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

Ethan M Grumbach, PHD

Individual provider Clinical Social Worker · NPI 1104955681

Ethan M Grumbach, PHD is a Clinical Social Worker in Los Angeles, 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

948 S Citrus Ave
Los Angeles, CA 90036-4929
Phone: (323) 933-3536
Fax: (323) 937-4070
Show map & directions

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

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence LCS19239 (CA)

Record details

NPI number1104955681
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedMarch 2, 2007
Last updated in NPPESJuly 8, 2007

Other providers in Los Angeles