Jan Zakrzewski, M.D.
Infectious Disease Physician · Upper Marlboro, MD
Jan Zakrzewski, M.D. is an infectious disease physician with a practice address in Upper Marlboro, Maryland, and NPI 1063855328, issued on Apr 16, 2013. Check the license (Maryland D85540, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Jan Zakrzewski
- Credential
- M.D.
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- D85540 MD
Self-reported in NPPES; status is on the state search - Practice location
- 1221 Mercantile LN, Upper Marlboro, MD 20774
- Phone
- (301) 618-5647
- Enumerated
- Apr 16, 2013
- Record last updated
- May 28, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (301) 618-5504
- Medicare enrollment
- Enrolled (PECOS I20180717001694); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Buffalo School Of Medicine, 2013
- Entity
- Type 1 · individual
Also registered at 1221 Mercantile LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Isabella Ahanogbe, M.D.Family Medicine Physician1821381849
- Folabomi Ajanaku, M.D.Gastroenterology Physician1851719777
- Jacqueline Arthur-Baidoo, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1235810276
- David Auh, MDFamily Medicine Physician1356752588
- Olufemi Balogun, MDFamily Medicine Physician1194010678
- Folasade Bangali, DPTPhysical Therapist1811394091
Verify Jan Zakrzewski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D85540Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3% fewer Medicare Part D claims than the average infectious disease physician in 2024
666 Medicare Part D claims for 109 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 64% of claims.
Most prescribed
- Biktarvy160 claims
- Genvoya41 claims
- Triumeq40 claims
- Prezcobix36 claims
- Odefsey27 claims
- Atorvastatin Calcium25 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.
Bills Medicare through one group practice
- Kaiser Foundation Health Plan OF The Mid Atlantic States, IncWashington, DC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Infectious Disease Physician providers in Maryland
There are 410 infectious disease physician records in Maryland.
Other infectious disease physician records in Maryland
- Shastine Abate, MDBaltimore, MD1922199405
- Mark AbbruzzeseBethesda, MD1154310035
- Michael Abers, MDBethesda, MD1437562378
- Adrian Aceves-Hurtado, DOBethesda, MD1043708324
- Ademiposi Adegbulugbe, M.DCheverly, MD1942467386
- Brian Agan, M.D.Bethesda, MD1669434718
- Gloria Aggrey, MDRockville, MD1588839286
- Mohamed Al-Ibrahim, M.D.Baltimore, MD1245334325
- Carla Alexander, M.D.Baltimore, MD1134177793
- Maria AllendeGaithersburg, MD1245500370
Common questions
What is Jan Zakrzewski, M.D.'s NPI number?
Jan Zakrzewski, M.D.'s National Provider Identifier (NPI) is 1063855328, issued on Apr 16, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Jan Zakrzewski, M.D. located?
The NPPES record lists a practice address at 1221 Mercantile LN, Upper Marlboro, MD, 20774. Phone: (301) 618-5647. Providers update this record themselves, so call before visiting.
How can I verify Jan Zakrzewski, M.D.'s license?
NPPES lists Maryland license number D85540, 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 Jan Zakrzewski, M.D. prescribe under Medicare Part D?
In 2024, Jan Zakrzewski, M.D. had 666 Medicare Part D claims for 109 beneficiaries; the average among infectious disease physician prescribers was 689. 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.