HOLLY KNIGHT MCCARTHY O.D.
Prescription History 1952718413
Optometrist in Portland, ME
What does Dr. Mccarthy prescribe?
In 2024, Dr. Mccarthy wrote 94 Medicare prescriptions for 4 medications. The most prescribed was Erythromycin (erythromycin base), with 38 prescriptions for 34 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. Mccarthy prescribes.
Medications 4 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 Maine prescribers.
What it is used for
This medication is used to treat certain eye infections (such as conjunctivitis).
Compared with Maine prescribers
Dr. Mccarthy wrote 38 prescriptions for Erythromycin, about 1.2 times as often as the typical Maine prescriber of it (32). Medicare paid $7.82 per fill, versus $19.99 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
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 Maine prescribers
Dr. Mccarthy wrote 32 prescriptions for Latanoprost, about 31% as often as the typical Maine prescriber of it (105). Medicare paid $10.41 per fill, versus $14.15 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 conditions involving swelling (inflammation) of the eyes and to treat or prevent bacterial eye infections.
Compared with Maine prescribers
Dr. Mccarthy wrote 13 prescriptions for Neomycin-Polymyxin-Dexameth, about 27% as often as the typical Maine prescriber of it (49). Medicare paid $9.19 per fill, versus $9.91 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
Cyclosporine eye drops are used to treat a certain type of dry eyes.
Compared with Maine prescribers
Dr. Mccarthy wrote 11 prescriptions for Restasis, about 34% as often as the typical Maine prescriber of it (32). Medicare paid $1,216.13 per fill, versus $1,286.41 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. Mccarthy’s prescriptions
What does Dr. Mccarthy prescribe most?
In 2024 Medicare Part D data, Dr. Mccarthy's most prescribed medications were Erythromycin (38), Latanoprost (32) and Neomycin-Polymyxin-Dexameth (13).
How does Dr. Mccarthy's prescribing compare with other Maine prescribers?
Of the 4 medications with a state comparison, Dr. Mccarthy prescribes 1 about as often than the typical Maine prescriber and 3 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Mccarthy 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 Maine 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.
