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

Dr. Deidre Elizabeth Williams, MD

Individual provider Geriatric Psychiatry Physician · NPI 1366604209

Dr. Deidre Elizabeth Williams, MD is a Geriatric Psychiatry Physician in Cupertino, California. Licensed in California. Registered with an NPI since 2008.

Licensed in
CA
In the registry since
2008
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

19000 Homestead Rd Bldg 2
Cupertino, CA 95014-0712
Phone: (408) 366-4400
Fax: (408) 366-4405
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence A106036 (CA)
Geriatric Psychiatry Physician Taxonomy 2084P0805X · Licence A106036 (CA)

Record details

NPI number1366604209
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 1, 2008
Last updated in NPPESJanuary 10, 2022