Kostas Papamarkakis, M.D.
NPI 1699160234ActiveIndividual· Internal Medicine, Nephrology· Worcester, MA
Internal Medicine, Nephrology (M.D.) in Worcester, Massachusetts, trained at Tufts University School of Medicine (class of 2015). Their prescriptions cost Medicare Part D more than their services did: $330,238 for 1,588 claims, against $218,688 paid for services in 2024. Travere Therapeutics, Inc. was the largest of 6 companies reporting payments in 2025, $305.92 in all, mostly food and beverage.
Overview
| NPI | 1699160234 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 31, 2015 |
| Last updated in NPPES | May 27, 2026 |
| Certified by provider | May 27, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 282248 | MA |
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 (CT); Practitioner - Nephrology (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 511 |
|---|---|
| Services billed | 2,117 across 23 procedure codes |
| Paid by Medicare | $218,688 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,588 · 3,246 30-day fills |
|---|---|
| Patients | 347 |
| Total drug cost | $330,238 |
| Generic share | 79% of claims |
Education and affiliations
| Medical school | Tufts University School of Medicine |
|---|---|
| Graduation year | 2015 |
| Medicare specialty | Nephrology |
Medical groups
- Starling Physicians, PLLCWethersfield, CT · 283 clinicians
- Prospect CT Medical Foundation IncManchester, CT · 282 clinicians
- Central Mass NephrologyWorcester, MA · 5 clinicians
Hospital affiliations
- Manchester Memorial HospitalManchester, CT
- St Vincent HospitalWorcester, MA
- Umass Memorial Health - Harrington HospitalSouthbridge, MA
Other facilities
- Davita Vernon Dialysis CenterDialysis facility · Vernon, CT
- Davita Windham Dialysis CenterDialysis facility · North Windham, CT
Industry payments (Open Payments)
- 2025$305.92 · 7 payments from 6 companies
- 2024$248.06 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Travere Therapeutics, Inc. | $127.80 | 2 |
| Alexion Pharmaceuticals, Inc. | $94.99 | 1 |
| Bayer Healthcare Pharmaceuticals Inc. | $25.97 | 1 |
| Calliditas Therapeutics US Inc. | $24.51 | 1 |
| Mannkind Corporation | $19.02 | 1 |
What the 2025 payments were for
- Food and Beverage$210.93 · 6 payments
- Education$94.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other nephrologists in Worcester
- 1013228022
- 1013990084
- 1053548321
- 1073704425
- 1134434210
- 1144425539
- 1164620324
- 1194940692
- 1275556912
- 1275865131
- 1316321326
- 1427580489
All 45 nephrologists in Worcester · All nephrologists in Massachusetts