WILLIAM ELLIS DOAK
Prescription History 1477243772
Internal Medicine in Providence, RI
What does William Doak prescribe?
In 2024, William Doak wrote 154 Medicare prescriptions for 10 medications. The most prescribed was Losartan Potassium, with 21 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 William Doak prescribes.
Medications 10 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 Rhode Island prescribers.
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 Rhode Island prescribers
William Doak wrote 21 prescriptions for Losartan Potassium, about 19% as often as the typical Rhode Island prescriber of it (112). Medicare paid $10.29 per fill, versus $11.00 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
Gabapentin is used with other medications to prevent and control seizures.
Compared with Rhode Island prescribers
William Doak wrote 20 prescriptions for Gabapentin, about 26% as often as the typical Rhode Island prescriber of it (78). Medicare paid $16.10 per fill, versus $17.01 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 Rhode Island prescribers
William Doak wrote 18 prescriptions for Atorvastatin Calcium, about 9% as often as the typical Rhode Island prescriber of it (202). Medicare paid $21.31 per fill, versus $12.20 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 Rhode Island prescribers
William Doak wrote 16 prescriptions for Omeprazole, about 14% as often as the typical Rhode Island prescriber of it (117). Medicare paid $23.02 per fill, versus $14.93 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 Rhode Island prescribers
William Doak wrote 15 prescriptions for Rosuvastatin Calcium, about 16% as often as the typical Rhode Island prescriber of it (96). Medicare paid $5.96 per fill, versus $16.48 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
Amlodipine is used with or without other medications to treat high blood pressure.
Compared with Rhode Island prescribers
William Doak wrote 14 prescriptions for Amlodipine Besylate, about 10% as often as the typical Rhode Island prescriber of it (136). Medicare paid $14.89 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
Finasteride is used to shrink an enlarged prostate (benign prostatic hyperplasia or BPH) in adult men.
Compared with Rhode Island prescribers
William Doak wrote 14 prescriptions for Finasteride, about 24% as often as the typical Rhode Island prescriber of it (58). Medicare paid $12.80 per fill, versus $14.79 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
This medication is used to treat high blood pressure.
Compared with Rhode Island prescribers
William Doak wrote 13 prescriptions for Hydrochlorothiazide, about 18% as often as the typical Rhode Island prescriber of it (74). Medicare paid $1.38 per fill, versus $4.32 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
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 Rhode Island prescribers
William Doak wrote 12 prescriptions for Albuterol Sulfate Hfa, about 18% as often as the typical Rhode Island prescriber of it (67). Medicare paid $23.54 per fill, versus $27.47 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 Rhode Island prescribers
William Doak wrote 11 prescriptions for Lisinopril, about 9% as often as the typical Rhode Island prescriber of it (127). Medicare paid $7.88 per fill, versus $9.15 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 Doak’s prescriptions
What does William Doak prescribe most?
In 2024 Medicare Part D data, William Doak's most prescribed medications were Losartan Potassium (21), Gabapentin (20) and Atorvastatin Calcium (18).
How does William Doak's prescribing compare with other Rhode Island prescribers?
Of the 10 medications with a state comparison, William Doak prescribes 10 less often than the typical Rhode Island prescriber. Volume reflects practice size as well as prescribing habits.
Does this list show every medication William Doak 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 Rhode Island 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.
