Provider Profile

Grethel Leff, ASW

Unclaimed Profile

About Grethel Leff

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Specialty

Clinical Social Worker (Primary)

Credentials & Licensing

CA license28974
NPI1851692842
NPI issued11/08/2010

License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.

Common questions

What does Grethel Leff specialize in?

Grethel Leff is a clinical social worker in Pleasanton, CA. That is the designation recorded for this NPI in the federal registry.

NPI registry

Where is Grethel Leff located?

Grethel Leff is listed at 5354 Case Ave # 920, Pleasanton, CA 94566. Addresses come from the NPI registry and can lag a move, so confirm before travelling.

NPI registry

What is Grethel Leff's phone number?

The number on file is (925) 895-2661. Guide.md cannot book appointments or pass on messages — please call the office directly.

NPI registry

What is Grethel Leff's NPI number?

Grethel Leff's National Provider Identifier is 1851692842. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.

NPI registry

How long has Grethel Leff been practicing?

Grethel Leff has 16+ years experience. Registered with an NPI since 2010. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.

NPI registry

Has Grethel Leff confirmed this information?

Not yet. This profile is built from public federal data and has not been confirmed by Grethel Leff. If this is you, claiming it is free.

Guide.md

Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.