What is Grethel Leff's NPI number?

Grethel Leff's National Provider Identifier (NPI) is 1851692842, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Grethel Leff's specialty?

Grethel Leff is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).

Where is Grethel Leff located?

Grethel Leff's practice location on file with NPPES is 5354 Case Ave, Pleasanton, CA 94566-8019.

What is Grethel Leff's phone number?

The practice phone number listed in the NPPES registry for Grethel Leff is (925) 895-2661.

Is Grethel Leff's NPI active?

Yes — Grethel Leff's NPI (1851692842) is active in the NPPES registry as of the last update on 2010-12-13.

IndividualActive

Grethel Leff, ASW

NPI 1851692842 · Clinical Social Worker · Pleasanton, CA

Grethel Leff, ASW is a Clinical Social Worker provider in Pleasanton, CA (NPI 1851692842).

Provider details

NPI number: 1851692842
Entity type: Individual
Primary specialty: Clinical Social WorkerBehavioral Health & Social Service Providers
Credential: ASW
Sex: Female
Sole proprietor: No
License: 28974 (CA)

Specialties & taxonomies

Clinical Social WorkerPrimary1041C0700XLicense 28974 (CA)
Behavioral Health & Social Service Providers

Profile Score

Detailed profile(82/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
15 yrs in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
1 documented practice location

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Practice location

5354 Case Ave

# 920

Pleasanton, CA 94566-8019

Phone: (925) 895-2661

Street-level locationGet directions

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Mailing address