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

Dr. Joshua Rassen

Individual provider Internal Medicine Physician · NPI 1902885510

Dr. Joshua Rassen practises Internal Medicine in San Francisco, California. Graduated from Washington University School of Medicine in 1973, 53 years ago. Practices as a sole proprietor. Licensed in California.

Years since qualifying
53
Trained at
Washington University School of Medicine
Licensed in
CA
In the registry since
2006
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Practice location Address checks out

700 25th Ave
San Francisco, CA 94121-3612 Not confirmed with CMS for 19 years — call before visiting
Phone: (415) 751-1446
Fax: (415) 752-6312
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence G27677 (CA)

Record details

NPI number1902885510
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorYes
NPI enumeratedJanuary 11, 2006
Last updated in NPPESJuly 8, 2007

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolWASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1973 (53 years in practice)
Accepts Medicare assignment Not indicated

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 patients20
Services billed 63 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

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.

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