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Gerald O'Day, PH.D.
NPI 1487737235 · Clinical Psychologist · Arcadia, CA
Gerald O'Day, PH.D. is a Clinical Psychologist provider in Arcadia, CA (NPI 1487737235).
Provider details
- NPI number
- 1487737235
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 16011 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(90/100 index)
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
330 E Live Oak Ave
Arcadia, CA 91006-5617
Phone: (626) 821-5890
Street-level locationGet directions
Mailing address
3456 Deerlane Dr
Duarte, CA 91010-1624
Registry dates
- Enumerated
- 2006-10-23
- Last updated
- 2007-07-08
Frequently asked questions
- What is Gerald O'Day's NPI number?
- Gerald O'Day's National Provider Identifier (NPI) is 1487737235, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gerald O'Day's specialty?
- Gerald O'Day is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Gerald O'Day located?
- Gerald O'Day's practice location on file with NPPES is 330 E Live Oak Ave, Arcadia, CA 91006-5617.
- What is Gerald O'Day's phone number?
- The practice phone number listed in the NPPES registry for Gerald O'Day is (626) 821-5890.
- Is Gerald O'Day's NPI active?
- Yes — Gerald O'Day's NPI (1487737235) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.