Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Reza Tadayon-Nejad, M.D., PH.D

Psychiatry Physician in Paramount, CA · enumerated 2011 · practices at Geropsychiatric Services, Inc.

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

National Provider Identifier

1326329012

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Registry record

Entity type Individual (Type 1)

Name Reza Tadayon-Nejad

Credential M.D., PH.D

Sex Male

Practice address 8835 Vans St, La Paz Geropsychiatric Center, Paramount, CA, 90723

Phone (562) 633-5111

Enumeration date Sep 8, 2011

Last updated in NPPES Dec 23, 2020

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License A137573 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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 Reza Tadayon-Nejad?

The National Provider Identifier (NPI) for Reza Tadayon-Nejad is 1326329012, a Type 1 (individual) record in the CMS NPPES registry.

Where does Reza Tadayon-Nejad practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-12-23.