Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Gabrielle Gruber, LMSW

Clinical Social Worker in Ann Arbor, MI · enumerated 2007.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1811103997

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Registry record

Entity type Individual (Type 1)

Name Gabrielle Gruber

Credential LMSW

Sex Female

Practice address Ann Arbor, MI, 48103

Phone (734) 645-8296

Enumeration date May 15, 2007

Last updated in NPPES Dec 27, 2022

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 6801085187 (MI) Primary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1811103997 active?

Yes, as of the latest NPPES snapshot, NPI 1811103997 is active (record last updated 2022-12-27).

How do I verify Gabrielle Gruber's NPI record?

Cross-check NPI 1811103997 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-12-27.