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

MS. Josefina Sierra

Individual provider Clinical Social Worker · NPI 1063781128

MS. Josefina Sierra is a Clinical Social Worker in Ontario, California. Licensed in California. Registered with an NPI since 2011.

Licensed in
CA
In the registry since
2011

Practice location Address checks out

317 W F St
Ontario, CA 91762-3205
Phone: (909) 986-7111
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 LCS 15702 (CA)

Record details

NPI number1063781128
Entity typeIndividual (Type 1)
GenderFemale
Sole proprietorNo
NPI enumeratedDecember 19, 2011
Last updated in NPPESDecember 19, 2011

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