Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Marsha Ann Larson, RN

Psychiatric/Mental Health Nurse Practitioner in Los Banos, CA · enumerated 2007.

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

National Provider Identifier

1295858249

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Registry record

Entity type Individual (Type 1)

Name Mrs. Marsha Ann Larson

Credential RN

Sex Female

Practice address 40 G. St, B, Los Banos, CA, 93635

Phone (209) 710-6100

Fax (209) 827-2009

Enumeration date Apr 6, 2007

Last updated in NPPES May 31, 2011

Taxonomy & licenses

163WP0808X Psychiatric/Mental Health Registered Nurse Nursing Service Providers · License RN336299 (CA) Secondary

363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 19269 (CA) Primary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN 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

Where does Marsha Larson practice?

The practice location on file with NPPES is in Los Banos, CA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Marsha Larson?

The National Provider Identifier (NPI) for Marsha Larson is 1295858249, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-05-31.