James Peter Adam Hamilton, M.D.
NPI 1295802791ActiveIndividual· Internal Medicine, Gastroenterology· Baltimore, MD
Internal Medicine, Gastroenterology (M.D.) in Baltimore, Maryland, trained at University of Maryland School of Medicine (class of 2000). Their prescriptions cost Medicare Part D more than their services did: $133,769 for 500 claims, against $71,668 paid for services in 2024. Orphalan Inc was the largest of 10 companies reporting payments in 2025, $4,354 in all, mostly honoraria.
Overview
| NPI | 1295802791 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Nov 29, 2006 |
| Last updated in NPPES | Feb 7, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | D0064193 | MD |
| Internal Medicine, Hepatology | 207RI0008X | D0064193 | MD |
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 (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 234 |
|---|---|
| Services billed | 2,246 across 45 procedure codes |
| Paid by Medicare | $71,668 |
Part D prescriptions in 2024
| Prescriptions (claims) | 500 · 1,047 30-day fills |
|---|---|
| Patients | 95 |
| Total drug cost | $133,769 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | University of Maryland School of Medicine |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Medical group
- Johns Hopkins UniversityBaltimore, MD · 2,909 clinicians
Hospital affiliations
- Johns Hopkins Bayview Medical CenterBaltimore, MD
- Johns Hopkins Hospital, theBaltimore, MD
Industry payments (Open Payments)
- 2025$4,354 · 28 payments from 10 companies
- 2024$1,135 · 13 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Orphalan Inc | $2,513 | 4 |
| Madrigal Pharmaceuticals | $751.84 | 14 |
| Merck Sharp & Dohme LLC | $750.00 | 1 |
| Gilead Sciences, Inc. | $142.63 | 1 |
| Ipsen Biopharmaceuticals, Inc | $71.68 | 3 |
What the 2025 payments were for
- Honoraria$2,400 · 1 payment
- Food and Beverage$1,204 · 26 payments
- Consulting Fee$750.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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