DR. DARBY ANNETTE CLAYSON MD
Prescription History 1619968021
Internal Medicine in San Francisco, CA
What does Dr. Clayson prescribe?
In 2024, Dr. Clayson wrote 2,892 Medicare prescriptions for 74 medications. The most prescribed was Atorvastatin Calcium, with 253 prescriptions for 59 patients.
Medicare Part D only. These are prescriptions filled by people with Medicare drug coverage in 2024, from the CMS data released in 2026, the most recent year available. CMS does not publish medications with fewer than 11 prescriptions, so this is not a full list of what Dr. Clayson prescribes.
Medications 74 medications
Prescriptions filled under Medicare Part D in 2024. Select a medication to see what it is used for and how it compares with other California prescribers.
What it is used for
Atorvastatin is used along with a proper diet to help lower "bad" cholesterol and fats (such as LDL, triglycerides) and raise "good" cholesterol (HDL) in the blood.
Compared with California prescribers
Dr. Clayson wrote 253 prescriptions for Atorvastatin Calcium, about 1.2 times as often as the typical California prescriber of it (202). Medicare paid $18.45 per fill, versus $10.47 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Amlodipine is used with or without other medications to treat high blood pressure.
Compared with California prescribers
Dr. Clayson wrote 216 prescriptions for Amlodipine Besylate, about 1.5 times as often as the typical California prescriber of it (141). Medicare paid $9.25 per fill, versus $7.08 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Apixaban is used to prevent serious blood clots from forming due to a certain irregular heartbeat (atrial fibrillation) or after hip/knee replacement surgery.
Compared with California prescribers
Dr. Clayson wrote 152 prescriptions for Eliquis, about 2.1 times as often as the typical California prescriber of it (73). Medicare paid $317.46 per fill, versus $923.33 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Levothyroxine is used to treat an underactive thyroid (hypothyroidism).
Compared with California prescribers
Dr. Clayson wrote 133 prescriptions for Levothyroxine Sodium, about as often as the typical California prescriber of it (125). Medicare paid $10.40 per fill, versus $13.30 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Furosemide is used to reduce extra fluid in the body (edema) caused by conditions such as heart failure, liver disease, and kidney disease.
Compared with California prescribers
Dr. Clayson wrote 125 prescriptions for Furosemide, about 1.9 times as often as the typical California prescriber of it (64). Medicare paid $4.45 per fill, versus $6.39 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Lisinopril is used to treat high blood pressure.
Compared with California prescribers
Dr. Clayson wrote 111 prescriptions for Lisinopril, about as often as the typical California prescriber of it (98). Medicare paid $16.41 per fill, versus $8.30 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Famotidine is used to treat ulcers of the stomach and intestines and to prevent intestinal ulcers from coming back after they have healed.
Compared with California prescribers
Dr. Clayson wrote 106 prescriptions for Famotidine, about 2 times as often as the typical California prescriber of it (54). Medicare paid $24.92 per fill, versus $12.66 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Gabapentin is used with other medications to prevent and control seizures.
Compared with California prescribers
Dr. Clayson wrote 106 prescriptions for Gabapentin, about 1.3 times as often as the typical California prescriber of it (80). Medicare paid $38.22 per fill, versus $15.63 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Metformin is used with a proper diet and exercise program and possibly with other medications to control high blood sugar.
Compared with California prescribers
Dr. Clayson wrote 94 prescriptions for Metformin Hcl, about as often as the typical California prescriber of it (100). Medicare paid $13.27 per fill, versus $9.26 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Pantoprazole is used to treat certain stomach and esophagus problems (such as acid reflux).
Compared with California prescribers
Dr. Clayson wrote 63 prescriptions for Pantoprazole Sodium, about as often as the typical California prescriber of it (65). Medicare paid $32.07 per fill, versus $13.87 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Empagliflozin is used with a proper diet and exercise program to control high blood sugar in people with type 2 diabetes.
Compared with California prescribers
Dr. Clayson wrote 62 prescriptions for Jardiance, about as often as the typical California prescriber of it (58). Medicare paid $314.22 per fill, versus $933.82 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is a beta-blocker used to treat chest pain (angina), heart failure, and high blood pressure.
Compared with California prescribers
Dr. Clayson wrote 62 prescriptions for Metoprolol Succinate, about 72% as often as the typical California prescriber of it (86). Medicare paid $12.20 per fill, versus $14.23 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Tamsulosin is used by men to treat the symptoms of an enlarged prostate (benign prostatic hyperplasia-BPH).
Compared with California prescribers
Dr. Clayson wrote 57 prescriptions for Tamsulosin Hcl, about 67% as often as the typical California prescriber of it (84). Medicare paid $26.69 per fill, versus $15.02 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Levetiracetam is used to treat seizures (epilepsy).
Compared with California prescribers
Dr. Clayson wrote 53 prescriptions for Levetiracetam, about as often as the typical California prescriber of it (47). Medicare paid $60.05 per fill, versus $37.33 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Glipizide is used with a proper diet and exercise program to control high blood sugar in people with type 2 diabetes.
Compared with California prescribers
Dr. Clayson wrote 50 prescriptions for Glipizide, about as often as the typical California prescriber of it (49). Medicare paid $21.83 per fill, versus $10.86 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This vaccine is used to prevent infection by the respiratory syncytial virus (RSV).
Compared with California prescribers
Dr. Clayson wrote 48 prescriptions for Arexvy, about half as often as the typical California prescriber of it (101). Medicare paid $301.56 per fill, versus $269.05 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Metoprolol is used with or without other medications to treat high blood pressure (hypertension).
Compared with California prescribers
Dr. Clayson wrote 42 prescriptions for Metoprolol Tartrate, about 74% as often as the typical California prescriber of it (57). Medicare paid $8.86 per fill, versus $7.82 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Carvedilol is used to treat high blood pressure and heart failure.
Compared with California prescribers
Dr. Clayson wrote 41 prescriptions for Carvedilol, about 73% as often as the typical California prescriber of it (56). Medicare paid $9.26 per fill, versus $8.98 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Donepezil is used to treat confusion (dementia) related to Alzheimer's disease.
Compared with California prescribers
Dr. Clayson wrote 41 prescriptions for Donepezil Hcl, about 70% as often as the typical California prescriber of it (58). Medicare paid $17.23 per fill, versus $12.53 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Losartan is used to treat high blood pressure (hypertension) and to help protect the kidneys from damage due to diabetes.
Compared with California prescribers
Dr. Clayson wrote 41 prescriptions for Losartan Potassium, about 34% as often as the typical California prescriber of it (121). Medicare paid $11.86 per fill, versus $10.35 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat muscle tightness and cramping (spasms) caused by certain nerve disorders such as spinal cord injury, stroke, cerebral palsy, and multiple sclerosis.
Compared with California prescribers
Dr. Clayson wrote 34 prescriptions for Dantrolene Sodium, about 1.6 times as often as the typical California prescriber of it (22). Medicare paid $27.90 per fill, versus $73.41 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Sitagliptin is used with a proper diet and exercise program and possibly with other medications to control high blood sugar.
Compared with California prescribers
Dr. Clayson wrote 34 prescriptions for Januvia, about 82% as often as the typical California prescriber of it (41). Medicare paid $380.94 per fill, versus $915.30 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat certain mental/mood disorders (such as depression, anxiety).
Compared with California prescribers
Dr. Clayson wrote 33 prescriptions for Duloxetine Hcl, about 82% as often as the typical California prescriber of it (40). Medicare paid $56.26 per fill, versus $24.72 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Clopidogrel is used to prevent heart attacks and strokes in persons with heart disease (recent heart attack), recent stroke, or blood circulation disease (peripheral vascular disease).
Compared with California prescribers
Dr. Clayson wrote 32 prescriptions for Clopidogrel, about 66% as often as the typical California prescriber of it (48). Medicare paid $19.34 per fill, versus $12.42 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Insulin glargine is used with a proper diet and exercise program to control high blood sugar in people with diabetes.
Compared with California prescribers
Dr. Clayson wrote 32 prescriptions for Lantus, about 1.5 times as often as the typical California prescriber of it (22). Medicare paid $71.55 per fill, versus $113.95 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is a mineral supplement used to treat or prevent low amounts of potassium in the blood.
Compared with California prescribers
Dr. Clayson wrote 30 prescriptions for Potassium Chloride, about 63% as often as the typical California prescriber of it (48). Medicare paid $139.16 per fill, versus $24.00 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat the symptoms of Parkinson's disease (such as shakiness, stiffness, difficulty moving) or Parkinson-like conditions.
Compared with California prescribers
Dr. Clayson wrote 30 prescriptions for Rytary, about half as often as the typical California prescriber of it (57). Medicare paid $335.25 per fill, versus $1,313.95 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Allopurinol is used to treat gout and certain types of kidney stones.
Compared with California prescribers
Dr. Clayson wrote 28 prescriptions for Allopurinol, about 63% as often as the typical California prescriber of it (44). Medicare paid $14.71 per fill, versus $10.39 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Baclofen is used to treat muscle spasms caused by certain conditions (such as multiple sclerosis, spinal cord injury/disease).
Compared with California prescribers
Dr. Clayson wrote 28 prescriptions for Baclofen, about 67% as often as the typical California prescriber of it (42). Medicare paid $30.67 per fill, versus $14.75 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Spironolactone is used to treat high blood pressure and heart failure.
Compared with California prescribers
Dr. Clayson wrote 27 prescriptions for Spironolactone, about 72% as often as the typical California prescriber of it (37). Medicare paid $10.22 per fill, versus $10.05 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Methenamine is used to prevent or control returning urinary tract infections caused by certain bacteria.
Compared with California prescribers
Dr. Clayson wrote 26 prescriptions for Methenamine Hippurate, about 72% as often as the typical California prescriber of it (36). Medicare paid $97.88 per fill, versus $75.37 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This product is used to treat certain types of heart failure.
Compared with California prescribers
Dr. Clayson wrote 24 prescriptions for Entresto, about half as often as the typical California prescriber of it (57). Medicare paid $209.27 per fill, versus $1,043.51 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Hydralazine is used with or without other medications to treat high blood pressure.
Compared with California prescribers
Dr. Clayson wrote 23 prescriptions for Hydralazine Hcl, about half as often as the typical California prescriber of it (43). Medicare paid $9.65 per fill, versus $14.35 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat certain bladder problems (overactive bladder, neurogenic detrusor overactivity).
Compared with California prescribers
Dr. Clayson wrote 23 prescriptions for Myrbetriq, about half as often as the typical California prescriber of it (45). Medicare paid $217.30 per fill, versus $698.68 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Insulin lispro is used with a proper diet and exercise program to control high blood sugar in people with diabetes.
Compared with California prescribers
Dr. Clayson wrote 22 prescriptions for Humalog Kwikpen U-100, about 72% as often as the typical California prescriber of it (30). Medicare paid $59.97 per fill, versus $231.67 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Latanoprost is used to treat high pressure inside the eye due to glaucoma (open angle type) or other eye diseases (such as ocular hypertension).
Compared with California prescribers
Dr. Clayson wrote 22 prescriptions for Latanoprost, about 14% as often as the typical California prescriber of it (159). Medicare paid $16.91 per fill, versus $12.02 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used alone or with other medications to prevent nausea and vomiting caused by cancer drug treatment (chemotherapy) and radiation therapy.
Compared with California prescribers
Dr. Clayson wrote 22 prescriptions for Ondansetron Hcl, about 79% as often as the typical California prescriber of it (28). Medicare paid $13.63 per fill, versus $14.67 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
When inhaled by mouth, acetylcysteine is used to help thin and loosen mucus in the airways due to certain lung diseases (such as emphysema, bronchitis, cystic fibrosis, pneumonia).
Compared with California prescribers
Dr. Clayson wrote 21 prescriptions for Acetylcysteine, about as often as the typical California prescriber of it (20). Medicare paid $122.90 per fill, versus $86.12 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This combination medication is used to treat symptoms of Parkinson's disease or Parkinson-like symptoms (such as shakiness, stiffness, difficulty moving).
Compared with California prescribers
Dr. Clayson wrote 21 prescriptions for Carbidopa-Levodopa, about 31% as often as the typical California prescriber of it (68). Medicare paid $62.82 per fill, versus $38.14 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
See also Warning section.
Compared with California prescribers
Dr. Clayson wrote 21 prescriptions for Diclofenac Sodium, about half as often as the typical California prescriber of it (47). Medicare paid $33.87 per fill, versus $107.23 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This product is used to treat and prevent symptoms (wheezing and shortness of breath) caused by ongoing lung disease (chronic obstructive pulmonary disease-COPD which includes bronchitis and emphysema).
Compared with California prescribers
Dr. Clayson wrote 20 prescriptions for Ipratropium-Albuterol, about 38% as often as the typical California prescriber of it (53). Medicare paid $48.66 per fill, versus $31.59 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This combination medication is used to relieve moderate to severe pain.
Compared with California prescribers
Dr. Clayson wrote 19 prescriptions for Hydrocodone-Acetaminophen, about 25% as often as the typical California prescriber of it (76). Medicare paid $13.80 per fill, versus $21.39 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is a laxative used to treat constipation.
Compared with California prescribers
Dr. Clayson wrote 19 prescriptions for Lactulose, about 65% as often as the typical California prescriber of it (29). Medicare paid $42.68 per fill, versus $52.96 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Phenytoin is used to prevent and control seizures (also called an anticonvulsant or antiepileptic drug).
Compared with California prescribers
Dr. Clayson wrote 19 prescriptions for Phenytoin Sodium Extended, about 84% as often as the typical California prescriber of it (23). Medicare paid $43.89 per fill, versus $33.61 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Prednisone is used to treat conditions such as arthritis, blood disorders, breathing problems, severe allergies, skin diseases, cancer, eye problems, and immune system disorders.
Compared with California prescribers
Dr. Clayson wrote 19 prescriptions for Prednisone, about half as often as the typical California prescriber of it (40). Medicare paid $12.43 per fill, versus $5.64 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Rosuvastatin is used along with a proper diet to help lower "bad" cholesterol and fats (such as LDL, triglycerides) and raise "good" cholesterol (HDL) in the blood.
Compared with California prescribers
Dr. Clayson wrote 19 prescriptions for Rosuvastatin Calcium, about 19% as often as the typical California prescriber of it (101). Medicare paid $17.39 per fill, versus $15.64 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Albuterol (also known as salbutamol) is used to prevent and treat wheezing and shortness of breath caused by breathing problems (such as asthma, chronic obstructive pulmonary disease).
Compared with California prescribers
Dr. Clayson wrote 18 prescriptions for Albuterol Sulfate Hfa, about 31% as often as the typical California prescriber of it (58). Medicare paid $51.53 per fill, versus $28.70 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Omeprazole is used to treat certain stomach and esophagus problems (such as acid reflux, ulcers).
Compared with California prescribers
Dr. Clayson wrote 18 prescriptions for Omeprazole, about 23% as often as the typical California prescriber of it (78). Medicare paid $11.26 per fill, versus $11.26 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat depression.
Compared with California prescribers
Dr. Clayson wrote 17 prescriptions for Bupropion Hcl Sr, about 73% as often as the typical California prescriber of it (23). Medicare paid $22.87 per fill, versus $18.90 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This combination of nirmatrelvir and ritonavir is used to treat coronavirus disease (COVID-19) in people who have mild to moderate symptoms and have a high risk for COVID-19 complications.
Compared with California prescribers
Dr. Clayson wrote 17 prescriptions for Paxlovid, about 70% as often as the typical California prescriber of it (24). Medicare paid $0.00 per fill, versus $42.82 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat pain caused by nerve damage due to diabetes, shingles (herpes zoster) infection, or spinal cord injury.
Compared with California prescribers
Dr. Clayson wrote 17 prescriptions for Pregabalin, about half as often as the typical California prescriber of it (39). Medicare paid $97.85 per fill, versus $24.98 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Pyridostigmine is used to improve muscle strength in patients with a certain muscle disease (myasthenia gravis).
Compared with California prescribers
Dr. Clayson wrote 17 prescriptions for Pyridostigmine Bromide, about 72% as often as the typical California prescriber of it (24). Medicare paid $142.88 per fill, versus $82.43 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Rivaroxaban is used to prevent blood clots from forming due to a certain irregular heartbeat (atrial fibrillation) or after hip or knee replacement surgery.
Compared with California prescribers
Dr. Clayson wrote 17 prescriptions for Xarelto, about 40% as often as the typical California prescriber of it (43). Medicare paid $581.32 per fill, versus $952.66 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Megestrol is used to treat loss of appetite and weight loss in people with AIDS.
Compared with California prescribers
Dr. Clayson wrote 16 prescriptions for Megestrol Acetate, about half as often as the typical California prescriber of it (28). Medicare paid $99.39 per fill, versus $57.89 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Topiramate is used alone or with other medications to prevent and control seizures (epilepsy).
Compared with California prescribers
Dr. Clayson wrote 16 prescriptions for Topiramate, about half as often as the typical California prescriber of it (29). Medicare paid $10.84 per fill, versus $13.46 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This combination medication is used to treat symptoms of Parkinson's disease or Parkinson-like symptoms (such as shakiness, stiffness, difficulty moving).
Compared with California prescribers
Dr. Clayson wrote 14 prescriptions for Carbidopa-Levodopa Er, about 30% as often as the typical California prescriber of it (46). Medicare paid $30.26 per fill, versus $57.08 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Nystatin is used to treat fungal skin infections.
Compared with California prescribers
Dr. Clayson wrote 14 prescriptions for Nystop, about 66% as often as the typical California prescriber of it (21). Medicare paid $54.22 per fill, versus $32.86 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Acyclovir is used to treat infections caused by certain types of viruses.
Compared with California prescribers
Dr. Clayson wrote 13 prescriptions for Acyclovir, about half as often as the typical California prescriber of it (25). Medicare paid $19.35 per fill, versus $18.27 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Bumetanide is used to reduce extra fluid in the body (edema) caused by conditions such as heart failure, liver disease, and kidney disease.
Compared with California prescribers
Dr. Clayson wrote 13 prescriptions for Bumetanide, about half as often as the typical California prescriber of it (29). Medicare paid $63.97 per fill, versus $38.82 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat seizure disorders, mental/mood conditions (such as manic phase of bipolar disorder), and to prevent migraine headaches.
Compared with California prescribers
Dr. Clayson wrote 13 prescriptions for Divalproex Sodium Er, about 35% as often as the typical California prescriber of it (37). Medicare paid $215.21 per fill, versus $51.64 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to prevent and treat blood clots.
Compared with California prescribers
Dr. Clayson wrote 13 prescriptions for Heparin Sodium, about half as often as the typical California prescriber of it (28). Medicare paid $31.00 per fill, versus $60.70 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat a variety of skin conditions (such as insect bites, poison oak/ivy, eczema, dermatitis, allergies, rash, itching of the outer female genitals, anal itching).
Compared with California prescribers
Dr. Clayson wrote 13 prescriptions for Hydrocortisone, about half as often as the typical California prescriber of it (29). Medicare paid $48.96 per fill, versus $20.54 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Methimazole is used to treat overactive thyroid (hyperthyroidism).
Compared with California prescribers
Dr. Clayson wrote 13 prescriptions for Methimazole, about 33% as often as the typical California prescriber of it (40). Medicare paid $25.55 per fill, versus $12.61 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This product is used to control and prevent symptoms (such as wheezing and shortness of breath) caused by asthma and ongoing lung disease (chronic obstructive pulmonary disease-COPD, which includes chronic bronchitis and emphysema).
Compared with California prescribers
Dr. Clayson wrote 13 prescriptions for Trelegy Ellipta, about 23% as often as the typical California prescriber of it (57). Medicare paid $543.73 per fill, versus $801.62 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat a variety of skin conditions (such as eczema, dermatitis, allergies, rash).
Compared with California prescribers
Dr. Clayson wrote 13 prescriptions for Triamcinolone Acetonide, about 30% as often as the typical California prescriber of it (43). Medicare paid $10.90 per fill, versus $10.03 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Anastrozole is used to treat breast cancer in women after menopause.
Compared with California prescribers
Dr. Clayson wrote 12 prescriptions for Anastrozole, about 18% as often as the typical California prescriber of it (68). Medicare paid $54.09 per fill, versus $20.79 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Clotrimazole is used to treat skin infections such as athlete's foot, jock itch, ringworm, and other fungal skin infections (candidiasis).
Compared with California prescribers
Dr. Clayson wrote 12 prescriptions for Clotrimazole, about 37% as often as the typical California prescriber of it (33). Medicare paid $30.76 per fill, versus $22.98 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat depression.
Compared with California prescribers
Dr. Clayson wrote 12 prescriptions for Mirtazapine, about 30% as often as the typical California prescriber of it (40). Medicare paid $21.54 per fill, versus $19.05 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Pioglitazone is a diabetes drug (thiazolidinedione-type, also called "glitazones") used along with a proper diet and exercise program to control high blood sugar in patients with type 2 diabetes.
Compared with California prescribers
Dr. Clayson wrote 12 prescriptions for Pioglitazone Hcl, about 29% as often as the typical California prescriber of it (41). Medicare paid $20.31 per fill, versus $13.99 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Calcium acetate is used to prevent high blood phosphate levels in patients who are on dialysis due to severe kidney disease.
Compared with California prescribers
Dr. Clayson wrote 11 prescriptions for Calcium Acetate, about 29% as often as the typical California prescriber of it (38). Medicare paid $49.12 per fill, versus $84.08 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to prevent or treat gout attacks (flares).
Compared with California prescribers
Dr. Clayson wrote 11 prescriptions for Colchicine, about half as often as the typical California prescriber of it (26). Medicare paid $71.47 per fill, versus $45.46 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Insulin lispro is used with a proper diet and exercise program to control high blood sugar in people with diabetes.
Compared with California prescribers
Dr. Clayson wrote 11 prescriptions for Humalog, about 40% as often as the typical California prescriber of it (27). Medicare paid $65.14 per fill, versus $194.90 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to help relieve moderate to severe pain.
Compared with California prescribers
Dr. Clayson wrote 11 prescriptions for Oxycodone Hcl, about 25% as often as the typical California prescriber of it (43). Medicare paid $15.30 per fill, versus $16.05 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Terazosin is used alone or with other drugs to treat high blood pressure (hypertension).
Compared with California prescribers
Dr. Clayson wrote 11 prescriptions for Terazosin Hcl, about 30% as often as the typical California prescriber of it (36). Medicare paid $26.60 per fill, versus $37.76 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
Questions about Dr. Clayson’s prescriptions
What does Dr. Clayson prescribe most?
In 2024 Medicare Part D data, Dr. Clayson's most prescribed medications were Atorvastatin Calcium (253), Amlodipine Besylate (216) and Eliquis (152).
How does Dr. Clayson's prescribing compare with other California prescribers?
Of the 74 medications with a state comparison, Dr. Clayson prescribes 7 more often than the typical California prescriber, 13 about as often and 54 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Clayson prescribes?
No. It covers prescriptions filled by people with Medicare Part D drug coverage in 2024, and CMS leaves out any medication with fewer than 11 prescriptions.
About this data
This page shows one provider’s slice of public Medicare files. NPI Profile does not receive prescriptions or patient records.
| Source | What it provides here | Data year |
|---|---|---|
| CMS Medicare Part D Prescribers by Provider and Drug | Each medication, prescriptions, patients, 30-day fills, days of medication and cost. State comparisons average the California prescribers of the same medication and form, where at least five wrote it. | 2024 (released 2026, the most recent available) |
| CMS Medicare Part D Drug Spending Dashboard | What each medication is used for. | 2024 |
- Only prescriptions filled by people with Medicare Part D drug coverage are counted. Private insurance, Medicaid and cash purchases are not.
- CMS leaves out medications with fewer than 11 prescriptions and hides patient counts under 11.
- Cost per fill is what the plan and the patient paid the pharmacy together, not what you pay at the counter.
- Medication descriptions are summaries from CMS. They are not medical advice; ask a health care professional about any medication.
