Karl S. Demarco, MD
NPI 1205483781ActiveIndividual· Family Medicine· Tyndall, SD
Family Medicine (MD) with St Michael's Hospital, Inc., practicing in Tyndall, South Dakota. Their prescriptions cost Medicare Part D more than their services did: $81,338 for 1,993 claims, against $2,050 paid for services in 2024. Viatris Specialty LLC was the largest of 2 companies reporting payments in 2025, $72.74 in all, mostly food and beverage. Lists Avera Sacred Heart Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1205483781 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 20, 2019 |
| Last updated in NPPES | Sep 12, 2024 |
| Certified by provider | Sep 12, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 13975 | SD |
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 - Family Practice (SD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 14 |
|---|---|
| Services billed | 28 across 7 procedure codes |
| Paid by Medicare | $2,050 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,993 · 2,589 30-day fills |
|---|---|
| Patients | 153 |
| Total drug cost | $81,338 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 2019 |
|---|---|
| Medicare specialty | Family Practice |
Medical group
- St Michael's Hospital, Inc.Tyndall, SD · 17 clinicians
Hospital affiliations
- Avera Sacred Heart HospitalYankton, SD
- St Michael's Hospital - CahTyndall, SD
Other facilities
- Avera @ HomeHome health agency · Yankton, SD
Industry payments (Open Payments)
- 2025$72.74 · 3 payments from 2 companies
- 2024$36.49 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Viatris Specialty LLC | $39.92 | 1 |
| Amgen Inc. | $32.82 | 2 |
What the 2025 payments were for
- Food and Beverage$72.74 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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