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

Marilynn Walker, RN

Adult Psychiatric/Mental Health Registered Nurse in Fresno, CA · enumerated 2007.

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

National Provider Identifier

1578752507

Verified

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Registry record

Entity type Individual (Type 1)

Name Marilynn Walker

Credential RN

Sex Female

Practice address Fresno, CA, 93702

Phone (559) 453-6304

Fax (559) 453-8944

Enumeration date Oct 16, 2007

Last updated in NPPES Oct 16, 2007

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

Taxonomy & licenses

163WP0809X Adult Psychiatric/Mental Health Registered Nurse Nursing Service Providers · License 614525 (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 Marilynn Walker practice?

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

What is the NPI number for Marilynn Walker?

The National Provider Identifier (NPI) for Marilynn Walker is 1578752507, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-10-16.