NPPES file of Aug 9, 2026

Katherine Shadish, PHD

Clinical Psychologist · San Mateo, CA

Katherine Shadish, PHD is a clinical psychologist with a practice address in San Mateo, California, and NPI 1336589043, issued on Jun 26, 2013. Check the license (California 30634, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.

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

NPPES recordNPPES file of Aug 9, 2026
1336589043
Name
Katherine Shadish
Credential
PHD
Primary taxonomy
Clinical Psychologist 103TC0700X
License number
30634 CA
Self-reported in NPPES; status is on the state search
Practice location
222 W 39TH Ave, San Mateo, CA 94403
Phone
(408) 975-2730
Enumerated
Jun 26, 2013
Record last updated
Jan 15, 2019 (not updated in 7 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20190228000756); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest clinical psychologist records → All 12,647 in California → Look up another NPI →

Also registered at 222 W 39TH Ave

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

  1. Jesse Adams, M.D.Psychiatry Physician1407143399
  2. Stacey Adelson, NPNurse Practitioner1104951797
  3. Brita Almog, MDPediatrics Physician1033402847
  4. John Anderson, MDObstetrics & Gynecology Physician1013082429
  5. Shea AndersonClinical Social Worker1689964991
  6. Zohra Ansari, MSWClinical Social Worker1326462904

Verify Katherine Shadish 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 30634    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

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. County OF San MateoSan Mateo, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Katherine Shadish among 12,647 clinical psychologist records in California

Katherine Shadish, PHD 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 2013, is newer than 67% of them.

  • NPI issued2013 · 67% of these records are older, 29% newer
  • In a Medicare fileYes · 9% of these records are
  • In the CMS Doctors and Clinicians fileYes · 19% of these records are
  • Graduated2017 · median 2006 among the 2,424 with a school on file
  • Record last updated2019 · 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).

65 clinical psychologist records list a practice address in San Mateo

They are 65 of the 3,909 NPPES records with a practice address in San Mateo, and 12,647 clinical psychologist records in California.

All 12,647 in California → Every provider in San Mateo → Clinical Psychologist nationwide →

The 8 clinical psychologist records with the nearest ZIP codes

  1. Lauren Allerhand, PSY.D.San Mateo, CA 944031346763067
  2. Ernestina Araiza, PSY.D.San Mateo, CA 944031568608636
  3. Sherri BurwellSan Mateo, CA 944031750417085
  4. Courtney Farmer, PH.D.San Mateo, CA 944031336690924
  5. Raisa GarciaSan Mateo, CA 944031770918005
  6. Daniele Levy, PHDSan Mateo, CA 944031902166465
  7. Wei Lew, PH.D.San Mateo, CA 944031427134733
  8. Jazmin Llamas, PHDSan Mateo, CA 944031972081933

Common questions

What is Katherine Shadish, PHD's NPI number?

Katherine Shadish, PHD's National Provider Identifier (NPI) is 1336589043, issued on Jun 26, 2013. An NPI identifies a provider in billing; it is not a license.

Where is Katherine Shadish, PHD located?

The NPPES record lists a practice address at 222 W 39TH Ave, San Mateo, CA, 94403. Phone: (408) 975-2730. Providers update this record themselves, so call before visiting.

How can I verify Katherine Shadish, PHD's license?

NPPES lists California license number 30634, 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. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.