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

Mr. William J Leemaster, LCSW

Individual provider Clinical Social Worker · NPI 1245357821

Mr. William J Leemaster, LCSW is a Clinical Social Worker in San Francisco, California. Qualified in 1993, 33 years ago. Practices with City and County of San Francisco, a 369-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
33
Licensed in
CA
In the registry since
2007
What do these letters mean?
LCSW — Licensed Clinical Social Worker
A social worker licensed to diagnose and treat mental health conditions independently.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

1060 Howard St 3rd Fl
San Francisco, CA 94103-2820
Phone: (415) 865-5250
Fax: (415) 863-4867
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence LCS 19223 (CA)

Record details

NPI number1245357821
Entity typeIndividual (Type 1)
GenderMale
Credentials LCSW
Sole proprietorNo
NPI enumeratedMarch 26, 2007
Last updated in NPPESOctober 5, 2009

Medicare enrollment

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

Medicare specialtyCLINICAL SOCIAL WORKER
Medical schoolOTHER
Graduated 1993 (33 years in practice)
Group practice City And County Of San Francisco — 369 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

Other providers in San Francisco