Stephen Vaccarezza, M.D.
NPI 1861488314ActiveIndividual· Internal Medicine, Nephrology· Rockville, MD
Internal Medicine, Nephrology (M.D.) in Rockville, Maryland, trained at University of Chicago, Pritzker School of Medicine (class of 1981). In 2024 Medicare paid $198,070 for 455 patients, and Part D covered 1,445 of their prescriptions, 87% of them generic. Otsuka America Pharmaceutical, Inc. was the largest of 9 companies reporting payments in 2025, $637.09 in all, mostly food and beverage.
Overview
| NPI | 1861488314 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 21, 2005 |
| Last updated in NPPES | Oct 31, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | D35103 | MD |
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 (DC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 455 |
|---|---|
| Services billed | 2,014 across 25 procedure codes |
| Paid by Medicare | $198,070 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,445 · 3,359 30-day fills |
|---|---|
| Patients | 178 |
| Total drug cost | $179,888 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | University of Chicago, Pritzker School of Medicine |
|---|---|
| Graduation year | 1981 |
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Nephrology Associates of Montgomery CountyRockville, MD · 2 clinicians
Hospital affiliations
- Adventist Healthcare Shady Grove Medical CenterRockville, MD
- Holy Cross Germantown HospitalGermantown, MD
- Holy Cross HospitalSilver Spring, MD
- Medstar Montgomery Medical CenterOlney, MD
- Suburban HospitalBethesda, MD
Other facilities
- Advanced Dialysis Center - RockvilleDialysis facility · Rockville, MD
- Bma - BethesdaDialysis facility · Bethesda, MD
- Davita Germantown DialysisDialysis facility · Germantown, MD
- Davita Rock Creek DialysisDialysis facility · Rockville, MD
- Davita Rockville Dialysis CenterDialysis facility · Rockville, MD
- Adventist Home Health Services, Inc.Home health agency · Silver Spring, MD
- Adventist Healthcare Rehabilitation at RockvilleInpatient rehabilitation facility · Rockville, MD
Industry payments (Open Payments)
- 2025$637.09 · 26 payments from 9 companies
- 2024$908.95 · 42 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Otsuka America Pharmaceutical, Inc. | $101.09 | 4 |
| Ardelyx, Inc. | $93.74 | 4 |
| Calliditas Therapeutics US Inc. | $93.45 | 3 |
| Astrazeneca Pharmaceuticals LP | $84.20 | 4 |
| Travere Therapeutics, Inc. | $82.30 | 3 |
What the 2025 payments were for
- Food and Beverage$637.09 · 26 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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