Quick answers
- Which hospitals does Jan Zakrzewski work at?
- Medicare's official clinician data lists Jan Zakrzewski at 2 hospitals: Holy Cross Hospital and MedStar Washington Hospital Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Jan Zakrzewski see patients?
- Medicare's clinician data lists 1 practice location in Washington, DC. Call before your visit to confirm the address.
- What is Jan Zakrzewski's specialty?
- Medicare lists Infectious Disease as the primary specialty.
- Does Jan Zakrzewski accept Medicare assignment?
- Yes. Medicare's clinician data says Jan Zakrzewski accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Jan Zakrzewski?
- (202) 346-3000, as listed in official Medicare / NPI Registry data.
- What is Jan Zakrzewski's NPI number?
- 1063855328. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Jan Zakrzewski works
Medicare's Facility Affiliation Data lists Jan Zakrzewski at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Holy Cross HospitalSilver Spring, MD · Acute Care Hospital · CCN 210004
- MedStar Washington Hospital CenterWashington, DC · Acute Care Hospital · CCN 090011
Practice locations
Addresses where Jan Zakrzewski is enrolled with Medicare (CMS data updated 2026-10-02).
- 700 2nd St NEWashington, DC 20002 (202) 346‑3000
Group practices
Medicare enrollment lists Jan Zakrzewski as a member of this group (CMS data updated 2026-10-02).
- Kaiser Foundation Health Plan of the Mid Atlantic States, Inc1,899 clinicians in the group
Specialties
- Infectious Diseaseprimary
Find other Infectious Disease doctors in District of Columbia →
Other infectious disease doctors in Washington
Clinicians with the same Medicare primary specialty in Washington, DC — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of New York At Buffalo School Of Medicine |
| Graduation year | 2013 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1063855328 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians