Joshua P. Vanderschaaf, PSYD
Psychologist · San Mateo, CA
Joshua P. Vanderschaaf, PSYD is a psychologist with a practice address in San Mateo, California, and NPI 1144300435, issued on Oct 17, 2006. Check the license (California PSY19237, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Joshua P. Vanderschaaf
- Credential
- PSYD
- Primary taxonomy
- Psychologist 103T00000X
- License number
- PSY19237 CA
Self-reported in NPPES; status is on the state search - Practice location
- 222 W 39TH Ave, San Mateo, CA 94403
- Phone
- (650) 573-2222
- Enumerated
- Oct 17, 2006
- Record last updated
- Apr 11, 2013 (not updated in 13 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20040331000775); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest psychologist records → All 7,304 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.
- Jesse Adams, M.D.Psychiatry Physician1407143399
- Stacey Adelson, NPNurse Practitioner1104951797
- Brita Almog, MDPediatrics Physician1033402847
- John Anderson, MDObstetrics & Gynecology Physician1013082429
- Shea AndersonClinical Social Worker1689964991
- Zohra Ansari, MSWClinical Social Worker1326462904
Verify Joshua P. Vanderschaaf in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PSY19237Check 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): 80.6 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
- County OF Santa ClaraSan Jose, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joshua P. Vanderschaaf among 7,304 psychologist records in California
Joshua P. Vanderschaaf, PSYD is one of 7,304 psychologist records with a practice address in California. 6% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 1% of them.
- NPI issued2006 · 1% of these records are older, 82% newer
- In a Medicare fileYes · 6% of these records are
- In the CMS Doctors and Clinicians fileYes · 14% of these records are
- Graduated2002 · median 2005 among the 1,058 with a school on file
- Record last updated2013 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103T00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
40 psychologist records list a practice address in San Mateo
They are 40 of the 3,909 NPPES records with a practice address in San Mateo, and 7,304 psychologist records in California.
All 7,304 in California → Every provider in San Mateo → Psychologist nationwide →
The 8 psychologist records with the nearest ZIP codes
- Katerina Baeza-HernandezSan Mateo, CA 944031831812908
- Penelope ClizbeSan Mateo, CA 944031912635137
- Jasmin Kwok, PH.D.San Mateo, CA 944031174870109
- David Lin, PHDSan Mateo, CA 944031588735807
- Maria Lorente-Foresti, PH.D.San Mateo, CA 944031124196688
- Maria Moran, PSY.DSan Mateo, CA 944031457580649
- Casey Newland, PSY.D.San Mateo, CA 944031790123818
- Grace Niu, PH.DSan Mateo, CA 944031871870592
Common questions
What is Joshua P. Vanderschaaf, PSYD's NPI number?
Joshua P. Vanderschaaf, PSYD's National Provider Identifier (NPI) is 1144300435, issued on Oct 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joshua P. Vanderschaaf, PSYD located?
The NPPES record lists a practice address at 222 W 39TH Ave, San Mateo, CA, 94403. Phone: (650) 573-2222. Providers update this record themselves, so call before visiting.
How can I verify Joshua P. Vanderschaaf, PSYD's license?
NPPES lists California license number PSY19237, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
What is Joshua P. Vanderschaaf, PSYD's MIPS final score?
The 2023 MIPS final score is 80.6 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.