Marcum G. Gillis, MD
NPI 1053571620ActiveIndividual· Internal Medicine, Gastroenterology· Winston Salem, NC
Internal Medicine, Gastroenterology (MD) with Digestive Health Specialists PA, practicing in Winston Salem, North Carolina. Their prescriptions cost Medicare Part D more than their services did: $448,806 for 2,542 claims, against $159,076 paid for services in 2024. Madrigal Pharmaceuticals was the largest of 2 companies reporting payments in 2025, $145.20 in all, mostly food and beverage. Lists Novant Health Forsyth Medical Center as a hospital affiliation.
Overview
| NPI | 1053571620 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 16, 2008 |
| Last updated in NPPES | Aug 8, 2024 |
| Certified by provider | Aug 8, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 2011-01846 | NC |
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 (NC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 368 |
|---|---|
| Services billed | 8,589 across 42 procedure codes |
| Paid by Medicare | $159,076 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,542 · 4,799 30-day fills |
|---|---|
| Patients | 691 |
| Total drug cost | $448,806 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 2008 |
|---|---|
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Medical group
- Digestive Health Specialists PAThomasville, NC · 26 clinicians
Hospital affiliation
- Novant Health Forsyth Medical CenterWinston-Salem, NC
Industry payments (Open Payments)
- 2025$145.20 · 3 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Madrigal Pharmaceuticals | $86.60 | 1 |
| Pentax of America, Inc. | $58.60 | 2 |
What the 2025 payments were for
- Food and Beverage$145.20 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 75 gastroenterologists in Winston Salem · All gastroenterologists in North Carolina