NPPES file of Aug 9, 2026

Douglas Christian Johnson, PH.D.

Clinical Neuropsychologist · La Jolla, CA

Douglas Christian Johnson, PH.D. is a clinical neuropsychologist with a practice address in La Jolla, California, and NPI 1770788697, issued on Jun 20, 2007. Check the license (California PSY21975, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1770788697
Name
Douglas Christian Johnson
Credential
PH.D.
Primary taxonomy
Clinical Neuropsychologist 103G00000X
License number
PSY21975 CA
Self-reported in NPPES; status is on the state search
Practice location
8939 Villa LA Jolla Dr, La Jolla, CA 92037
Phone
(858) 999-4287
Enumerated
Jun 20, 2007
Record last updated
Feb 6, 2013 (not updated in 13 years: call before relying on the address or phone)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 8939 Villa LA Jolla Dr

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Edward Brown, MDInternal Medicine Physician1942313200
  2. Melinda Chen, MDInternal Medicine Physician1942396197
  3. Carmella Fitzpatrick, LVNLicensed Vocational Nurse1477796894
  4. Courtney Hanson, MDInternal Medicine Physician1609004191
  5. Heather Hofflich, DOEndocrinology, Diabetes & Metabolism Physician1598962102
  6. Renu Singh, PHARM.D.Pharmacotherapy Pharmacist1124339627

Verify Douglas Christian Johnson in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license PSY21975
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
Find the California license search

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Clinical Neuropsychologist providers in California

There are 743 clinical neuropsychologist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

Other clinical neuropsychologist records in California

  1. Richard Abbey, PH.D.Palo Alto, CA1730377649
  2. Jennifer Acogny, PSY.D.Beverly Hills, CA1841707643
  3. Jennifer Adler, PHDSan Diego, CA1164314753
  4. Kristina Agbayani, PH.D.Palo Alto, CA1174974125
  5. Maral AghvinianLos Angeles, CA1588545685
  6. Cynthia Aguilar, PSY.DLos Angeles, CA1114474699
  7. Charles AhernCarmel, CA1083336200
  8. Natacha Akshoomoff, PH.D.San Diego, CA1740315043
  9. Lori Alasantro, PHDCarlsbad, CA1669807111
  10. Kimberly Alfano, PHDSanta Barbara, CA1326068115

Common questions

What is Douglas Christian Johnson, PH.D.'s NPI number?

Douglas Christian Johnson, PH.D.'s National Provider Identifier (NPI) is 1770788697, issued on Jun 20, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Douglas Christian Johnson, PH.D. located?

The NPPES record lists a practice address at 8939 Villa LA Jolla Dr, La Jolla, CA, 92037. Phone: (858) 999-4287. Providers update this record themselves, so call before visiting.

How can I verify Douglas Christian Johnson, PH.D.'s license?

NPPES lists California license number PSY21975, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.