Linda J. Trettin, PH.D.
Clinical Psychologist · Folsom, CA
Linda J. Trettin, PH.D. is a clinical psychologist with a practice address in Folsom, California, and NPI 1356669287, issued on May 17, 2010. Check the license (California PSY23452, 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
- Linda J. Trettin
- Credential
- PH.D.
- Primary taxonomy
- Clinical Psychologist 103TC0700X
- License number
- PSY23452 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9580 Oak Avenue Pkwy Ste 7, Folsom, CA 95630
- Phone
- (916) 399-3961
- Enumerated
- May 17, 2010
- Record last updated
- Mar 19, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (833) 968-1890
- Medicare enrollment
- Enrolled (PECOS I20160429001472); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest clinical psychologist records → All 12,647 in California → Look up another NPI →
Also registered at 9580 Oak Avenue Pkwy Ste 7
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Linda J. Trettin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PSY23452Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Linda J. Trettin among 12,647 clinical psychologist records in California
Linda J. Trettin, 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 2010, is newer than 54% of them.
- NPI issued2010 · 54% of these records are older, 41% newer
- In a Medicare fileNo · 9% of these records are
- In the CMS Doctors and Clinicians fileYes · 19% of these records are
- Graduated2007 · median 2006 among the 2,424 with a school on file
- Record last updated2021 · 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).
28 clinical psychologist records list a practice address in Folsom
They are 28 of the 1,811 NPPES records with a practice address in Folsom, and 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 Folsom → Clinical Psychologist nationwide →
The 8 clinical psychologist records with the nearest ZIP codes
- Lisa Barry, PSY.D.Folsom, CA 956301659600252
- Nicolette Bautista, PSY.D.Folsom, CA 956301932430212
- Scott BrandtFolsom, CA 956301871718015
- Marcia Hillary, PHDFolsom, CA 956301174793756
- Jenifer Jacobs, PH.D.Folsom, CA 956301922135185
- Katherine Kilgore, PHDFolsom, CA 956301932210481
- Roxie Massey, PH.D.Folsom, CA 956301851417166
- Carrie Rogers, PSY.D.Folsom, CA 956301023262334
Common questions
What is Linda J. Trettin, PH.D.'s NPI number?
Linda J. Trettin, PH.D.'s National Provider Identifier (NPI) is 1356669287, issued on May 17, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Linda J. Trettin, PH.D. located?
The NPPES record lists a practice address at 9580 Oak Avenue Pkwy Ste 7, Folsom, CA, 95630. Phone: (916) 399-3961. Providers update this record themselves, so call before visiting.
How can I verify Linda J. Trettin, PH.D.'s license?
NPPES lists California license number PSY23452, 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.