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

Sienna Mauve Gregan, AMFT

Individual provider Mental Health Counselor · NPI 1639648520

Sienna Mauve Gregan, AMFT is a Mental Health Counselor in Oakland, California. Licensed in California. Registered with an NPI since 2018.

Licensed in
CA
In the registry since
2018

Practice location Address checks out

2501 Harrison St
Oakland, CA 94612-3811
Phone: (415) 870-6968
Show map & directions

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

Specialties & licences

Mental Health Counselor (primary) Taxonomy 101YM0800X · Licence 103588 (CA)

Record details

NPI number1639648520
Entity typeIndividual (Type 1)
GenderFemale
Credentials AMFT
Sole proprietorNo
NPI enumeratedNovember 20, 2018
Last updated in NPPESNovember 20, 2018

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