Mary A. Pieprzak, M.D.
Nephrology Physician · Columbia, MD
Mary A. Pieprzak, M.D. is a nephrology physician with a practice address in Columbia, Maryland, and NPI 1326046202, issued on Jul 13, 2005. Check the license (Maryland D50616, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Mary A. Pieprzak
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- D50616 MD
Self-reported in NPPES; status is on the state search - Practice location
- 5999 Harpers Farm RD Ste W250, Columbia, MD 21044
- Phone
- (410) 772-8822
- Enumerated
- Jul 13, 2005
- Record last updated
- Jan 22, 2025
- Fax
- (410) 772-9274
- Medicare enrollment
- Enrolled (PECOS I20200609000087); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Buffalo School Of Medicine, 1989
- Entity
- Type 1 · individual
Also registered at 5999 Harpers Farm RD Ste W250
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ping-Hsin Chen, M.D.Nephrology Physician1174521637
- Floyd Johnson, NPAcute Care Nurse Practitioner1033340799
- Ajay Kumar, M.D.Nephrology Physician1922141241
- Jia Liu, M.D.Nephrology Physician1043282544
- Tin Maung, M.D.Nephrology Physician1033117908
- Kayana MesidorFamily Nurse Practitioner1497619225
Verify Mary A. Pieprzak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D50616Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average nephrology physician in 2024
265 Medicare Part D claims for 68 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Amlodipine Besylate37 claims
- Calcitriol31 claims
- Furosemide30 claims
- Potassium Chloride18 claims
- Lisinopril16 claims
- Prednisone14 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $168.15
7 payments; by number, the most common kind was education; the largest payer was AstraZeneca Pharmaceuticals LP. The 8,230 providers of this specialty with any payment received $3,091.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Mid-Atlantic Nephrology Associates PALaurel, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nephrology Physician providers in Maryland
There are 337 nephrology physician records in Maryland.
Other nephrology physician records in Maryland
- Hashim AbbasBaltimore, MD1396171070
- Kevin Abbott, MDBethesda, MD1730289133
- Hossam Abdalla, M.D.Glen Burnie, MD1285031765
- Marwa Abdalla, MBBSWaldorf, MD1851852768
- Jacques Abi Rached, MDBaltimore, MD1790920577
- Farah Abifaraj, MDBaltimore, MD1104352962
- Veena Acharya, MDBel Air, MD1285842211
- Rohini Adhikarla, M.DLutherville Timonium, MD1316146863
- Muzna Adil, M.D.Suitland, MD1780870618
- Harsha Adnani, MDAnnapolis, MD1437738838
Common questions
What is Mary A. Pieprzak, M.D.'s NPI number?
Mary A. Pieprzak, M.D.'s National Provider Identifier (NPI) is 1326046202, issued on Jul 13, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mary A. Pieprzak, M.D. located?
The NPPES record lists a practice address at 5999 Harpers Farm RD Ste W250, Columbia, MD, 21044. Phone: (410) 772-8822. Providers update this record themselves, so call before visiting.
How can I verify Mary A. Pieprzak, M.D.'s license?
NPPES lists Maryland license number D50616, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mary A. Pieprzak, M.D. prescribe under Medicare Part D?
In 2024, Mary A. Pieprzak, M.D. had 265 Medicare Part D claims for 68 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.