DR. PETER DONALD MAHER IV M.D.
Prescription History 1689857310
Internal Medicine - Gastroenterology in Richland, WA
What does Dr. Maher prescribe?
In 2024, Dr. Maher wrote 217 Medicare prescriptions for 7 medications. The most prescribed was Omeprazole, with 97 prescriptions for 39 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 Dr. Maher prescribes.
Medications 7 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 Washington prescribers.
What it is used for
Omeprazole is used to treat certain stomach and esophagus problems (such as acid reflux, ulcers).
Compared with Washington prescribers
Dr. Maher wrote 97 prescriptions for Omeprazole, about 1.2 times as often as the typical Washington prescriber of it (78). Medicare paid $10.23 per fill, versus $15.28 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 Washington prescribers
Dr. Maher wrote 34 prescriptions for Pantoprazole Sodium, about 70% as often as the typical Washington prescriber of it (49). Medicare paid $9.12 per fill, versus $14.19 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
PEG (polyethylene glycol) with electrolyte is used to clean out the intestines before certain bowel exam procedures such as colonoscopy or barium enema X-rays.
Compared with Washington prescribers
Dr. Maher wrote 28 prescriptions for Gavilyte-G, about half as often as the typical Washington prescriber of it (51). Medicare paid $13.77 per fill, versus $16.74 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
PEG (polyethylene glycol) with electrolyte is used to clean out the intestines before certain bowel exam procedures such as colonoscopy or barium enema X-rays.
Compared with Washington prescribers
Dr. Maher wrote 18 prescriptions for Peg-3350 And Electrolytes, about 35% as often as the typical Washington prescriber of it (51). Medicare paid $17.02 per fill, versus $16.02 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
Sodium/potassium/magnesium sulfate solution is used to clean out the intestines before a certain bowel exam procedure (colonoscopy).
Compared with Washington prescribers
Dr. Maher wrote 15 prescriptions for Sod Sulf-Potass Sulf-Mag Sulf, about 23% as often as the typical Washington prescriber of it (64). Medicare paid $77.63 per fill, versus $63.80 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
Adalimumab is used to reduce pain and swelling due to certain types of arthritis (such as rheumatoid, psoriatic, juvenile idiopathic, ankylosing spondylitis).
Compared with Washington prescribers
Dr. Maher wrote 14 prescriptions for Humira Pen, about 79% as often as the typical Washington prescriber of it (18). Medicare paid $6,811.56 per fill, versus $7,882.48 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
This medication is used to treat a certain bowel disease (ulcerative colitis).
Compared with Washington prescribers
Dr. Maher wrote 11 prescriptions for Mesalamine Er, about 61% as often as the typical Washington prescriber of it (18). Medicare paid $56.49 per fill, versus $178.83 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
Questions about Dr. Maher’s prescriptions
What does Dr. Maher prescribe most?
In 2024 Medicare Part D data, Dr. Maher's most prescribed medications were Omeprazole (97), Pantoprazole Sodium (34) and Gavilyte-G (28).
How does Dr. Maher's prescribing compare with other Washington prescribers?
Of the 7 medications with a state comparison, Dr. Maher prescribes 2 about as often than the typical Washington prescriber and 5 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Maher 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 Washington 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.
