Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Katherine Ko, PH.D.
Clinical Psychologist in Irvine, CA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1871524546
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Registry record
Entity type Individual (Type 1)
Name Dr. Katherine Ko
Credential PH.D.
Sex Female
Practice address 4000 Barranca Pkwy Ste 250, Irvine, CA, 92604
Phone (949) 262-3696
Fax (949) 262-3299
Enumeration date Jul 5, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PSY18545 (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.
Frequently asked questions
What is the NPI number for Katherine Ko?
The National Provider Identifier (NPI) for Katherine Ko is 1871524546, a Type 1 (individual) record in the CMS NPPES registry.
Where does Katherine Ko practice?
The practice location on file with NPPES is in Irvine, CA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Katherine Y. Ko, Ph.D. & Associates, A Psychological Association Clinical Psychologist · Irvine, CA NPI 1265459911 Badri Moghadam Family Psychologist · Irvine, CA NPI 1932219318 Humberto Hernandez Psychologist · Irvine, CA NPI 1104104249 Ta Shing Yang Acupuncturist · Irvine, CA NPI 1023553567 Vitality Integrative Physicians Critical Care Medicine (Internal Medicine) Physician · Irvine, CA NPI 1194208322 Vitality Integrative Physicians Critical Care Medicine (Internal Medicine) Physician · Irvine, CA NPI 1174090856 Sheherezad Shashaani Marriage & Family Therapist · Irvine, CA NPI 1124640040 Vitality Integrative Wellness Internal Medicine Physician · Irvine, CA NPI 1407456825
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.