Mary A. Pieprzak, M.D.
NPI 1326046202ActiveIndividual· Internal Medicine, Nephrology· Columbia, MD
Internal Medicine, Nephrology (M.D.) in Columbia, Maryland, trained at State University of New York at Buffalo School of Medicine (class of 1989). 564 Medicare patients in 2024, $195,704 paid; nearly all of their 265 Part D prescriptions were generic (92%). Travere Therapeutics, Inc. reported $1.66 in payments in 2025, mostly education.
Overview
| NPI | 1326046202 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 13, 2005 |
| Last updated in NPPES | Jan 22, 2025 |
| Certified by provider | Jan 22, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | D50616 | MD |
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 - Nephrology (DC); Practitioner - Nephrology (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 564 |
|---|---|
| Services billed | 1,768 across 23 procedure codes |
| Paid by Medicare | $195,704 |
Part D prescriptions in 2024
| Prescriptions (claims) | 265 · 726 30-day fills |
|---|---|
| Patients | 68 |
| Total drug cost | $32,371 |
| Generic share | 92% of claims |
Education and affiliations
| Medical school | State University of New York at Buffalo School of Medicine |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Nephrology |
Medical group
- Mid-Atlantic Nephrology Associates PALaurel, MD · 61 clinicians
Hospital affiliations
- Johns Hopkins Hospital, theBaltimore, MD
- Johns Hopkins Howard County Medical CenterColumbia, MD
- Mercy Medical Center IncBaltimore, MD
Other facilities
- Davita Cedar Lane DialysisDialysis facility · Columbia, MD
- Davita Howard County DialysisDialysis facility · Columbia, MD
Industry payments (Open Payments)
- 2025$1.66 · 1 payment from 1 company
- 2024$168.15 · 7 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Travere Therapeutics, Inc. | $1.66 | 1 |
What the 2025 payments were for
- Education$1.66 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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