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

Samuel Massion

Individual provider Hospitalist Physician · NPI 1821793654

Samuel Massion is a Hospitalist in San Francisco, California. Qualified in 2023, 3 years ago. Licensed in California.

Years since qualifying
3
Licensed in
CA
In the registry since
2023
Specialties on file
2
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Practice location Address checks out

505 Parnassus Ave
San Francisco, CA 94143-2204
Phone: (415) 476-1528
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence A201779 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence A201779 (CA)

Record details

NPI number1821793654
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedApril 3, 2023
Last updated in NPPESMay 20, 2026
Certification dateMay 20, 2026

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2023 (3 years in practice)
Accepts Medicare assignment Not indicated

Other providers in San Francisco