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

Dr. Judith Phillips Sill, PHD

Individual provider Psychologist · NPI 1881740025

Dr. Judith Phillips Sill, PHD is a Psychologist in Mendocino, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2007
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

See every abbreviation used in this directory →

Practice location Address checks out

45121 Ukiah St Ste G
Mendocino, CA 95460
Phone: (707) 937-3000
Fax: (707) 937-3373
Show map & directions

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

Specialties & licences

Psychologist (primary) Taxonomy 103T00000X · Licence PSY 7543 (CA)

Record details

NPI number1881740025
Entity typeIndividual (Type 1)
GenderFemale
Credentials PHD
Sole proprietorYes
NPI enumeratedJanuary 27, 2007
Last updated in NPPESDecember 13, 2013
Mailing addressPo Box 65, Elk, CA 95432-0065