Mark George Seredowych, M.D.
NPI 1275545782ActiveIndividual· Internal Medicine· Santa Fe, NM
Internal Medicine (M.D.) with Nexus Health Primary Care LLC, practicing in Santa Fe, New Mexico. Their prescriptions cost Medicare Part D more than their services did: $650,007 for 6,724 claims, against $136,316 paid for services in 2024. Viatris Specialty LLC was the largest of 20 companies reporting payments in 2025, $1,417 in all, mostly food and beverage. Lists Christus St Vincent Regional Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1275545782 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Aug 13, 2006 |
| Last updated in NPPES | Sep 29, 2026 |
| Certified by provider | Jan 12, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 2000-89 | NM |
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 - Internal Medicine (NM) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 391 |
|---|---|
| Services billed | 2,299 across 20 procedure codes |
| Paid by Medicare | $136,316 |
Part D prescriptions in 2024
| Prescriptions (claims) | 6,724 · 14,811 30-day fills |
|---|---|
| Patients | 426 |
| Total drug cost | $650,007 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 1987 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Nexus Health Primary Care LLCSanta Fe, NM · 9 clinicians
Hospital affiliations
- Christus St Vincent Regional Medical CenterSanta Fe, NM
- Presbyterian Santa Fe Medical CenterSanta Fe, NM
Other facilities
- Ambercare Home HealthHome health agency · Belen, NM
- Centerwell Home HealthHome health agency · Albuquerque, NM
Industry payments (Open Payments)
- 2025$1,417 · 69 payments from 20 companies
- 2024$1,258 · 60 payments from 24 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Viatris Specialty LLC | $285.98 | 7 |
| Aimmune Therapeutics, Inc. | $207.53 | 16 |
| Astrazeneca Pharmaceuticals LP | $202.47 | 11 |
| Novo Nordisk Inc | $111.92 | 5 |
| Lilly USA, LLC | $99.62 | 4 |
What the 2025 payments were for
- Food and Beverage$1,417 · 69 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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