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

Justin Tien, MD

Individual provider Internal Medicine Physician · NPI 1609370345

Justin Tien, MD practises Internal Medicine in San Francisco, California. Qualified in 2018, 8 years ago. Practices with University of California Sfgh Medical Group, a 571-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
8
Licensed in
CA
In the registry since
2018
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) 476-1000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1001 Potrero Avenue, #0862, San Francisco, CA 94110 — (415) 514-9256

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A173600 (CA)

Record details

NPI number1609370345
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 19, 2018
Last updated in NPPESSeptember 19, 2025
Certification dateSeptember 19, 2025

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2018 (8 years in practice)
Group practice University Of California Sfgh Medical Group — 571 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients116
Services billed 332 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at University of California Sfgh Medical Group

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 571 clinicians in the practice; 12 are shown here.

Other providers in San Francisco