Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Katherine A Major, RN

Psychiatric/Mental Health Registered Nurse in San Diego, CA · enumerated 2006 · practices at P.E.R.T Incorporated.

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

National Provider Identifier

1659447894

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Registry record

Entity type Individual (Type 1)

Name Mrs. Katherine A Major

Credential RN

Sex Female

Practice address 1094 Cudahy Pl, Suite 314, San Diego, CA, 92110

Phone (619) 276-8112

Fax (619) 276-8230

Enumeration date Nov 28, 2006

Last updated in NPPES Mar 16, 2011

Taxonomy & licenses

163WP0808X Psychiatric/Mental Health Registered Nurse Nursing Service Providers · License 237374 (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

What is the NPI number for Katherine Major?

The National Provider Identifier (NPI) for Katherine Major is 1659447894, a Type 1 (individual) record in the CMS NPPES registry.

Where does Katherine Major practice?

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

Other providers at this practice address

Browse all →

Michael Hammer Clinical Social Worker · San Diego, CA NPI 1861491292 Robert Ledermann Clinical Social Worker · San Diego, CA NPI 1962418111 Gary Wenk Clinical Social Worker · San Diego, CA NPI 1255438909 Mariya Kholodova Psychologist · San Diego, CA NPI 1356416663 Christine Davies Marriage & Family Therapist · San Diego, CA NPI 1083789622 Pamela Kulbarsh Psychiatric/Mental Health Registered Nurse · San Diego, CA NPI 1467527796 Demetri Coffin Clinical Psychologist · San Diego, CA NPI 1871668749 James Fix Psychologist · San Diego, CA NPI 1194872762

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-03-16.