John Douglas Clark, MD
NPI 1194798595ActiveIndividual· Internal Medicine, Critical Care Medicine· Spartanburg, SC
Internal Medicine, Critical Care Medicine (MD) in Spartanburg, South Carolina, trained at University of Tennessee, Hsc, College of Medicine (class of 1985). Their prescriptions cost Medicare Part D more than their services did: $1,172,938 for 2,490 claims, against $138,096 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 24 companies reporting payments in 2025, $3,263 in all, mostly food and beverage.
Overview
| NPI | 1194798595 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Feb 8, 2006 |
| Last updated in NPPES | Dec 28, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Critical Care Medicine Primary | 207RC0200X | 19596 | SC |
| Internal Medicine, Pulmonary Disease | 207RP1001X | 19596 | SC |
| Internal Medicine | 207R00000X | 19596 | SC |
| Internal Medicine, Sleep Medicine | 207RS0012X | 19596 | SC |
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 - Pulmonary Disease (SC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 615 |
|---|---|
| Services billed | 2,322 across 47 procedure codes |
| Paid by Medicare | $138,096 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,490 · 3,500 30-day fills |
|---|---|
| Patients | 430 |
| Total drug cost | $1,172,938 |
Education and affiliations
| Medical school | University of Tennessee, Hsc, College of Medicine |
|---|---|
| Graduation year | 1985 |
| Medicare specialty | Pulmonary Disease |
| Secondary specialties | Critical Care (Intensivists), Sleep Medicine |
Hospital affiliations
- Cherokee Medical CenterGaffney, SC
- Pelham Medical CenterGreer, SC
- Spartanburg Medical CenterSpartanburg, SC
Industry payments (Open Payments)
- 2025$3,263 · 145 payments from 24 companies
- 2024$2,799 · 115 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $432.00 | 14 |
| Glaxosmithkline, LLC. | $330.41 | 18 |
| Actelion Pharmaceuticals US, Inc. | $290.36 | 6 |
| Regeneron Healthcare Solutions, Inc. | $274.27 | 10 |
| Genzyme Corporation | $258.19 | 11 |
What the 2025 payments were for
- Food and Beverage$3,177 · 143 payments
- Education$86.37 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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