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

Barbara Ruth Mclain, NP

Adult Health Nurse Practitioner in Larkspur, CA · enumerated 2011 · practices at By the Bay Health.

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

National Provider Identifier

1376832022

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Registry record

Entity type Individual (Type 1)

Name Barbara Ruth Mclain

Credential NP

Sex Female

Practice address Larkspur, CA, 94939

Phone (415) 526-5538

Fax (415) 925-9557

Enumeration date Apr 4, 2011

Last updated in NPPES Apr 4, 2011

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

Taxonomy & licenses

363LA2200X Adult Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 298596 (CA) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP credential

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

How do I verify Barbara Mclain's NPI record?

Cross-check NPI 1376832022 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1376832022 active?

Yes, as of the latest NPPES snapshot, NPI 1376832022 is active (record last updated 2011-04-04).

Other providers at this practice address

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By the Bay Health Community Based Hospice Care Agency · Larkspur, CA NPI 1255381547 Julie Freedman Hospitalist Physician · Larkspur, CA NPI 1033206891 Christine Watkins Clinical Social Worker · Larkspur, CA NPI 1174719454 Carolyn Holmes Clinical Social Worker · Larkspur, CA NPI 1245419522 Carol Schlesinger Clinical Social Worker · Larkspur, CA NPI 1366770257 Maureen Clearfield Clinical Social Worker · Larkspur, CA NPI 1942524491 Michele Senbertrand Adult Health Nurse Practitioner · Larkspur, CA NPI 1467754879 Teresa Simi Nurse Practitioner · Larkspur, CA NPI 1336447911

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-04-04.