Surianarayanan Karthikeyan, MD
NPI 1881725836ActiveIndividual· Internal Medicine, Gastroenterology· Fargo, ND
Internal Medicine, Gastroenterology (MD) with Physician Care PC, practicing in Fargo, North Dakota. Their prescriptions cost Medicare Part D more than their services did: $171,843 for 272 claims, against $38,153 paid for services in 2024. Takeda Pharmaceuticals U.S.A., Inc. was the largest of 4 companies reporting payments in 2025, $227.08 in all, mostly food and beverage. Lists Oswego Hospital as a hospital affiliation.
Overview
| NPI | 1881725836 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Mar 8, 2007 |
| Last updated in NPPES | Feb 5, 2025 |
| Certified by provider | Feb 5, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 220745-1 | NY |
| Internal Medicine, Gastroenterology | 207RG0100X | 21916 | ND |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 206 |
|---|---|
| Services billed | 340 across 33 procedure codes |
| Paid by Medicare | $38,153 |
Part D prescriptions in 2024
| Prescriptions (claims) | 272 · 533 30-day fills |
|---|---|
| Patients | 110 |
| Total drug cost | $171,843 |
| Generic share | 84% of claims |
Education and affiliations
| Graduation year | 1979 |
|---|---|
| Medicare specialty | Gastroenterology |
Medical group
- Physician Care PCOswego, NY · 74 clinicians
Hospital affiliation
- Oswego HospitalOswego, NY
Industry payments (Open Payments)
- 2025$227.08 · 11 payments from 4 companies
- 2024$533.67 · 23 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Takeda Pharmaceuticals U.S.A., Inc. | $80.29 | 4 |
| Abbvie Inc. | $56.59 | 3 |
| Janssen Biotech, Inc. | $51.56 | 2 |
| Ipsen Biopharmaceuticals, Inc | $38.64 | 2 |
What the 2025 payments were for
- Food and Beverage$227.08 · 11 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All Internal Medicine, Gastroenterology providers in North Dakota →