Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Oscar Oo, PSY.D.

Q: What is the NPI number for Oscar Oo?

The National Provider Identifier (NPI) for Oscar Oo is 1427128156, a Type 1 (individual) record in the CMS NPPES registry.

Clinical Psychologist in Newport Beach, CA · enumerated 2006.

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

National Provider Identifier

1427128156

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Registry record

Entity type Individual (Type 1)

Name Dr. Oscar Oo

Credential PSY.D.

Sex Male

Practice address 4000 Macarthur Blvd, Suite 600, East Tower, Newport Beach, CA, 92660

Phone (949) 648-3704

Fax (714) 352-6471

Enumeration date Nov 9, 2006

Last updated in NPPES Jan 11, 2017

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PSY22699 (CA) Primary

PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice. About the PSYD credential

Other identifiers

Identifier	Type	State	Issuer
CS098A	Other	CA	MEDICARE PTAN

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 Oscar Oo?

The National Provider Identifier (NPI) for Oscar Oo is 1427128156, a Type 1 (individual) record in the CMS NPPES registry.

Where does Oscar Oo practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-01-11.