John A. Chellsen, PH.D.
Clinical Psychologist · Stockton, CA
John A. Chellsen, PH.D. is a clinical psychologist with a practice address in Stockton, California, and NPI 1669403580, issued on Jul 6, 2006. Check the license (California PSY8979, 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.
- Name
- John A. Chellsen
- Credential
- PH.D.
- Primary taxonomy
- Clinical Psychologist 103TC0700X
- License number
- PSY8979 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2155 W March LN, Stockton, CA 95207
- Phone
- (209) 473-4211
- Enumerated
- Jul 6, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (209) 473-0610
- Medicare enrollment
- Enrolled (PECOS I20101110000351); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest clinical psychologist records → All 12,647 in California → Look up another NPI →
Also registered at 2155 W March LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Antonio Alcorta, BCOOcularist1811262413
- Kay Ecker, M.F.T.Marriage & Family Therapist1700975679
- Paula Evans, MFTMarriage & Family Therapist1346463163
Verify John A. Chellsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PSY8979Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
John A. Chellsen among 12,647 clinical psychologist records in California
John A. Chellsen, PH.D. is one of 12,647 clinical psychologist records with a practice address in California. 9% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 1% of them.
- NPI issued2006 · 1% of these records are older, 80% newer
- In a Medicare fileNo · 9% of these records are
- In the CMS Doctors and Clinicians fileYes · 19% of these records are
- Graduated1983 · median 2006 among the 2,424 with a school on file
- Record last updated2007 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103TC0700X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Clinical Psychologist providers in California
There are 12,647 clinical psychologist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 12,647 in California → Every provider in Stockton → Clinical Psychologist nationwide →
The 8 clinical psychologist records with the nearest ZIP codes
- Kimberlee Derushia, PSYDStockton, CA 952071437867769
- Timothy Miller, PH.D.Stockton, CA 952071528160041
- Sandra Angulo, PSY.D.Stockton, CA 952061265899827
- Georgia Bland, PH.D.Stockton, CA 952101730248543
- Robert Brownell, ED.D.Stockton, CA 952101841510609
- Ashley HillStockton, CA 952101790979540
- Melissa Keane, PHDStockton, CA 952101073091765
- Carolynn Kohn, PHD, BCBA-DStockton, CA 952041265008650
Common questions
What is John A. Chellsen, PH.D.'s NPI number?
John A. Chellsen, PH.D.'s National Provider Identifier (NPI) is 1669403580, issued on Jul 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John A. Chellsen, PH.D. located?
The NPPES record lists a practice address at 2155 W March LN, Stockton, CA, 95207. Phone: (209) 473-4211. Providers update this record themselves, so call before visiting.
How can I verify John A. Chellsen, PH.D.'s license?
NPPES lists California license number PSY8979, 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.