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Jonathan Grayson, PH.D.
NPI 1346350378 · Psychologist · Pasadena, CA
Jonathan Grayson, PH.D. is a Psychologist provider in Pasadena, CA (NPI 1346350378).
Provider details
- NPI number
- 1346350378
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- PS003671L (PA)
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
4 E Holly St Ste 219
Pasadena, CA 91103-4519
Phone: (626) 639-3994
Street-level locationGet directions
Mailing address
155 Cordova St Unit 304
Pasadena, CA 91105-2749
Registry dates
- Enumerated
- 2006-08-31
- Last updated
- 2021-10-20
- Certified
- 2021-10-20
Frequently asked questions
- What is Jonathan Grayson's NPI number?
- Jonathan Grayson's National Provider Identifier (NPI) is 1346350378, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jonathan Grayson's specialty?
- Jonathan Grayson is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Jonathan Grayson located?
- Jonathan Grayson's practice location on file with NPPES is 4 E Holly St Ste 219, Pasadena, CA 91103-4519.
- What is Jonathan Grayson's phone number?
- The practice phone number listed in the NPPES registry for Jonathan Grayson is (626) 639-3994.
- Is Jonathan Grayson's NPI active?
- Yes — Jonathan Grayson's NPI (1346350378) is active in the NPPES registry as of the last update on 2021-10-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.