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

John Stephen Sowinski, MD

Individual provider Diagnostic Radiology Physician · NPI 1881190627

John Stephen Sowinski, MD is a Diagnostic Radiology in San Francisco, California. Graduated from Indiana University School of Medicine in 2018, 8 years ago. Practices with Southeastern Regional Medical Center, a 49-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California and North Carolina.

Years since qualifying
8
Trained at
Indiana University School of Medicine
Licensed in
CA, NC
In the registry since
2018
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

505 Parnassus Ave
San Francisco, CA 94143-2204
Phone: (415) 502-2673
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1001 Potrero Avenue, San Francisco, CA 94110 — (628) 206-8020

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence A187039 (CA)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence 2026-00784 (NC)

Record details

NPI number1881190627
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 2, 2018
Last updated in NPPESMarch 19, 2026
Certification dateMarch 19, 2026

Medicare enrollment

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

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolINDIANA UNIVERSITY SCHOOL OF MEDICINE
Graduated 2018 (8 years in practice)
Group practice Southeastern Regional Medical Center — 49 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

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