CALVIN KNOWLES
Prescription History 1497345706
Physician Assistant in Berlin, NH
What does Calvin Knowles prescribe?
In 2024, Calvin Knowles wrote 593 Medicare prescriptions for 18 medications. The most prescribed was Metoprolol Succinate, with 111 prescriptions for 51 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 Calvin Knowles prescribes.
Medications 18 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 New Hampshire prescribers.
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 New Hampshire prescribers
Calvin Knowles wrote 111 prescriptions for Metoprolol Succinate, about 1.2 times as often as the typical New Hampshire prescriber of it (94). Medicare paid $10.16 per fill, versus $14.32 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
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 New Hampshire prescribers
Calvin Knowles wrote 61 prescriptions for Furosemide, about as often as the typical New Hampshire prescriber of it (63). Medicare paid $3.47 per fill, versus $5.26 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
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 New Hampshire prescribers
Calvin Knowles wrote 50 prescriptions for Atorvastatin Calcium, about 30% as often as the typical New Hampshire prescriber of it (169). Medicare paid $4.68 per fill, versus $9.41 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 New Hampshire prescribers
Calvin Knowles wrote 45 prescriptions for Amlodipine Besylate, about 41% as often as the typical New Hampshire prescriber of it (110). Medicare paid $6.86 per fill, versus $6.26 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
Isosorbide mononitrate is used to prevent chest pain (angina) in patients with a certain heart condition (coronary artery disease).
Compared with New Hampshire prescribers
Calvin Knowles wrote 44 prescriptions for Isosorbide Mononitrate Er, about 1.3 times as often as the typical New Hampshire prescriber of it (34). Medicare paid $7.38 per fill, versus $13.39 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
Metoprolol is used with or without other medications to treat high blood pressure (hypertension).
Compared with New Hampshire prescribers
Calvin Knowles wrote 35 prescriptions for Metoprolol Tartrate, about 67% as often as the typical New Hampshire prescriber of it (52). Medicare paid $4.43 per fill, versus $6.94 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 New Hampshire prescribers
Calvin Knowles wrote 28 prescriptions for Lisinopril, about 25% as often as the typical New Hampshire prescriber of it (114). Medicare paid $3.21 per fill, versus $6.30 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 New Hampshire prescribers
Calvin Knowles wrote 26 prescriptions for Eliquis, about 36% as often as the typical New Hampshire prescriber of it (72). Medicare paid $1,093.72 per fill, versus $898.74 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
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 New Hampshire prescribers
Calvin Knowles wrote 25 prescriptions for Rosuvastatin Calcium, about 33% as often as the typical New Hampshire prescriber of it (76). Medicare paid $12.28 per fill, versus $15.89 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
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 New Hampshire prescribers
Calvin Knowles wrote 22 prescriptions for Clopidogrel, about 62% as often as the typical New Hampshire prescriber of it (35). Medicare paid $12.42 per fill, versus $11.64 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
Spironolactone is used to treat high blood pressure and heart failure.
Compared with New Hampshire prescribers
Calvin Knowles wrote 22 prescriptions for Spironolactone, about 62% as often as the typical New Hampshire prescriber of it (36). Medicare paid $8.01 per fill, versus $9.08 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 New Hampshire prescribers
Calvin Knowles wrote 21 prescriptions for Potassium Chloride, about half as often as the typical New Hampshire prescriber of it (41). Medicare paid $15.39 per fill, versus $24.29 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
Rivaroxaban is used to prevent blood clots from forming due to a certain irregular heartbeat (atrial fibrillation) or after hip or knee replacement surgery.
Compared with New Hampshire prescribers
Calvin Knowles wrote 21 prescriptions for Xarelto, about 65% as often as the typical New Hampshire prescriber of it (32). Medicare paid $1,026.23 per fill, versus $994.26 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
Losartan is used to treat high blood pressure (hypertension) and to help protect the kidneys from damage due to diabetes.
Compared with New Hampshire prescribers
Calvin Knowles wrote 20 prescriptions for Losartan Potassium, about 23% as often as the typical New Hampshire prescriber of it (85). Medicare paid $6.52 per fill, versus $8.64 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
Diltiazem is used to treat high blood pressure (hypertension) and prevent chest pain (angina).
Compared with New Hampshire prescribers
Calvin Knowles wrote 18 prescriptions for Diltiazem 24hr Er (Cd), about 62% as often as the typical New Hampshire prescriber of it (29). Medicare paid $20.76 per fill, versus $31.97 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 New Hampshire prescribers
Calvin Knowles wrote 17 prescriptions for Carvedilol, about half as often as the typical New Hampshire prescriber of it (39). Medicare paid $1.95 per fill, versus $8.50 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
Torsemide is used to reduce extra fluid in the body (edema) caused by conditions such as heart failure, liver disease, and kidney disease.
Compared with New Hampshire prescribers
Calvin Knowles wrote 14 prescriptions for Torsemide, about half as often as the typical New Hampshire prescriber of it (33). Medicare paid $10.60 per fill, versus $23.99 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
Ezetimibe is used along with a low cholesterol/low fat diet and exercise to help lower cholesterol in the blood.
Compared with New Hampshire prescribers
Calvin Knowles wrote 13 prescriptions for Ezetimibe, about 39% as often as the typical New Hampshire prescriber of it (33). Medicare paid $22.09 per fill, versus $26.98 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
Questions about Calvin Knowles’s prescriptions
What does Calvin Knowles prescribe most?
In 2024 Medicare Part D data, Calvin Knowles's most prescribed medications were Metoprolol Succinate (111), Furosemide (61) and Atorvastatin Calcium (50).
How does Calvin Knowles's prescribing compare with other New Hampshire prescribers?
Of the 18 medications with a state comparison, Calvin Knowles prescribes 1 more often than the typical New Hampshire prescriber, 2 about as often and 15 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Calvin Knowles 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 New Hampshire 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.
