Katherine L. Possin, PH.D.
Clinical Psychologist · San Francisco, CA
Katherine L. Possin, PH.D. is a clinical psychologist with a practice address in San Francisco, California, and NPI 1275848251, issued on Aug 13, 2010. Check the license (California PSY 23543, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Katherine L. Possin
- Credential
- PH.D.
- Primary taxonomy
- Clinical Psychologist 103TC0700X
- License number
- PSY 23543 CA
Self-reported in NPPES; status is on the state search - Practice location
- 350 Parnassus Ave., Ste 905, San Francisco, CA 94143
- Phone
- (415) 476-1889
- Enumerated
- Aug 13, 2010
- Record last updated
- Aug 13, 2010 (not updated in 16 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20101110000953); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest clinical psychologist records → All 12,647 in California → Look up another NPI →
Verify Katherine L. Possin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PSY 23543Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 74.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- University OF California San FranciscoSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine L. Possin among 12,647 clinical psychologist records in California
Katherine L. Possin, 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. Its NPI, issued in 2010, is newer than 54% of them.
- NPI issued2010 · 54% of these records are older, 41% newer
- In a Medicare fileYes · 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 updated2010 · 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).
802 clinical psychologist records list a practice address in San Francisco
They are 802 of the 38,143 NPPES records with a practice address in San Francisco, and 12,647 clinical psychologist records in California.
All 12,647 in California → Every provider in San Francisco → Clinical Psychologist nationwide →
The 8 clinical psychologist records with the nearest ZIP codes
- Patricia Arean, PH.D.San Francisco, CA 941431841338951
- Regina Armas, LCSW, PH.D.San Francisco, CA 941431730118217
- Linda Centore, PHD, RNSan Francisco, CA 941431831242171
- Sharon Hall, PH.D.San Francisco, CA 941431356350698
- Laura Julian, PH.D.San Francisco, CA 941431174617690
- Paul Lebby, PH.D.San Francisco, CA 941431649207879
- Beverly Lehr, PHDSan Francisco, CA 941431114975455
- Rachel Loewy, PH.D.San Francisco, CA 941431396925822
Common questions
What is Katherine L. Possin, PH.D.'s NPI number?
Katherine L. Possin, PH.D.'s National Provider Identifier (NPI) is 1275848251, issued on Aug 13, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Katherine L. Possin, PH.D. located?
The NPPES record lists a practice address at 350 Parnassus Ave., Ste 905, San Francisco, CA, 94143. Phone: (415) 476-1889. Providers update this record themselves, so call before visiting.
How can I verify Katherine L. Possin, PH.D.'s license?
NPPES lists California license number PSY 23543, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
What is Katherine L. Possin, PH.D.'s MIPS final score?
The 2023 MIPS final score is 74.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. 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.