John K. Corless, MD
NPI 1962408443ActiveIndividual· Specialist· Charleston, SC
Specialist (MD) with University Medical Associates of the Medical University of South Carol, practicing in Charleston, South Carolina. In 2024 Medicare paid $10,542 for 60 patients, and Part D covered 85 of their prescriptions, 74% of them generic. Celltrion USA Inc. reported $85.20 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1962408443 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 21, 2005 |
| Last updated in NPPES | Jul 13, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Specialist Primary | 174400000X | 8734 | SC |
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 (SC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 60 |
|---|---|
| Services billed | 111 across 15 procedure codes |
| Paid by Medicare | $10,542 |
Part D prescriptions in 2024
| Prescriptions (claims) | 85 · 90 30-day fills |
|---|---|
| Patients | 72 |
| Total drug cost | $3,579 |
| Generic share | 74% of claims |
Education and affiliations
| Graduation year | 1977 |
|---|---|
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Medical group
- University Medical Associates of the Medical University of South CarolCharleston, SC · 1,668 clinicians
Industry payments (Open Payments)
- 2025$85.20 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Celltrion USA Inc. | $85.20 | 1 |
What the 2025 payments were for
- Food and Beverage$85.20 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 81 Specialist providers in Charleston · All Specialist providers in South Carolina