NICHOLAS BRADFORD CASTNER MD
Prescription History 1992201875
Dermatology in Largo, FL
What does Dr. Castner prescribe?
In 2024, Dr. Castner wrote 109 Medicare prescriptions for 3 medications. The most prescribed was Doxycycline Hyclate, with 49 prescriptions for 47 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. Castner prescribes.
Medications 3 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 Florida prescribers.
What it is used for
This medication is used to treat a wide variety of bacterial infections, including those that cause acne.
Compared with Florida prescribers
Dr. Castner wrote 49 prescriptions for Doxycycline Hyclate, about 1.3 times as often as the typical Florida prescriber of it (37). Medicare paid $7.50 per fill, versus $11.74 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 wide variety of bacterial infections.
Compared with Florida prescribers
Dr. Castner wrote 46 prescriptions for Cephalexin, about 1.4 times as often as the typical Florida prescriber of it (33). Medicare paid $11.52 per fill, versus $7.95 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 used on the skin to treat pre-cancerous and cancerous skin growths.
Compared with Florida prescribers
Dr. Castner wrote 14 prescriptions for Fluorouracil, about 33% as often as the typical Florida prescriber of it (42). Medicare paid $67.04 per fill, versus $69.09 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. Castner’s prescriptions
What does Dr. Castner prescribe most?
In 2024 Medicare Part D data, Dr. Castner's most prescribed medications were Doxycycline Hyclate (49), Cephalexin (46) and Fluorouracil (14).
How does Dr. Castner's prescribing compare with other Florida prescribers?
Of the 3 medications with a state comparison, Dr. Castner prescribes 2 more often than the typical Florida prescriber and 1 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Castner 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 Florida 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.
