Katherine Y. Ko, PH.D. & Associates, a Psychological Association
NPI 1265459911 · Clinical Psychologist · Irvine, CA
Katherine Y. Ko, PH.D. & Associates, a Psychological Association is a Clinical Psychologist organization in Irvine, CA (NPI 1265459911).
Provider details
- NPI number
- 1265459911
- Entity type
- Organization
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Organization subpart
- No
- Authorized official
- Katherine Ko, President(949) 262-3696
- License
- PSY18545 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Other names (DBA / former)
- Doing business as
- Perfect Harmony, Inc.
Registry dates
- Enumerated
- 2006-07-17
- Last updated
- 2020-08-22
Frequently asked questions
- What is Katherine Y. Ko, PH.D. & Associates, a Psychological Association's NPI number?
- Katherine Y. Ko, PH.D. & Associates, a Psychological Association's National Provider Identifier (NPI) is 1265459911, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Katherine Y. Ko, PH.D. & Associates, a Psychological Association?
- Katherine Y. Ko, PH.D. & Associates, a Psychological Association is classified in the NPPES registry as Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Katherine Y. Ko, PH.D. & Associates, a Psychological Association located?
- Katherine Y. Ko, PH.D. & Associates, a Psychological Association's practice location on file with NPPES is 4000 Barranca Pkwy Ste 250, Irvine, CA 92604-1713.
- What is Katherine Y. Ko, PH.D. & Associates, a Psychological Association's phone number?
- The practice phone number listed in the NPPES registry for Katherine Y. Ko, PH.D. & Associates, a Psychological Association is (949) 262-3696.
- Who is the authorized official for Katherine Y. Ko, PH.D. & Associates, a Psychological Association?
- The authorized official listed on Katherine Y. Ko, PH.D. & Associates, a Psychological Association's NPPES record is Katherine Ko, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Katherine Y. Ko, PH.D. & Associates, a Psychological Association's NPI active?
- Yes — Katherine Y. Ko, PH.D. & Associates, a Psychological Association's NPI (1265459911) is active in the NPPES registry as of the last update on 2020-08-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.