Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Mary Bryson Piechowiak, MD

Individual provider Internal Medicine Physician · NPI 1033603824

Mary Bryson Piechowiak, MD is a Hospitalist in Falls Church, Virginia. Graduated from George Washington University School of Medicine in 2018, 8 years ago. Practices with Inova Health Care Services, a 1,827-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California and Virginia.

Years since qualifying
8
Trained at
George Washington University School of Medicine
Licensed in
CA, VA
In the registry since
2018
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

3300 Gallows Rd
Falls Church, VA 22042-3307
Phone: (703) 776-4001
Fax: (703) 776-7113
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1600 N Rose Ave, Oxnard, CA 93030-3722 — (805) 988-2505

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A173484 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 0101277234 (VA)

Record details

NPI number1033603824
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 15, 2018
Last updated in NPPESMarch 24, 2023
Certification dateMarch 24, 2023

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHOSPITALIST
Also practisesINTERNAL MEDICINE
Medical schoolGEORGE WASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 2018 (8 years in practice)
Group practice Inova Health Care Services — 1827 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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