WILLIAM JAMES GRENIER APRN, NP-C
Prescription History 1154626521
Nurse Practitioner - Family in Louisville, KY
What does William Grenier prescribe?
In 2024, William Grenier wrote 610 Medicare prescriptions for 28 medications. The most prescribed was Atorvastatin Calcium, with 63 prescriptions for 13 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 William Grenier prescribes.
Medications 28 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 Kentucky prescribers.
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 Kentucky prescribers
William Grenier wrote 63 prescriptions for Atorvastatin Calcium, about 31% as often as the typical Kentucky prescriber of it (203). Medicare paid $5.87 per fill, versus $7.42 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 Kentucky prescribers
William Grenier wrote 49 prescriptions for Losartan Potassium, about half as often as the typical Kentucky prescriber of it (113). Medicare paid $5.75 per fill, versus $7.62 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
Lisinopril is used to treat high blood pressure.
Compared with Kentucky prescribers
William Grenier wrote 38 prescriptions for Lisinopril, about 26% as often as the typical Kentucky prescriber of it (144). Medicare paid $7.25 per fill, versus $4.78 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 Kentucky prescribers
William Grenier wrote 35 prescriptions for Amlodipine Besylate, about 23% as often as the typical Kentucky prescriber of it (152). Medicare paid $4.05 per fill, versus $4.34 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
Albuterol (also known as salbutamol) is used to prevent and treat wheezing and shortness of breath caused by breathing problems (such as asthma, chronic obstructive pulmonary disease).
Compared with Kentucky prescribers
William Grenier wrote 30 prescriptions for Albuterol Sulfate Hfa, about 38% as often as the typical Kentucky prescriber of it (80). Medicare paid $39.99 per fill, versus $30.42 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 Kentucky prescribers
William Grenier wrote 28 prescriptions for Hydrochlorothiazide, about 35% as often as the typical Kentucky prescriber of it (80). Medicare paid $6.61 per fill, versus $3.15 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
Omeprazole is used to treat certain stomach and esophagus problems (such as acid reflux, ulcers).
Compared with Kentucky prescribers
William Grenier wrote 28 prescriptions for Omeprazole, about 22% as often as the typical Kentucky prescriber of it (126). Medicare paid $10.20 per fill, versus $8.25 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 Kentucky prescribers
William Grenier wrote 25 prescriptions for Metoprolol Succinate, about 21% as often as the typical Kentucky prescriber of it (119). Medicare paid $14.74 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
Metformin is used with a proper diet and exercise program and possibly with other medications to control high blood sugar.
Compared with Kentucky prescribers
William Grenier wrote 24 prescriptions for Metformin Hcl, about 24% as often as the typical Kentucky prescriber of it (100). Medicare paid $6.93 per fill, versus $5.12 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
See also Warning section.
Compared with Kentucky prescribers
William Grenier wrote 23 prescriptions for Promethazine Hcl, about 66% as often as the typical Kentucky prescriber of it (35). Medicare paid $16.64 per fill, versus $7.62 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
This medication is used to treat muscle spasms caused by certain conditions (such as multiple sclerosis, spinal cord injury).
Compared with Kentucky prescribers
William Grenier wrote 23 prescriptions for Tizanidine Hcl, about 36% as often as the typical Kentucky prescriber of it (63). Medicare paid $17.28 per fill, versus $8.84 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
Albuterol (also known as salbutamol) is used to prevent and treat wheezing and shortness of breath caused by breathing problems (such as asthma, chronic obstructive pulmonary disease).
Compared with Kentucky prescribers
William Grenier wrote 22 prescriptions for Ventolin Hfa, about 63% as often as the typical Kentucky prescriber of it (35). Medicare paid $63.73 per fill, versus $67.06 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
Fenofibrate 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 Kentucky prescribers
William Grenier wrote 18 prescriptions for Fenofibrate, about 64% as often as the typical Kentucky prescriber of it (28). Medicare paid $7.24 per fill, versus $21.52 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
Ibuprofen is used to relieve pain from various conditions such as headache, dental pain, menstrual cramps, muscle aches, or arthritis.
Compared with Kentucky prescribers
William Grenier wrote 17 prescriptions for Ibuprofen, about 42% as often as the typical Kentucky prescriber of it (41). Medicare paid $11.95 per fill, versus $6.82 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 Kentucky prescribers
William Grenier wrote 17 prescriptions for Potassium Chloride, about 21% as often as the typical Kentucky prescriber of it (80). Medicare paid $12.92 per fill, versus $18.74 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 Kentucky prescribers
William Grenier wrote 17 prescriptions for Rosuvastatin Calcium, about 14% as often as the typical Kentucky prescriber of it (118). Medicare paid $6.59 per fill, versus $9.86 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 nonsteroidal anti-inflammatory drug (NSAID), specifically a COX-2 inhibitor, which relieves pain and swelling (inflammation).
Compared with Kentucky prescribers
William Grenier wrote 14 prescriptions for Celecoxib, about 34% as often as the typical Kentucky prescriber of it (41). Medicare paid $34.30 per fill, versus $33.77 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
Montelukast is used to control and prevent symptoms caused by asthma (such as wheezing and shortness of breath).
Compared with Kentucky prescribers
William Grenier wrote 14 prescriptions for Montelukast Sodium, about 16% as often as the typical Kentucky prescriber of it (89). Medicare paid $8.79 per fill, versus $7.42 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 prevent and decrease symptoms (wheezing and trouble breathing) caused by asthma and ongoing lung disease (chronic obstructive pulmonary disease-COPD, including chronic bronchitis and emphysema).
Compared with Kentucky prescribers
William Grenier wrote 13 prescriptions for Breo Ellipta, about half as often as the typical Kentucky prescriber of it (30). Medicare paid $188.65 per fill, versus $517.63 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
Sitagliptin is used with a proper diet and exercise program and possibly with other medications to control high blood sugar.
Compared with Kentucky prescribers
William Grenier wrote 13 prescriptions for Januvia, about 33% as often as the typical Kentucky prescriber of it (40). Medicare paid $522.44 per fill, versus $888.33 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
Empagliflozin is used with a proper diet and exercise program to control high blood sugar in people with type 2 diabetes.
Compared with Kentucky prescribers
William Grenier wrote 13 prescriptions for Jardiance, about 23% as often as the typical Kentucky prescriber of it (57). Medicare paid $553.27 per fill, versus $959.98 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
Metformin is used with a proper diet and exercise program and possibly with other medications to control high blood sugar.
Compared with Kentucky prescribers
William Grenier wrote 13 prescriptions for Metformin Hcl Er, about 22% as often as the typical Kentucky prescriber of it (59). Medicare paid $5.60 per fill, versus $7.09 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 Kentucky prescribers
William Grenier wrote 13 prescriptions for Pantoprazole Sodium, about 12% as often as the typical Kentucky prescriber of it (109). Medicare paid $4.47 per fill, versus $10.90 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 beta blocker used to treat high blood pressure, irregular heartbeats, shaking (tremors), and other conditions.
Compared with Kentucky prescribers
William Grenier wrote 13 prescriptions for Propranolol Hcl, about half as often as the typical Kentucky prescriber of it (27). Medicare paid $10.81 per fill, versus $15.40 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
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 Kentucky prescribers
William Grenier wrote 12 prescriptions for Furosemide, about 12% as often as the typical Kentucky prescriber of it (97). Medicare paid $4.03 per fill, versus $3.77 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 Kentucky prescribers
William Grenier wrote 12 prescriptions for Metoprolol Tartrate, about 14% as often as the typical Kentucky prescriber of it (85). Medicare paid $8.55 per fill, versus $4.83 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
See also Warning section.
Compared with Kentucky prescribers
William Grenier wrote 12 prescriptions for Naproxen, about half as often as the typical Kentucky prescriber of it (26). Medicare paid $115.09 per fill, versus $10.71 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 depression.
Compared with Kentucky prescribers
William Grenier wrote 11 prescriptions for Trazodone Hcl, about 15% as often as the typical Kentucky prescriber of it (74). Medicare paid $13.15 per fill, versus $7.28 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
Questions about William Grenier’s prescriptions
What does William Grenier prescribe most?
In 2024 Medicare Part D data, William Grenier's most prescribed medications were Atorvastatin Calcium (63), Losartan Potassium (49) and Lisinopril (38).
How does William Grenier's prescribing compare with other Kentucky prescribers?
Of the 28 medications with a state comparison, William Grenier prescribes 28 less often than the typical Kentucky prescriber. Volume reflects practice size as well as prescribing habits.
Does this list show every medication William Grenier 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 Kentucky 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.
