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

May Yen Yau, MD

Individual provider Internal Medicine Physician · NPI 1689786675

May Yen Yau, MD is an Internal Medicine in San Francisco, California. Qualified in 1989, 37 years ago. Practices with Pacific Internal Medicine Associates, a 5-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
37
Licensed in
CA
In the registry since
2006
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

2100 Webster St Ste 423
San Francisco, CA 94115-2380
Phone: (415) 923-3179
Fax: (415) 563-4687
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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 G70229 (CA)

Record details

NPI number1689786675
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 31, 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 schoolOTHER
Graduated 1989 (37 years in practice)
Group practice Pacific Internal Medicine Associates — 5 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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