Mark Kenneth Detweiler, M.D.
NPI 1548344583ActiveIndividual· Specialist· Londonderry, NH
Specialist (M.D.) in Londonderry, New Hampshire, trained at Pennsylvania State University College of Medicine (class of 1979). 65 Medicare patients in 2024, $17,154 paid; nearly all of their 128 Part D prescriptions were generic (90%).
Overview
| NPI | 1548344583 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 25, 2006 |
| Last updated in NPPES | Apr 24, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Specialist Primary | 174400000X | 6919 | NH |
| Internal Medicine, Gastroenterology | 207RG0100X | 6919 | 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 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 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 | 65 |
|---|---|
| Services billed | 163 across 4 procedure codes |
| Paid by Medicare | $17,154 |
Part D prescriptions in 2024
| Prescriptions (claims) | 128 · 202 30-day fills |
|---|---|
| Patients | 28 |
| Total drug cost | $19,733 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | Pennsylvania State University College of Medicine |
|---|---|
| Graduation year | 1979 |
| Medicare specialty | Gastroenterology |
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Specialist providers in Londonderry
- 1609971001
- 1184747503
- 1851318281
- 1568801165
- 1932322674
- 1598994196