid directly to supply pharmacy networks by Medicare Part D configurations. These calculations do not track individual patient insurance tier copays or out-of-pocket shelf prices at retail checkout lanes.

Clinical Summary

A dibenzazepine that acts as a sodium channel blocker. It is used as an anticonvulsant for the treatment of grand mal and psychomotor or focal SEIZURES. It may also be used in the management of BIPOLAR DISORDER, and has analgesic properties.

Therapeutic Applications

Carbamazepine is used to prevent and control seizures. This medication is known as an anticonvulsant or anti-epileptic drug. It is also used to relieve certain types of nerve pain (such as trigeminal neuralgia). This medication works by reducing the spread of seizure activity in the brain and restoring the normal balance of nerve activity.

Carbidopa-Levodopa

Generic Formulation: Carbidopa/LevodopaSpecialty: Neurology
Provider Metrics Summary
Total Claims 26
30-Day Fills 46.0
Days Supply 1,355
CA State Average Benchmarks
Peer Average Claims63.0
Peer Average 30-Day Fills118.3
Peer Average Days Supply3,428
Highly Conservative Utilization

This provider demonstrates a highly selective approach to this formula, recording 58.7% less volume than the regional standard for practitioners inside CA. Gross expenditures recorded under Medicare program tracking definitions for this provider calculate to an estimated aggregate of $1,136.02 across this reporting matrix range.

Provider Avg Cost Per Claim

$43.69

State Avg Cost Per Claim

$51.33

Note on Expenses: These indicators represent gross infrastructure resource tracking paid directly to supply pharmacy networks by Medicare Part D configurations. These calculations do not track individual patient insurance tier copays or out-of-pocket shelf prices at retail checkout lanes.

Therapeutic Applications

This combination medication is used to treat symptoms of Parkinson's disease or Parkinson-like symptoms (such as shakiness, stiffness, difficulty moving). Parkinson's disease is thought to be caused by too little of a naturally occurring substance (dopamine) in the brain. Levodopa changes into dopamine in the brain, helping to control movement. Carbidopa prevents the breakdown of levodopa in the bloodstream so more levodopa can enter the brain. Carbidopa can also reduce some of levodopa's side effects such as nausea and vomiting.

Carbidopa-Levodopa Er

Generic Formulation: Carbidopa/LevodopaSpecialty: Neurology
Provider Metrics Summary
Total Claims 17
30-Day Fills 35.0
Days Supply 1,050
CA State Average Benchmarks
Peer Average Claims41.0
Peer Average 30-Day Fills88.0
Peer Average Days Supply2,598
Highly Conservative Utilization

This provider demonstrates a highly selective approach to this formula, recording 58.5% less volume than the regional standard for practitioners inside CA. Gross expenditures recorded under Medicare program tracking definitions for this provider calculate to an estimated aggregate of $2,992.06 across this reporting matrix range.

Provider Avg Cost Per Claim

$176.00

State Avg Cost Per Claim

$80.59

Note on Expenses: These indicators represent gross infrastructure resource tracking paid directly to supply pharmacy networks by Medicare Part D configurations. These calculations do not track individual patient insurance tier copays or out-of-pocket shelf prices at retail checkout lanes.

Therapeutic Applications

This combination medication is used to treat symptoms of Parkinson's disease or Parkinson-like symptoms (such as shakiness, stiffness, difficulty moving). Parkinson's disease is thought to be caused by too little of a naturally occurring substance (dopamine) in the brain. Levodopa changes into dopamine in the brain, helping to control movement. Carbidopa prevents the breakdown of levodopa in the bloodstream so more levodopa can enter the brain. Carbidopa can also reduce some of levodopa's side effects such as nausea and vomiting.

Divalproex Sodium

Generic Formulation: Divalproex SodiumSpecialty: Neurology
Provider Metrics Summary
Total Claims 27
30-Day Fills 64.1
Days Supply 1,920
CA State Average Benchmarks
Peer Average Claims46.0
Peer Average 30-Day Fills56.1
Peer Average Days Supply1,480
Conservative Utilization

This provider writes prescriptions for this formulation 41.3% less frequently than the standard regional baseline metric for practitioners inside CA. Gross expenditures recorded under Medicare program tracking definitions for this provider calculate to an estimated aggregate of $4,049.17 across this reporting matrix range.

Provider Avg Cost Per Claim

$149.97

State Avg Cost Per Claim

$45.51

Note on Expenses: These indicators represent gross infrastructure resource tracking paid directly to supply pharmacy networks by Medicare Part D configurations. These calculations do not track individual patient insurance tier copays or out-of-pocket shelf prices at retail checkout lanes.

Clinical Summary

A fatty acid with anticonvulsant and anti-manic properties that is used in the treatment of EPILEPSY and BIPOLAR DISORDER. The mechanisms of its therapeutic actions are not well understood. It may act by increasing GAMMA-AMINOBUTYRIC ACID levels in the brain or by altering the properties of VOLTAGE-GATED SODIUM CHANNELS.

Therapeutic Applications

This medication is used to treat seizure disorders, certain psychiatric conditions (manic phase of bipolar disorder), and to prevent migraine headaches. It works by restoring the balance of certain natural substances (neurotransmitters) in the brain.

Donepezil Hcl

Generic Formulation: Donepezil HclSpecialty: Neurology
Provider Metrics Summary
Total Claims 84
30-Day Fills 150.0
Days Supply 4,500
CA State Average Benchmarks
Peer Average Claims55.0
Peer Average 30-Day Fills99.2
Peer Average Days Supply2,878
Highly Elevated Utilization

This provider exhibits a high preference for this treatment path, registering a volume 52.7% higher than the standard regional baseline profile for CA. Gross expenditures recorded under Medicare program tracking definitions for this provider calculate to an estimated aggregate of $1,952.71 across this reporting matrix range.

Provider Avg Cost Per Claim

$23.25

State Avg Cost Per Claim

$17.54

Note on Expenses: These indicators represent gross infrastructure resource tracking paid directly to supply pharmacy networks by Medicare Part D configurations. These calculations do not track individual patient insurance tier copays or out-of-pocket shelf prices at retail checkout lanes.

Therapeutic Applications

Donepezil is used to treat confusion (dementia) related to Alzheimer's disease. It does not cure Alzheimer's disease, but it may improve memory, awareness, and the ability to function. This medication is an enzyme blocker that works by restoring the balance of natural substances (neurotransmitters) in the brain.

Gabapentin

Generic Formulation: GabapentinSpecialty: Neurology
Provider Metrics Summary
Total Claims 86
30-Day Fills 96.0
Days Supply 2,825
CA State Average Benchmarks
Peer Average Claims81.0
Peer Average 30-Day Fills134.7
Peer Average Days Supply3,929
Standard Average Utilization

This provider's prescribing patterns for this therapeutic formulation sit directly in line with standard baseline averages across CA. Gross expenditures recorded under Medicare program tracking definitions for this provider calculate to an estimated aggregate of $1,944.93 across this reporting matrix range.

Provider Avg Cost Per Claim

$22.62

State Avg Cost Per Claim

$21.28

Note on Expenses: These indicators represent gross infrastructure resource tracking paid directly to supply pharmacy networks by Medicare Part D configurations. These calculations do not track individual patient insurance tier copays or out-of-pocket shelf prices at retail checkout lanes.

Clinical Summary

A cyclohexane-gamma-aminobutyric acid derivative that is used for the treatment of PARTIAL SEIZURES; NEURALGIA; and RESTLESS LEGS SYNDROME.

Therapeutic Applications

Gabapentin is used with other medications to prevent and control seizures. It is also used to relieve nerve pain following shingles (a painful rash due to herpes zoster infection) in adults. Gabapentin is known as an anticonvulsant or antiepileptic drug.

Lacosamide

Generic Formulation: LacosamideSpecialty: Neurology
Provider Metrics Summary
Total Claims 36
30-Day Fills 36.0
Days Supply 1,080
CA State Average Benchmarks
Peer Average Claims29.0
Peer Average 30-Day Fills37.0
Peer Average Days Supply1,038
Standard Average Utilization

This provider's prescribing patterns for this therapeutic formulation sit directly in line with standard baseline averages across CA. Gross expenditures recorded under Medicare program tracking definitions for this provider calculate to an estimated aggregate of $8,203.97 across this reporting matrix range.

Provider Avg Cost Per Claim

$227.89

State Avg Cost Per Claim

$321.59

Note on Expenses: These indicators represent gross infrastructure resource tracking paid directly to supply pharmacy networks by Medicare Part D configurations. These calculations do not track individual patient insurance tier copays or out-of-pocket shelf prices at retail checkout lanes.

Clinical Summary

An acetamide derivative that acts as a blocker of VOLTAGE-GATED SODIUM CHANNELS. It is used as an anticonvulsant, for adjunctive or monotherapy, in the treatment of PARTIAL SEIZURES.

Therapeutic Applications

Lacosamide is used to prevent and control seizures. It is an anticonvulsant or antiepileptic drug. It works by reducing the spread of seizure activity in the brain.

Levetiracetam

Generic Formulation: LevetiracetamSpecialty: Neurology
Provider Metrics Summary
Total Claims 73
30-Day Fills 130.6
Days Supply 3,916
CA State Average Benchmarks
Peer Average Claims45.0
Peer Average 30-Day Fills71.3
Peer Average Days Supply2,003
Highly Elevated Utilization

This provider exhibits a high preference for this treatment path, registering a volume 62.2% higher than the standard regional baseline profile for CA. Gross expenditures recorded under Medicare program tracking definitions for this provider calculate to an estimated aggregate of $3,754.39 across this reporting matrix range.

Provider Avg Cost Per Claim

$51.43

State Avg Cost Per Claim

$46.71

Note on Expenses: These indicators represent gross infrastructure resource tracking paid directly to supply pharmacy networks by Medicare Part D configurations. These calculations do not track individual patient insurance tier copays or out-of-pocket shelf prices at retail checkout lanes.

Clinical Summary

A pyrrolidinone and acetamide derivative that is used primarily for the treatment of SEIZURES and some movement disorders, and as a nootropic agent.

Therapeutic Applications

Levetiracetam is used to treat seizures (epilepsy). It belongs to a class of drugs known as anticonvulsants. Levetiracetam may decrease the number of seizures you have.

Memantine Hcl

Generic Formulation: Memantine HclSpecialty: Neurology
Provider Metrics Summary
Total Claims 75
30-Day Fills 111.0
Days Supply 3,323
CA State Average Benchmarks
Peer Average Claims51.0
Peer Average 30-Day Fills83.0
Peer Average Days Supply2,367
Elevated Utilization

This provider maintains an active emphasis on this therapeutic option, recording 47.1% more claims than the standard regional baseline profile for CA. Gross expenditures recorded under Medicare program tracking definitions for this provider calculate to an estimated aggregate of $5,537.80 across this reporting matrix range.

Provider Avg Cost Per Claim

$73.84

State Avg Cost Per Claim

$56.42

Note on Expenses: These indicators represent gross infrastructure resource tracking paid directly to supply pharmacy networks by Medicare Part D configurations. These calculations do not track individual patient insurance tier copays or out-of-pocket shelf prices at retail checkout lanes.

Therapeutic Applications

Memantine is used to treat moderate to severe confusion (dementia) related to Alzheimer's disease. It does not cure Alzheimer's disease, but it may improve memory, awareness, and the ability to perform daily functions. This medication works by blocking the action of a certain natural substance in the brain (glutamate) that is believed to be linked to symptoms of Alzheimer's disease.

Oxcarbazepine

Generic Formulation: OxcarbazepineSpecialty: Neurology
Provider Metrics Summary
Total Claims 35
30-Day Fills 57.0
Days Supply 1,695
CA State Average Benchmarks
Peer Average Claims27.0
Peer Average 30-Day Fills37.4
Peer Average Days Supply1,058
Elevated Utilization

This provider maintains an active emphasis on this therapeutic option, recording 29.6% more claims than the standard regional baseline profile for CA. Gross expenditures recorded under Medicare program tracking definitions for this provider calculate to an estimated aggregate of $2,176.83 across this reporting matrix range.

Provider Avg Cost Per Claim

$62.20

State Avg Cost Per Claim

$65.52

Note on Expenses: These indicators represent gross infrastructure resource tracking paid directly to supply pharmacy networks by Medicare Part D configurations. These calculations do not track individual patient insurance tier copays or out-of-pocket shelf prices at retail checkout lanes.

Clinical Summary

A carbamazepine derivative that acts as a voltage-gated sodium channel blocker. It is used for the treatment of PARTIAL SEIZURES with or without secondary generalization. It is also an inducer of CYTOCHROME P-450 CYP3A4.

Therapeutic Applications

Oxcarbazepine is used alone or with other medications to treat seizure disorders (epilepsy).

Phenytoin Sodium Extended

Generic Formulation: Phenytoin Sodium ExtendedSpecialty: Neurology
Provider Metrics Summary
Total Claims 21
30-Day Fills 27.0
Days Supply 810
CA State Average Benchmarks
Peer Average Claims22.0
Peer Average 30-Day Fills34.9
Peer Average Days Supply973
Standard Average Utilization

This provider's prescribing patterns for this therapeutic formulation sit directly in line with standard baseline averages across CA. Gross expenditures recorded under Medicare program tracking definitions for this provider calculate to an estimated aggregate of $1,132.93 across this reporting matrix range.

Provider Avg Cost Per Claim

$53.95

State Avg Cost Per Claim

$39.59

Note on Expenses: These indicators represent gross infrastructure resource tracking paid directly to supply pharmacy networks by Medicare Part D configurations. These calculations do not track individual patient insurance tier copays or out-of-pocket shelf prices at retail checkout lanes.

Therapeutic Applications

Phenytoin is used to prevent and control seizures (also called an anticonvulsant or antiepileptic drug). It works by reducing the spread of seizure activity in the brain.

Pramipexole Dihydrochloride

Generic Formulation: Pramipexole Di-HclSpecialty: Neurology
Provider Metrics Summary
Total Claims 24
30-Day Fills 50.0
Days Supply 1,500
CA State Average Benchmarks
Peer Average Claims25.0
Peer Average 30-Day Fills46.9
Peer Average Days Supply1,376
Standard Average Utilization

This provider's prescribing patterns for this therapeutic formulation sit directly in line with standard baseline averages across CA. Gross expenditures recorded under Medicare program tracking definitions for this provider calculate to an estimated aggregate of $1,088.29 across this reporting matrix range.

Provider Avg Cost Per Claim

$45.35

State Avg Cost Per Claim

$22.31

Note on Expenses: These indicators represent gross infrastructure resource tracking paid directly to supply pharmacy networks by Medicare Part D configurations. These calculations do not track individual patient insurance tier copays or out-of-pocket shelf prices at retail checkout lanes.

Therapeutic Applications

Pramipexole is used alone or with other medications to treat Parkinson's disease. It can improve your ability to move and can decrease shakiness (tremor), stiffness, slowed movement, and unsteadiness. It may also decrease the number of episodes of not being able to move (on-off syndrome). Pramipexole is a dopamine agonist that works by helping to restore the balance of a certain natural substance (dopamine) in the brain.

Primidone

Generic Formulation: PrimidoneSpecialty: Neurology
Provider Metrics Summary
Total Claims 38
30-Day Fills 52.0
Days Supply 1,560
CA State Average Benchmarks
Peer Average Claims31.0
Peer Average 30-Day Fills55.0
Peer Average Days Supply1,608
Standard Average Utilization

This provider's prescribing patterns for this therapeutic formulation sit directly in line with standard baseline averages across CA. Gross expenditures recorded under Medicare program tracking definitions for this provider calculate to an estimated aggregate of $617.74 across this reporting matrix range.

Provider Avg Cost Per Claim

$16.26

State Avg Cost Per Claim

$28.98

Note on Expenses: These indicators represent gross infrastructure resource tracking paid directly to supply pharmacy networks by Medicare Part D configurations. These calculations do not track individual patient insurance tier copays or out-of-pocket shelf prices at retail checkout lanes.

Clinical Summary

A barbiturate derivative that acts as a GABA modulator and anti-epileptic agent. It is partly metabolized to PHENOBARBITAL in the body and owes some of its actions to this metabolite.

Therapeutic Applications

This medication is used alone or with other medications to control seizures. Controlling and reducing seizures lets you do more of your normal daily activities, reduces your risk of harm when you lose consciousness, and lessens your risk for a possibly life-threatening condition of frequent, repeated seizures. Primidone belongs to a class of drugs known as barbiturate anticonvulsants. It works by controlling the abnormal electrical activity in the brain that occurs during a seizure.

Promethazine Hcl

Generic Formulation: Promethazine HclSpecialty: Neurology
Provider Metrics Summary
Total Claims 11
30-Day Fills 11.0
Days Supply 218
CA State Average Benchmarks
Peer Average Claims22.0
Peer Average 30-Day Fills23.5
Peer Average Days Supply367
Conservative Utilization

This provider writes prescriptions for this formulation 50.0% less frequently than the standard regional baseline metric for practitioners inside CA. Gross expenditures recorded under Medicare program tracking definitions for this provider calculate to an estimated aggregate of $346.21 across this reporting matrix range.

Provider Avg Cost Per Claim

$31.47

State Avg Cost Per Claim

$16.07

Note on Expenses: These indicators represent gross infrastructure resource tracking paid directly to supply pharmacy networks by Medicare Part D configurations. These calculations do not track individual patient insurance tier copays or out-of-pocket shelf prices at retail checkout lanes.

Therapeutic Applications

See also Warning section. Promethazine is used to prevent and treat nausea and vomiting related to certain conditions (such as motion sickness, or before/after surgery). It is also used to treat allergy symptoms such as rash, itching, and runny nose. It may be used to help you feel sleepy/relaxed before and after surgery or to help certain opioid pain relievers (such as meperidine) work better. The suppository form is used when medications cannot be taken by mouth. Promethazine is an antihistamine and works by blocking a certain natural substance (histamine) that your body makes during an allergic reaction. Its other effects (such as anti-nausea, calming, pain relief) may work by affecting other natural substances (such as acetylcholine) and by acting directly on certain parts of the brain.

Propranolol Hcl

Generic Formulation: Propranolol HclSpecialty: Neurology
Provider Metrics Summary
Total Claims 48
30-Day Fills 58.0
Days Supply 1,725
CA State Average Benchmarks
Peer Average Claims25.0
Peer Average 30-Day Fills45.8
Peer Average Days Supply1,338
Highly Elevated Utilization

This provider exhibits a high preference for this treatment path, registering a volume 92.0% higher than the standard regional baseline profile for CA. Gross expenditures recorded under Medicare program tracking definitions for this provider calculate to an estimated aggregate of $867.84 across this reporting matrix range.

Provider Avg Cost Per Claim

$18.08

State Avg Cost Per Claim

$25.96

Note on Expenses: These indicators represent gross infrastructure resource tracking paid directly to supply pharmacy networks by Medicare Part D configurations. These calculations do not track individual patient insurance tier copays or out-of-pocket shelf prices at retail checkout lanes.

Therapeutic Applications

This formulation of propranolol is used for infants and children to treat a certain benign tumor (proliferating infantile hemangioma). It helps to shrink the tumor. Propranolol belongs to a class of drugs known as beta blockers.

Quetiapine Fumarate

Generic Formulation: Quetiapine FumarateSpecialty: Neurology
Provider Metrics Summary
Total Claims 29
30-Day Fills 37.0
Days Supply 1,110
CA State Average Benchmarks
Peer Average Claims56.0
Peer Average 30-Day Fills75.8
Peer Average Days Supply2,143
Conservative Utilization

This provider writes prescriptions for this formulation 48.2% less frequently than the standard regional baseline metric for practitioners inside CA. Gross expenditures recorded under Medicare program tracking definitions for this provider calculate to an estimated aggregate of $1,243.92 across this reporting matrix range.

Provider Avg Cost Per Claim

$42.89

State Avg Cost Per Claim

$39.99

Note on Expenses: These indicators represent gross infrastructure resource tracking paid directly to supply pharmacy networks by Medicare Part D configurations. These calculations do not track individual patient insurance tier copays or out-of-pocket shelf prices at retail checkout lanes.

Clinical Summary

A dibenzothiazepine and ANTIPSYCHOTIC AGENT that targets the SEROTONIN 5-HT2 RECEPTOR; HISTAMINE H1 RECEPTOR, adrenergic alpha1 and alpha2 receptors, as well as the DOPAMINE D1 RECEPTOR and DOPAMINE D2 RECEPTOR. It is used in the treatment of SCHIZOPHRENIA; BIPOLAR DISORDER and DEPRESSIVE DISORDER.

Therapeutic Applications

This medication is used to treat certain mental/mood conditions (such as schizophrenia, bipolar disorder, sudden episodes of mania or depression associated with bipolar disorder). Quetiapine is known as an anti-psychotic drug (atypical type). It works by helping to restore the balance of certain natural substances (neurotransmitters) in the brain. This medication can decrease hallucinations and improve your concentration. It helps you to think more clearly and positively about yourself, feel less nervous, and take a more active part in everyday life. It may also improve your mood, sleep, appetite, and energy level. Quetiapine can help prevent severe mood swings or decrease how often mood swings occur.

Rizatriptan

Generic Formulation: Rizatriptan BenzoateSpecialty: Neurology
Provider Metrics Summary
Total Claims 20
30-Day Fills 20.0
Days Supply 585
CA State Average Benchmarks
Peer Average Claims19.0
Peer Average 30-Day Fills21.4
Peer Average Days Supply555
Standard Average Utilization

This provider's prescribing patterns for this therapeutic formulation sit directly in line with standard baseline averages across CA. Gross expenditures recorded under Medicare program tracking definitions for this provider calculate to an estimated aggregate of $310.04 across this reporting matrix range.

Provider Avg Cost Per Claim

$15.50

State Avg Cost Per Claim

$31.46

Note on Expenses: These indicators represent gross infrastructure resource tracking paid directly to supply pharmacy networks by Medicare Part D configurations. These calculations do not track individual patient insurance tier copays or out-of-pocket shelf prices at retail checkout lanes.

Therapeutic Applications

Rizatriptan is used to treat migraines. It helps to relieve headache, pain, and other migraine symptoms (including nausea, vomiting, sensitivity to light/sound). Prompt treatment helps you return to your normal routine and may decrease your need for other pain medications. Rizatriptan belongs to a class of drugs known as triptans. It affects a certain natural substance (serotonin) that causes narrowing of blood vessels in the brain. It may also relieve pain by affecting certain nerves in the brain. Rizatriptan does not prevent future migraines or lessen how often you get migraine attacks.

Selegiline Hcl

Generic Formulation: Selegiline HclSpecialty: Neurology
Provider Metrics Summary
Total Claims 18
30-Day Fills 26.0
Days Supply 772
CA State Average Benchmarks
Peer Average Claims22.0
Peer Average 30-Day Fills44.7
Peer Average Days Supply1,323
Standard Average Utilization

This provider's prescribing patterns for this therapeutic formulation sit directly in line with standard baseline averages across CA. Gross expenditures recorded under Medicare program tracking definitions for this provider calculate to an estimated aggregate of $2,370.28 across this reporting matrix range.

Provider Avg Cost Per Claim

$131.68

State Avg Cost Per Claim

$136.57

Note on Expenses: These indicators represent gross infrastructure resource tracking paid directly to supply pharmacy networks by Medicare Part D configurations. These calculations do not track individual patient insurance tier copays or out-of-pocket shelf prices at retail checkout lanes.

Clinical Summary

A selective, irreversible inhibitor of Type B monoamine oxidase that is used for the treatment of newly diagnosed patients with PARKINSON DISEASE, and for the treatment of depressive disorders. The compound without isomeric designation is Deprenyl.

Therapeutic Applications

This medication is used to treat movement disorders caused by Parkinson's disease. It does not cure Parkinson's disease, but it may improve shakiness (tremor), muscle stiffness, loss of normal movement as your dose of other Parkinson's medication wears off (end-of-dose failure), and sudden switching between normal movement and stiffness (on-off problems). It may improve your range of motion and ability to walk, dress, and exercise. Selegiline is usually used in combination with other medicines (such as levodopa, carbidopa). Selegiline is an enzyme blocker (MAO inhibitor) that works by slowing the breakdown of certain natural substances in the brain (neurotransmitters such as dopamine, norepinephrine, and serotonin).

Sumatriptan Succinate

Generic Formulation: Sumatriptan SuccinateSpecialty: Neurology
Provider Metrics Summary
Total Claims 13
30-Day Fills 13.0
Days Supply 390
CA State Average Benchmarks
Peer Average Claims23.0
Peer Average 30-Day Fills27.0
Peer Average Days Supply730
Conservative Utilization

This provider writes prescriptions for this formulation 43.5% less frequently than the standard regional baseline metric for practitioners inside CA. Gross expenditures recorded under Medicare program tracking definitions for this provider calculate to an estimated aggregate of $172.46 across this reporting matrix range.

Provider Avg Cost Per Claim

$13.27

State Avg Cost Per Claim

$27.83

Note on Expenses: These indicators represent gross infrastructure resource tracking paid directly to supply pharmacy networks by Medicare Part D configurations. These calculations do not track individual patient insurance tier copays or out-of-pocket shelf prices at retail checkout lanes.

Clinical Summary

A serotonin agonist that acts selectively at 5HT1 receptors. It is used in the treatment of MIGRAINE DISORDERS.

Therapeutic Applications

Sumatriptan is used to treat migraines and cluster headaches. It helps to relieve pain and other symptoms of migraines/headaches including sensitivity to light or sound, nausea, and vomiting. Prompt treatment allows you to get back to your normal routine and may decrease your need for other pain medications. It does not prevent future migraines/headaches or reduce how often you may get a headache. Sumatriptan belongs to a group of drugs called triptans. It affects a certain natural chemical (serotonin) that constricts blood vessels in the brain. It may also block other pain pathways in the brain.

Topiramate

Generic Formulation: TopiramateSpecialty: Neurology
Provider Metrics Summary
Total Claims 35
30-Day Fills 61.0
Days Supply 1,830
CA State Average Benchmarks
Peer Average Claims30.0
Peer Average 30-Day Fills49.2
Peer Average Days Supply1,435
Standard Average Utilization

This provider's prescribing patterns for this therapeutic formulation sit directly in line with standard baseline averages across CA. Gross expenditures recorded under Medicare program tracking definitions for this provider calculate to an estimated aggregate of $960.31 across this reporting matrix range.

Provider Avg Cost Per Claim

$27.44

State Avg Cost Per Claim

$19.59

Note on Expenses: These indicators represent gross infrastructure resource tracking paid directly to supply pharmacy networks by Medicare Part D configurations. These calculations do not track individual patient insurance tier copays or out-of-pocket shelf prices at retail checkout lanes.

Clinical Summary

A sulfamate-substituted fructose analog that was originally identified as a hypoglycemic agent. It is used for the treatment of EPILEPSY and MIGRAINE DISORDERS, and may also promote weight loss.

Therapeutic Applications

Topiramate is used alone or with other medications to prevent and control seizures (epilepsy). This medication is also used to prevent migraine headaches and decrease how often you get them. Topiramate will not treat a migraine headache once it occurs. If you get a migraine headache, treat it as directed by your doctor (such as by taking pain medication, lying down in a dark room). Topiramate is known as an anticonvulsant or antiepileptic drug.

Trazodone Hcl

Generic Formulation: Trazodone HclSpecialty: Neurology
Provider Metrics Summary
Total Claims 13
30-Day Fills 27.0
Days Supply 810
CA State Average Benchmarks
Peer Average Claims55.0
Peer Average 30-Day Fills98.2
Peer Average Days Supply2,885
Highly Conservative Utilization

This provider demonstrates a highly selective approach to this formula, recording 76.4% less volume than the regional standard for practitioners inside CA. Gross expenditures recorded under Medicare program tracking definitions for this provider calculate to an estimated aggregate of $293.30 across this reporting matrix range.

Provider Avg Cost Per Claim

$22.56

State Avg Cost Per Claim

$13.84

Note on Expenses: These indicators represent gross infrastructure resource tracking paid directly to supply pharmacy networks by Medicare Part D configurations. These calculations do not track individual patient insurance tier copays or out-of-pocket shelf prices at retail checkout lanes.

Therapeutic Applications

This medication is used to treat depression. It may help to improve your mood, appetite, and energy level as well as decrease anxiety and insomnia related to depression. Trazodone works by helping to restore the balance of a certain natural chemical (serotonin) in the brain.

Dataset Methodology & CMS Source Information

This analytical profile maps public infrastructure records sourced directly from official **Centers for Medicare & Medicaid Services (CMS)** public data releases. The statistics above track documented pharmaceutical treatment trends assigned to beneficiaries specifically under federal public programs. Evaluating the prescriptive footprints of clinical practitioners like DR. WILLIAM TALBERT CHAPMAN M.D. provides transparency into local medical care patterns within National City, CA.

Key Learning Objectives for this Profile:

  • Prescribing Frequencies: Track and evaluate the volume metrics of specific brand-name and generic medical formulas chosen by this provider over time.
  • Clinical Focus Areas: Identify how the provider distributes therapeutic selections across medical care options to gain insight into their true day-to-day **Specialist** practice concentrations.
  • Program Cost Awareness: Review the calculated total systemic drug costs and raw transactional volumes linked to these orders to better anticipate network insurance coverage structures.
  • Patient-Centered Evaluation: Cross-reference localized regional care comparisons to align practitioner habits directly with your proactive health maintenance goals.

Data Scope Exclusion & Limitations: The data elements presented above explicitly reflect prescription orders processed for Medicare beneficiaries during the year 2023. This informational profile does not aggregate prescription data for individuals utilizing private commercial health plans, state Medicaid coverage, or self-pay options. However, because medical decision-making remains highly consistent across clinical settings, this public registry provides a reliable proxy for understanding the general prescribing preferences and pharmaceutical care approach used by this provider.