MRS. TINA DIANE GERWIN NP-C
Prescription History 1033975784
Nurse Practitioner - Family in Ardmore, OK
What does Tina Gerwin prescribe?
In 2024, Tina Gerwin wrote 244 Medicare prescriptions for 13 medications. The most prescribed was Mirtazapine, with 47 prescriptions.
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 Tina Gerwin prescribes.
Medications 13 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 Oklahoma prescribers.
What it is used for
This medication is used to treat depression.
Compared with Oklahoma prescribers
Tina Gerwin wrote 47 prescriptions for Mirtazapine, about as often as the typical Oklahoma prescriber of it (48). Medicare paid $15.12 per fill, versus $18.91 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
Methenamine is used to prevent or control returning urinary tract infections caused by certain bacteria.
Compared with Oklahoma prescribers
Tina Gerwin wrote 30 prescriptions for Methenamine Hippurate, about 69% as often as the typical Oklahoma prescriber of it (43). Medicare paid $26.83 per fill, versus $59.79 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
Amoxicillin/clavulanic acid is a combination penicillin-type antibiotic used to treat a wide variety of bacterial infections.
Compared with Oklahoma prescribers
Tina Gerwin wrote 20 prescriptions for Amoxicillin-Clavulanate Potass, about 75% as often as the typical Oklahoma prescriber of it (27). Medicare paid $13.66 per fill, versus $11.52 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 Oklahoma prescribers
Tina Gerwin wrote 19 prescriptions for Ondansetron Odt, about 63% as often as the typical Oklahoma prescriber of it (30). Medicare paid $15.87 per fill, versus $17.90 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 a mineral supplement used to treat or prevent low amounts of potassium in the blood.
Compared with Oklahoma prescribers
Tina Gerwin wrote 19 prescriptions for Potassium Chloride, about 21% as often as the typical Oklahoma prescriber of it (89). Medicare paid $13.78 per fill, versus $17.39 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 used to treat a wide variety of bacterial infections, including those that cause acne.
Compared with Oklahoma prescribers
Tina Gerwin wrote 18 prescriptions for Doxycycline Hyclate, about half as often as the typical Oklahoma prescriber of it (32). Medicare paid $11.68 per fill, versus $13.40 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 Oklahoma prescribers
Tina Gerwin wrote 17 prescriptions for Ipratropium-Albuterol, about 31% as often as the typical Oklahoma prescriber of it (55). Medicare paid $16.62 per fill, versus $40.27 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
This medication is used to treat certain mental/mood disorders (such as depression, anxiety).
Compared with Oklahoma prescribers
Tina Gerwin wrote 15 prescriptions for Escitalopram Oxalate, about 25% as often as the typical Oklahoma prescriber of it (60). Medicare paid $5.99 per fill, versus $12.96 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
This medication is an antibiotic used to treat bladder infections (acute cystitis).
Compared with Oklahoma prescribers
Tina Gerwin wrote 13 prescriptions for Nitrofurantoin Mono-Macro, about half as often as the typical Oklahoma prescriber of it (28). Medicare paid $14.27 per fill, versus $18.98 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 a wide variety of bacterial infections.
Compared with Oklahoma prescribers
Tina Gerwin wrote 12 prescriptions for Cephalexin, about 37% as often as the typical Oklahoma prescriber of it (32). Medicare paid $10.98 per fill, versus $7.98 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
Cholestyramine is used along with a proper diet to lower cholesterol in the blood.
Compared with Oklahoma prescribers
Tina Gerwin wrote 12 prescriptions for Cholestyramine Light, about 71% as often as the typical Oklahoma prescriber of it (17). Medicare paid $14.54 per fill, versus $90.64 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
Ceftriaxone is used to treat a wide variety of bacterial infections.
Compared with Oklahoma prescribers
Tina Gerwin wrote 11 prescriptions for Ceftriaxone, about 30% as often as the typical Oklahoma prescriber of it (37). Medicare paid $12.69 per fill, versus $78.21 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 Oklahoma prescribers
Tina Gerwin wrote 11 prescriptions for Pantoprazole Sodium, about 12% as often as the typical Oklahoma prescriber of it (92). Medicare paid $7.42 per fill, versus $16.53 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
Questions about Tina Gerwin’s prescriptions
What does Tina Gerwin prescribe most?
In 2024 Medicare Part D data, Tina Gerwin's most prescribed medications were Mirtazapine (47), Methenamine Hippurate (30) and Amoxicillin-Clavulanate Potass (20).
How does Tina Gerwin's prescribing compare with other Oklahoma prescribers?
Of the 13 medications with a state comparison, Tina Gerwin prescribes 2 about as often than the typical Oklahoma prescriber and 11 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Tina Gerwin 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 Oklahoma 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.
