DR. DEREK MICHAEL PHELPS OD
Prescription History 1316508708
Optometrist in Tempe, AZ
Medicare Part D Prescription History
Explore the verified Medicare Part D prescription history, volume metrics, and calculated drug costs for DR. DEREK MICHAEL PHELPS OD, an active Optometrist specialist practicing in Tempe, AZ. Our medical registry currently tracks 13 unique pharmaceutical formulations prescribed by this provider, representing an estimated volume of 588 documented patient claims. Among these therapy options, the most frequently utilized medication is Prednisolone Acetate, which accounts for 137 claims alone. Use the table below to sort by claims, cost, or utilization compared with the state average; select any medication for its full profile.
| Medication | Prescriptions (2024)Rx (2024) | Avg Cost per FillCost / Fill | Vs. Other AZ PrescribersVs. AZ Avg |
|---|---|---|---|
| Prednisolone Acetate | 137 | $28.70▼ below AZ avg | ≈ Typical |
About Prednisolone Acetate: This medication is used to treat certain eye conditions due to inflammation or injury. Show more ▾ Prednisolone works by relieving symptoms such as swelling, redness, and itching. It belongs to a class of drugs known as corticosteroids. A glucocorticoid with the general properties of the corticosteroids. It is the drug of choice for all conditions in which routine systemic corticosteroid therapy is indicated, except adrenal deficiency states. In 2024, this provider wrote 137 Medicare prescriptions for Prednisolone Acetate, about the same volume as the typical Arizona prescriber of this medication (146.9). Medicare paid an average of $28.70 per fill, versus $38.96 statewide. How often this provider prescribes it This provider's prescribing volume for this medication is in line with the average AZ prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill This provider's average cost per fill is below the AZ average for this medication. 186.6 30-Day Fills standardized to 30-day supplies 4,724 Days of Medication total across all patients in 2024 | |||
| Fluorometholone | 72 | $68.52▼ below AZ avg | ▲ More than typical |
About Fluorometholone: This medication is used to treat certain eye conditions due to inflammation or injury. Show more ▾ Fluorometholone works by relieving symptoms such as swelling, redness, and itching. It belongs to a class of drugs known as corticosteroids. A glucocorticoid employed, usually as eye drops, in the treatment of allergic and inflammatory conditions of the eye. It has also been used topically in the treatment of various skin disorders. (From Martindale, The Extra Pharmacopoeia, 30th ed, p732) In 2024, this provider wrote 72 Medicare prescriptions for Fluorometholone, about 1.6 times the volume of the typical Arizona prescriber of this medication (44). Medicare paid an average of $68.52 per fill, versus $73.79 statewide. How often this provider prescribes it This provider prescribes this medication more often than the average AZ prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill This provider's average cost per fill is below the AZ average for this medication. 188.6 30-Day Fills standardized to 30-day supplies 5,631 Days of Medication total across all patients in 2024 | |||
| ValacyclovirValacyclovir Hcl | 61 | $51.26 | ▲ More than typical |
About Valacyclovir: Valacyclovir is used to treat infections caused by certain types of viruses. Show more ▾ In children, it is used to treat cold sores around the mouth (caused by herpes simplex) and chickenpox (caused by varicella zoster). In adults, it is used to treat shingles (caused by herpes zoster) and cold sores around the mouth. Valacyclovir is also used to treat outbreaks of genital herpes. In people with frequent outbreaks, this medication is used to reduce the number of future episodes. Valacyclovir is an antiviral drug. It stops the growth of certain viruses. However, it is not a cure for these infections. The viruses that cause these infections continue to live in the body even between outbreaks. Valacyclovir decreases the severity and length of these outbreaks. It helps the sores heal faster, keeps new sores from forming, and decreases pain/itching. This medication may also help reduce how long pain remains after the sores heal. A prodrug of acyclovir that is used in the treatment of HERPES ZOSTER and HERPES SIMPLEX VIRUS INFECTION of the skin and mucous membranes, including GENITAL HERPES. In 2024, this provider wrote 61 Medicare prescriptions for Valacyclovir, about 2.7 times the volume of the typical Arizona prescriber of this medication (22.2). Medicare paid an average of $51.26 per fill, versus $37.77 statewide. How often this provider prescribes it This provider prescribes this medication more often than the average AZ prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 98 30-Day Fills standardized to 30-day supplies 2,580 Days of Medication total across all patients in 2024 | |||
| Dorzolamide-TimololDorzolamide Hcl/Timolol Maleat | 47 | $21.49 | ▼ Less than typical |
About Dorzolamide-Timolol: This product contains two drugs used to treat high pressure inside the eye due to glaucoma (open angle-type) or other eye diseases (such as ocular hypertension). Show more ▾ Lowering high pressure inside the eye helps to prevent blindness. This medication works by decreasing the amount of fluid within the eye. Timolol belongs to a class of drugs known as beta-blockers, and dorzolamide belongs to a class of drugs known as carbonic anhydrase inhibitors. In 2024, this provider wrote 47 Medicare prescriptions for Dorzolamide-Timolol, about half the volume of the typical Arizona prescriber of this medication (92.3). Medicare paid an average of $21.49 per fill, versus $17.84 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average AZ prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 112.8 30-Day Fills standardized to 30-day supplies 3,385 Days of Medication total across all patients in 2024 | |||
| Latanoprost | 44 | $20.31 | ▼ Less than typical |
About Latanoprost: Latanoprost is used to treat high pressure inside the eye due to glaucoma (open angle type) or other eye diseases (such as ocular hypertension). Show more ▾ It is similar to a natural chemical in the body (prostaglandin) and works by regulating the flow of fluid within the eye which results in lower pressure. Lowering high pressure inside the eye helps to prevent blindness. A prostaglandin F analog used to treat OCULAR HYPERTENSION in patients with GLAUCOMA. In 2024, this provider wrote 44 Medicare prescriptions for Latanoprost, about a quarter of the volume of the typical Arizona prescriber of this medication (163.8). Medicare paid an average of $20.31 per fill, versus $12.05 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average AZ prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 126.1 30-Day Fills standardized to 30-day supplies 3,784 Days of Medication total across all patients in 2024 | |||
| Timolol Maleate | 42 | $12.16 | ▼ Less than typical |
About Timolol Maleate: This medication is used to treat high pressure inside the eye due to glaucoma (open angle-type) or other eye diseases (such as ocular hypertension). Show more ▾ Lowering high pressure inside the eye helps to prevent blindness. This medication works by decreasing the amount of fluid within the eye. Timolol belongs to a class of drugs known as beta-blockers. A beta-adrenergic antagonist that is similar in action to PROPRANOLOL; the levo-isomer is more active. Timolol has been proposed as an anti-hypertensive, anti-arrhythmic, anti-angina, and anti-glaucoma agent. It is also used in the treatment of MIGRAINE DISORDERS and tremor. In 2024, this provider wrote 42 Medicare prescriptions for Timolol Maleate, about half the volume of the typical Arizona prescriber of this medication (99.4). Medicare paid an average of $12.16 per fill, versus $11.63 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average AZ prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 85.5 30-Day Fills standardized to 30-day supplies 2,530 Days of Medication total across all patients in 2024 | |||
| RestasisCyclosporine | 37 | $710.93▼ below AZ avg | ≈ Typical |
About Restasis: Cyclosporine eye drops are used to treat a certain type of dry eyes. Show more ▾ They work by increasing the amount of tears you make. A cyclic undecapeptide from an extract of soil fungi. It is a powerful immunosupressant with a specific action on T-lymphocytes. It is used for the prophylaxis of graft rejection in organ and tissue transplantation. (From Martindale, The Extra Pharmacopoeia, 30th ed). In 2024, this provider wrote 37 Medicare prescriptions for Restasis, about 87% of the volume of the typical Arizona prescriber of this medication (42.7). Medicare paid an average of $710.93 per fill, versus $1,039.87 statewide. How often this provider prescribes it This provider's prescribing volume for this medication is in line with the average AZ prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill This provider's average cost per fill is below the AZ average for this medication. 51 30-Day Fills standardized to 30-day supplies 1,485 Days of Medication total across all patients in 2024 | |||
| ErythromycinErythromycin Base | 33 | $14.57 | ▼ Less than typical |
About Erythromycin: This medication is used to treat certain eye infections (such as conjunctivitis). Show more ▾ It is also used to prevent certain eye infections in newborns. It belongs to a class of drugs known as macrolide antibiotics. Erythromycin works by stopping the growth of bacteria. This medication treats only bacterial eye infections. It will not work for other types of eye infections. Unnecessary use or misuse of any antibiotic can lead to its decreased effectiveness. A bacteriostatic antibiotic macrolide produced by Streptomyces erythreus. Erythromycin A is considered its major active component. In sensitive organisms, it inhibits protein synthesis by binding to 50S ribosomal subunits. This binding process inhibits peptidyl transferase activity and interferes with translocation of amino acids during translation and assembly of proteins. In 2024, this provider wrote 33 Medicare prescriptions for Erythromycin, about 72% of the volume of the typical Arizona prescriber of this medication (46). Medicare paid an average of $14.57 per fill, versus $13.77 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average AZ prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 33 30-Day Fills standardized to 30-day supplies 289 Days of Medication total across all patients in 2024 | |||
| Polymyxin B Sul-TrimethoprimPolymyxin B Sulf/Trimethoprim | 31 | $6.83▼ below AZ avg | ▲ More than typical |
About Polymyxin B Sul-Trimethoprim: This medication is used to treat bacterial infections (such as blepharitis, conjunctivitis) of the eye. Show more ▾ It contains 2 antibiotics. Polymyxin B works by killing the bacteria. Trimethoprim works by stopping the growth of the bacteria. This medication treats only bacterial eye infections. It will not work for other types of eye infections. Unnecessary use or misuse of any antibiotic can lead to its decreased effectiveness. In 2024, this provider wrote 31 Medicare prescriptions for Polymyxin B Sul-Trimethoprim, about 1.4 times the volume of the typical Arizona prescriber of this medication (22.3). Medicare paid an average of $6.83 per fill, versus $8.42 statewide. How often this provider prescribes it This provider prescribes this medication more often than the average AZ prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill This provider's average cost per fill is below the AZ average for this medication. 56.2 30-Day Fills standardized to 30-day supplies 1,582 Days of Medication total across all patients in 2024 | |||
| MoxifloxacinMoxifloxacin Hcl | 27 | $12.42▼ below AZ avg | ▼ Less than typical |
About Moxifloxacin: This medication is a quinolone antibiotic used for eye infections. Show more ▾ A fluoroquinolone that acts as an inhibitor of DNA TOPOISOMERASE II and is used as a broad-spectrum antibacterial agent. In 2024, this provider wrote 27 Medicare prescriptions for Moxifloxacin, about a third of the volume of the typical Arizona prescriber of this medication (80.4). Medicare paid an average of $12.42 per fill, versus $24.59 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average AZ prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill This provider's average cost per fill is below the AZ average for this medication. 27.3 30-Day Fills standardized to 30-day supplies 507 Days of Medication total across all patients in 2024 | |||
| Doxycycline Hyclate | 24 | $56.94 | ▼ Less than typical |
About Doxycycline Hyclate: This medication is used to treat a wide variety of bacterial infections, including those that cause acne. Show more ▾ This medication is also used to prevent malaria. This medication is known as a tetracycline antibiotic. It works by stopping the growth of bacteria. This antibiotic treats only bacterial infections. It will not work for viral infections (such as common cold, flu). Using any antibiotic when it is not needed can cause it to not work for future infections. A synthetic tetracycline derivative with similar antimicrobial activity. In 2024, this provider wrote 24 Medicare prescriptions for Doxycycline Hyclate, about 75% of the volume of the typical Arizona prescriber of this medication (32.2). Medicare paid an average of $56.94 per fill, versus $13.36 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average AZ prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 45 30-Day Fills standardized to 30-day supplies 1,260 Days of Medication total across all patients in 2024 | |||
| Acyclovir | 17 | $23.47 | ▼ Less than typical |
About Acyclovir: Acyclovir is used to treat infections caused by certain types of viruses. Show more ▾ It treats cold sores around the mouth (caused by herpes simplex), shingles (caused by herpes zoster), and chickenpox. This medication is also used to treat outbreaks of genital herpes. In people with frequent outbreaks, acyclovir is used to help reduce the number of future episodes. Acyclovir is an antiviral drug. However, it is not a cure for these infections. The viruses that cause these infections continue to live in the body even between outbreaks. Acyclovir decreases the severity and length of these outbreaks. It helps the sores heal faster, keeps new sores from forming, and decreases pain/itching. This medication may also help reduce how long pain remains after the sores heal. In addition, in people with a weakened immune system, acyclovir can decrease the risk of the virus spreading to other parts of the body and causing serious infections. A GUANOSINE analog that acts as an antimetabolite. Viruses are especially susceptible. Used especially against herpes. In 2024, this provider wrote 17 Medicare prescriptions for Acyclovir, about 65% of the volume of the typical Arizona prescriber of this medication (26.3). Medicare paid an average of $23.47 per fill, versus $14.13 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average AZ prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 43 30-Day Fills standardized to 30-day supplies 1,267 Days of Medication total across all patients in 2024 | |||
| Ketorolac Tromethamine | 16 | $14.05▼ below AZ avg | ▼ Less than typical |
About Ketorolac Tromethamine: This medication is used to temporarily relieve itching eyes caused by seasonal allergies. Show more ▾ It is also used to prevent and treat eye swelling due to a certain type of eye surgery (cataract removal). Ketorolac belongs to a class of drugs known as nonsteroidal anti-inflammatory drugs (NSAIDs). It works by blocking certain natural substances in your body to reduce pain and swelling. A pyrrolizine carboxylic acid derivative structurally related to INDOMETHACIN. It is a non-steroidal anti-inflammatory agent used for analgesia for postoperative pain and inhibits cyclooxygenase activity. In 2024, this provider wrote 16 Medicare prescriptions for Ketorolac Tromethamine, about 18% of the volume of the typical Arizona prescriber of this medication (86.9). Medicare paid an average of $14.05 per fill, versus $23.58 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average AZ prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill This provider's average cost per fill is below the AZ average for this medication. 16 30-Day Fills standardized to 30-day supplies 374 Days of Medication total across all patients in 2024 | |||
About this data. The prescription history for DR. DEREK MICHAEL PHELPS OD is compiled from the Centers for Medicare & Medicaid Services (CMS) Medicare Part D Prescriber Public Use File for calendar year 2024, the most recent federal release. Figures cover prescriptions filled for Medicare Part D beneficiaries only; prescriptions under private insurance, Medicaid, or self-pay plans are not included. Because prescribing decisions are generally consistent across coverage types, this record offers a useful view of the overall Optometrist prescribing approach at this Tempe, AZ practice.
Reading the costs. Drug costs are gross amounts paid to pharmacies under Part D, including both plan and beneficiary payments. They are not the price a patient pays at the pharmacy counter. Medications with fewer than 11 claims are excluded from the federal source data, and state comparisons use the average among AZ prescribers of the same medication and form, shown only when at least five prescribers contribute. Always confirm current medications and costs directly with the provider and your plan.
About the medication summaries. Drug use descriptions come from the CMS Medicare Part D Drug Spending Dashboard (2024), and substance definitions from Medical Subject Headings (MeSH) 2026, U.S. National Library of Medicine. They are summaries that do not contain all possible information about a medication and are not individual medical advice. Ask a health care professional about any medication and your specific health needs.
