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

Dr. Christina O'Sullivan, JD, PHD

Forensic Psychologist in Orange, CA · enumerated 2011.

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

National Provider Identifier

1831486000

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Registry record

Entity type Individual (Type 1)
Name Dr. Christina O'Sullivan
Credential JD, PHD
Sex Female
Practice address Orange, CA, 92867
Phone (559) 498-8265
Enumeration date Jul 7, 2011
Last updated in NPPES Sep 14, 2012

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

Taxonomy & licenses

103TF0200X Forensic Psychologist Behavioral Health & Social Service Providers · License PSY24233 (CA) Primary
PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD 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.

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Frequently asked questions

What is the NPI number for Christina O'Sullivan?
The National Provider Identifier (NPI) for Christina O'Sullivan is 1831486000, a Type 1 (individual) record in the CMS NPPES registry.
Where does Christina O'Sullivan practice?
The practice location on file with NPPES is in Orange, 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 2012-09-14.