Carlos F. Zayas, MD
NPI 1205979564ActiveIndividual· Internal Medicine, Nephrology· Greenville, SC
Internal Medicine, Nephrology (MD) in Greenville, South Carolina, trained at University of Puerto Rico School of Medicine (class of 1990). Their prescriptions cost Medicare Part D more than their services did: $321,838 for 3,587 claims, against $71,589 paid for services in 2024. Merck Sharp & Dohme LLC was the largest of 2 companies reporting payments in 2025, $39.78 in all, mostly food and beverage.
Overview
| NPI | 1205979564 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Feb 15, 2007 |
| Last updated in NPPES | May 22, 2023 |
| Certified by provider | May 22, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 36699 | SC |
| Transplant Surgery | 204F00000X | 036668 | GA |
| Transplant Surgery | 204F00000X | 36699 | 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 - Nephrology (GA); Practitioner - Nephrology (SC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 161 |
|---|---|
| Services billed | 970 across 15 procedure codes |
| Paid by Medicare | $71,589 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,587 · 5,255 30-day fills |
|---|---|
| Patients | 208 |
| Total drug cost | $321,838 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | University of Puerto Rico School of Medicine |
|---|---|
| Graduation year | 1990 |
| Medicare specialty | Nephrology |
Medical group
- Prisma Health University Medical GroupGreenville, SC · 2,493 clinicians
Hospital affiliations
- Prisma Health Greenville Memorial HospitalGreenville, SC
- Prisma Health Greer Memorial HospitalSpartanburg, SC
- Prisma Health Hillcrest HospitalSimpsonville, SC
- Prisma Health Oconee Memorial HospitalSeneca, SC
- Prisma Health Richland HospitalColumbia, SC
Industry payments (Open Payments)
- 2025$39.78 · 2 payments from 2 companies
- 2024$286.40 · 4 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $24.07 | 1 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $15.71 | 1 |
What the 2025 payments were for
- Food and Beverage$39.78 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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