MARY J KEEGAN APN
Prescription History 1336157213
Nurse Practitioner - Adult Health in Saint Louis, MO
What does Mary Keegan prescribe?
In 2024, Mary Keegan wrote 838 Medicare prescriptions for 26 medications. The most prescribed was Furosemide, with 99 prescriptions for 32 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 Mary Keegan prescribes.
Medications 26 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 Missouri prescribers.
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 Missouri prescribers
Mary Keegan wrote 99 prescriptions for Furosemide, about as often as the typical Missouri prescriber of it (106). Medicare paid $4.35 per fill, versus $4.64 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
Amlodipine is used with or without other medications to treat high blood pressure.
Compared with Missouri prescribers
Mary Keegan wrote 76 prescriptions for Amlodipine Besylate, about half as often as the typical Missouri prescriber of it (164). Medicare paid $5.16 per fill, versus $5.31 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 Missouri prescribers
Mary Keegan wrote 68 prescriptions for Metoprolol Succinate, about half as often as the typical Missouri prescriber of it (124). Medicare paid $4.80 per fill, versus $11.38 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 relieve chest pain (angina) in people that have a certain heart condition (coronary artery disease).
Compared with Missouri prescribers
Mary Keegan wrote 58 prescriptions for Nitroglycerin, about 1.7 times as often as the typical Missouri prescriber of it (34). Medicare paid $10.20 per fill, versus $12.26 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
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 Missouri prescribers
Mary Keegan wrote 42 prescriptions for Eliquis, about 38% as often as the typical Missouri prescriber of it (110). Medicare paid $871.90 per fill, versus $777.14 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
Isosorbide dinitrate is used to prevent chest pain (angina) in patients with a certain heart condition (coronary artery disease).
Compared with Missouri prescribers
Mary Keegan wrote 40 prescriptions for Isosorbide Dinitrate, about 1.8 times as often as the typical Missouri prescriber of it (22). Medicare paid $23.11 per fill, versus $42.96 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
Losartan is used to treat high blood pressure (hypertension) and to help protect the kidneys from damage due to diabetes.
Compared with Missouri prescribers
Mary Keegan wrote 40 prescriptions for Losartan Potassium, about 31% as often as the typical Missouri prescriber of it (128). Medicare paid $2.84 per fill, versus $7.83 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 Missouri prescribers
Mary Keegan wrote 39 prescriptions for Carvedilol, about half as often as the typical Missouri prescriber of it (91). Medicare paid $4.25 per fill, versus $7.11 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 Missouri prescribers
Mary Keegan wrote 36 prescriptions for Potassium Chloride, about 40% as often as the typical Missouri prescriber of it (90). Medicare paid $12.02 per fill, versus $17.91 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
Metoprolol is used with or without other medications to treat high blood pressure (hypertension).
Compared with Missouri prescribers
Mary Keegan wrote 35 prescriptions for Metoprolol Tartrate, about 41% as often as the typical Missouri prescriber of it (86). Medicare paid $3.33 per fill, versus $5.80 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 Missouri prescribers
Mary Keegan wrote 29 prescriptions for Hydralazine Hcl, about 64% as often as the typical Missouri prescriber of it (45). Medicare paid $9.59 per fill, versus $11.92 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 Missouri prescribers
Mary Keegan wrote 29 prescriptions for Lisinopril, about 19% as often as the typical Missouri prescriber of it (151). Medicare paid $4.11 per fill, versus $5.80 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
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 Missouri prescribers
Mary Keegan wrote 24 prescriptions for Atorvastatin Calcium, about 11% as often as the typical Missouri prescriber of it (225). Medicare paid $3.69 per fill, versus $8.36 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 Missouri prescribers
Mary Keegan wrote 23 prescriptions for Clopidogrel, about 31% as often as the typical Missouri prescriber of it (74). Medicare paid $15.73 per fill, versus $9.48 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
Isosorbide mononitrate is used to prevent chest pain (angina) in patients with a certain heart condition (coronary artery disease).
Compared with Missouri prescribers
Mary Keegan wrote 23 prescriptions for Isosorbide Mononitrate Er, about half as often as the typical Missouri prescriber of it (54). Medicare paid $6.76 per fill, versus $10.65 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
Pravastatin 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 Missouri prescribers
Mary Keegan wrote 21 prescriptions for Pravastatin Sodium, about 36% as often as the typical Missouri prescriber of it (59). Medicare paid $5.85 per fill, versus $10.59 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
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 Missouri prescribers
Mary Keegan wrote 21 prescriptions for Rosuvastatin Calcium, about 17% as often as the typical Missouri prescriber of it (127). Medicare paid $7.64 per fill, versus $10.73 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
Ezetimibe is used along with a low cholesterol/low fat diet and exercise to help lower cholesterol in the blood.
Compared with Missouri prescribers
Mary Keegan wrote 18 prescriptions for Ezetimibe, about 32% as often as the typical Missouri prescriber of it (57). Medicare paid $12.85 per fill, versus $18.89 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
This medication is used to treat high blood pressure.
Compared with Missouri prescribers
Mary Keegan wrote 18 prescriptions for Hydrochlorothiazide, about 21% as often as the typical Missouri prescriber of it (85). Medicare paid $3.20 per fill, versus $3.84 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
Cilostazol is used to improve the symptoms of a certain blood flow problem in the legs (intermittent claudication).
Compared with Missouri prescribers
Mary Keegan wrote 17 prescriptions for Cilostazol, about 64% as often as the typical Missouri prescriber of it (26). Medicare paid $21.55 per fill, versus $19.79 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
Evolocumab is used along with a proper diet to help lower "bad" cholesterol (LDL) in the blood.
Compared with Missouri prescribers
Mary Keegan wrote 17 prescriptions for Repatha Sureclick, about 36% as often as the typical Missouri prescriber of it (47). Medicare paid $560.30 per fill, versus $869.91 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
Diltiazem is used to treat high blood pressure (hypertension) and prevent chest pain (angina).
Compared with Missouri prescribers
Mary Keegan wrote 15 prescriptions for Diltiazem 24hr Er (Cd), about 34% as often as the typical Missouri prescriber of it (44). Medicare paid $3.77 per fill, versus $25.72 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
Spironolactone is used to treat high blood pressure and heart failure.
Compared with Missouri prescribers
Mary Keegan wrote 15 prescriptions for Spironolactone, about 25% as often as the typical Missouri prescriber of it (61). Medicare paid $4.81 per fill, versus $7.43 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
Diltiazem is used to prevent chest pain (angina).
Compared with Missouri prescribers
Mary Keegan wrote 13 prescriptions for Diltiazem Hcl, about half as often as the typical Missouri prescriber of it (25). Medicare paid $19.33 per fill, versus $21.62 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
Enalapril is used to treat high blood pressure.
Compared with Missouri prescribers
Mary Keegan wrote 11 prescriptions for Enalapril Maleate, about half as often as the typical Missouri prescriber of it (24). Medicare paid $4.61 per fill, versus $15.12 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 drug is used to treat high blood pressure.
Compared with Missouri prescribers
Mary Keegan wrote 11 prescriptions for Triamterene-Hydrochlorothiazid, about 32% as often as the typical Missouri prescriber of it (34). Medicare paid $11.40 per fill, versus $8.07 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
Questions about Mary Keegan’s prescriptions
What does Mary Keegan prescribe most?
In 2024 Medicare Part D data, Mary Keegan's most prescribed medications were Furosemide (99), Amlodipine Besylate (76) and Metoprolol Succinate (68).
How does Mary Keegan's prescribing compare with other Missouri prescribers?
Of the 26 medications with a state comparison, Mary Keegan prescribes 2 more often than the typical Missouri prescriber, 1 about as often and 23 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Mary Keegan 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 Missouri 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.
