William E. Maher, M.D.
NPI 1477550739ActiveIndividual· Internal Medicine, Gastroenterology· Somersworth, NH
Internal Medicine, Gastroenterology (M.D.) in Somersworth, New Hampshire, trained at Rutgers New Jersey Medical School (class of 1992). 845 Medicare patients in 2024, $199,200 paid; nearly all of their 917 Part D prescriptions were generic (90%). Abbvie Inc. reported $28.79 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1477550739 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 1, 2005 |
| Last updated in NPPES | Sep 30, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 10956 | NH |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (NH) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 845 |
|---|---|
| Services billed | 6,553 across 58 procedure codes |
| Paid by Medicare | $199,200 |
Part D prescriptions in 2024
| Prescriptions (claims) | 917 · 1,779 30-day fills |
|---|---|
| Patients | 254 |
| Total drug cost | $290,950 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | Rutgers New Jersey Medical School |
|---|---|
| Graduation year | 1992 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Atlantic Digestive Specialists PLLCSomersworth, NH · 17 clinicians
Hospital affiliations
- Frisbie Memorial HospitalRochester, NH
- Huggins HospitalWolfeboro, NH
- Portsmouth Regional HospitalPortsmouth, NH
- Wentworth-Douglass HospitalDover, NH
- York HospitalYork, ME
Industry payments (Open Payments)
- 2025$28.79 · 1 payment from 1 company
- 2024$128.27 · 6 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $28.79 | 1 |
What the 2025 payments were for
- Food and Beverage$28.79 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All Internal Medicine, Gastroenterology providers in New Hampshire →