Nelson L. Ferreira, M.D.
NPI 1679563746ActiveIndividual· Internal Medicine, Gastroenterology· Hagerstown, MD
Internal Medicine, Gastroenterology (M.D.) in Hagerstown, Maryland, trained at George Washington University School of Medicine (class of 1988). Their prescriptions cost Medicare Part D more than their services did: $80,878 for 897 claims, against $40,645 paid for services in 2024. Phathom Pharmaceuticals, Inc. was the largest of 2 companies reporting payments in 2025, $2,452 in all, mostly speaking and faculty fees.
Overview
| NPI | 1679563746 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 28, 2005 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | D44361 | MD |
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 (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 440 |
|---|---|
| Services billed | 646 across 4 procedure codes |
| Paid by Medicare | $40,645 |
Part D prescriptions in 2024
| Prescriptions (claims) | 897 · 1,558 30-day fills |
|---|---|
| Patients | 382 |
| Total drug cost | $80,878 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | George Washington University School of Medicine |
|---|---|
| Graduation year | 1988 |
| Medicare specialty | Gastroenterology |
Medical groups
- Meritus Medical Center IncHagerstown, MD · 743 clinicians
- Medical Practices of Antietam, LLCHagerstown, MD · 234 clinicians
Hospital affiliation
- Meritus Medical CenterHagerstown, MD
Industry payments (Open Payments)
- 2025$2,452 · 3 payments from 2 companies
- 2024$10,088 · 16 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Phathom Pharmaceuticals, Inc. | $2,434 | 2 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $17.83 | 1 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$2,400 · 1 payment
- Food and Beverage$51.77 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other gastroenterologists in Hagerstown
- 1093354698
- 1134568306
- 1144485467
- 1285637116
- 1538148283
- 1659361723
- 1740242106
- 1861650384
- 1043541147
- 1154791143
- 1497553135
- 1518517754
All 17 gastroenterologists in Hagerstown · All gastroenterologists in Maryland