Donald James McMahon, D.O.
NPI 1285824839ActiveIndividual· Internal Medicine, Gastroenterology· Turnersville, NJ
Internal Medicine, Gastroenterology (D.O.) in Turnersville, New Jersey, trained at Lake Erie College of Osteopathic Medicine, Erie (class of 2004). Their prescriptions cost Medicare Part D more than their services did: $639,025 for 555 claims, against $34,572 paid for services in 2024.
Overview
| NPI | 1285824839 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Jul 30, 2007 |
| Last updated in NPPES | Jan 19, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 25MB0862200 | NJ |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (NJ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 208 |
|---|---|
| Services billed | 303 across 12 procedure codes |
| Paid by Medicare | $34,572 |
Part D prescriptions in 2024
| Prescriptions (claims) | 555 · 1,027 30-day fills |
|---|---|
| Patients | 142 |
| Total drug cost | $639,025 |
| Generic share | 76% of claims |
Education and affiliations
| Medical school | Lake Erie College of Osteopathic Medicine, Erie |
|---|---|
| Graduation year | 2004 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Medical group
- Cooper Care Alliance, PCCherry Hill, NJ · 118 clinicians
Hospital affiliation
- Cooper University HospitalCamden, NJ
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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