Judith Leong Mates, MD
Obstetrics & Gynecology Physician · San Francisco, CA
Judith Leong Mates, MD is an obstetrics & gynecology physician with a practice address in San Francisco, California, and NPI 1114017407, issued on Oct 15, 2006. Check the license (California G0020343, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Judith Leong Mates
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- G0020343 CA
Self-reported in NPPES; status is on the state search - Practice location
- 236 W Portal Ave, San Francisco, CA 94127
- Phone
- (415) 566-1632
- Enumerated
- Oct 15, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (415) 566-1878
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 236 W Portal Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nancy Nelson, PTPhysical Therapist1811186257
- Christopher Segler, D.P.M.Foot & Ankle Surgery Podiatrist1912937830
Verify Judith Leong Mates in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G0020343Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Judith Leong Mates among 5,088 obstetrics & gynecology physician records in California
Judith Leong Mates, MD is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 52% newer
- In a Medicare fileNo · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2007 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 5,088 in California → Every provider in San Francisco → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Maida Taylor, MDSan Francisco, CA 941271336433309
- Elizabeth Swenson, MDSan Francisco, CA 941291114094331
- Ziyad Hannon, M.D.San Francisco, CA 941321942206560
- Pearl Yee, MDSan Francisco, CA 941321750430138
- Esther Chang, M.D.San Francisco, CA 941331699764274
- John Ho, M.D.San Francisco, CA 941331073540225
- Rena Hu, M.D.San Francisco, CA 941331275774374
- Dong Hwang, MDSan Francisco, CA 941331700951233
Common questions
What is Judith Leong Mates, MD's NPI number?
Judith Leong Mates, MD's National Provider Identifier (NPI) is 1114017407, issued on Oct 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Judith Leong Mates, MD located?
The NPPES record lists a practice address at 236 W Portal Ave, San Francisco, CA, 94127. Phone: (415) 566-1632. Providers update this record themselves, so call before visiting.
How can I verify Judith Leong Mates, MD's license?
NPPES lists California license number G0020343, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
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.