John Gus Stagias, M.D.
NPI 1023012424ActiveIndividual· Internal Medicine, Gastroenterology· Southbridge, MA
Internal Medicine, Gastroenterology (M.D.) in Southbridge, Massachusetts, trained at Albany Medical College of Union University (class of 1988). Their prescriptions cost Medicare Part D more than their services did: $984,426 for 925 claims, against $174,949 paid for services in 2024. Janssen Biotech, Inc. was the largest of 7 companies reporting payments in 2025, $490.17 in all, mostly food and beverage.
Overview
| NPI | 1023012424 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 13, 2005 |
| Last updated in NPPES | Aug 25, 2026 |
| Certified by provider | Aug 25, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 80381 | MA |
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 (CT); Practitioner - Gastroenterology (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 568 |
|---|---|
| Services billed | 4,560 across 54 procedure codes |
| Paid by Medicare | $174,949 |
Part D prescriptions in 2024
| Prescriptions (claims) | 925 · 1,515 30-day fills |
|---|---|
| Patients | 221 |
| Total drug cost | $984,426 |
| Generic share | 81% of claims |
Education and affiliations
| Medical school | Albany Medical College of Union University |
|---|---|
| Graduation year | 1988 |
| Medicare specialty | Gastroenterology |
Hospital affiliation
- Umass Memorial Health - Harrington HospitalSouthbridge, MA
Industry payments (Open Payments)
- 2025$490.17 · 21 payments from 7 companies
- 2024$851.21 · 40 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $301.32 | 11 |
| Abbvie Inc. | $75.40 | 4 |
| Pfizer Inc. | $34.92 | 2 |
| Takeda Pharmaceuticals U.S.A., Inc. | $24.10 | 1 |
| Phathom Pharmaceuticals, Inc. | $20.73 | 1 |
What the 2025 payments were for
- Food and Beverage$490.17 · 21 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Gastroenterology providers in Southbridge
- 1992913982
All Internal Medicine, Gastroenterology providers in Massachusetts →