Jolyn Chen Leung, M.D.
Obstetrics & Gynecology Physician · San Leandro, CA
Jolyn Chen Leung, M.D. is an obstetrics & gynecology physician with a practice address in San Leandro, California, and NPI 1629372180, issued on Dec 27, 2010. Check the license (California A120752, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jolyn Chen Leung
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A120752 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2500 Merced St, San Leandro, CA 94577
- Phone
- (510) 454-4090
- Enumerated
- Dec 27, 2010
- Record last updated
- Feb 12, 2026
- Medicare enrollment
- Enrolled (PECOS I20131016001827); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 2500 Merced St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rabiatu Abdullah, M.D.Emergency Medicine Physician1497833248
- Scott Abramson, M.D.Neurology Physician1891873667
- Jayaprada Achanta, M.D.Anesthesiology Physician1053463851
- Kristi Adachi, PHARMDPharmacist1396456737
- Mary Grace Aguayo, CRTCertified Respiratory Therapist1467923730
- Jatinder AhluwaliaPharmacist1508391483
Verify Jolyn Chen Leung in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A120752Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
25% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
124 Medicare Part D claims for 78 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims.
Most prescribed
- Estradiol26 claims
- Estring19 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Permanente Medical Group IncRichmond, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jolyn Chen Leung among 5,088 obstetrics & gynecology physician records in California
Jolyn Chen Leung, M.D. 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. Its NPI, issued in 2010, is newer than 70% of them.
- NPI issued2010 · 70% of these records are older, 28% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2008 · median 2004 among the 2,700 with a school on file
- Record last updated2026 · 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.
All 5,088 in California → Every provider in San Leandro → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Linda Catherine Degusta, M.D.San Leandro, CA 945771578635397
- Simone Katz, M.D.San Leandro, CA 945771770661522
- Colleen Kavanagh, M.D.San Leandro, CA 945771174608830
- Marie La Cour, M.D.San Leandro, CA 945771144372947
- Sarah Mark-Drasin, M.D.San Leandro, CA 945771700957610
- John Polito, M.D.San Leandro, CA 945771952489965
- Robert Rubeshaw, M.D.San Leandro, CA 945771629156484
- Katharine Simmons, M.D.San Leandro, CA 945771508008624
Common questions
What is Jolyn Chen Leung, M.D.'s NPI number?
Jolyn Chen Leung, M.D.'s National Provider Identifier (NPI) is 1629372180, issued on Dec 27, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Jolyn Chen Leung, M.D. located?
The NPPES record lists a practice address at 2500 Merced St, San Leandro, CA, 94577. Phone: (510) 454-4090. Providers update this record themselves, so call before visiting.
How can I verify Jolyn Chen Leung, M.D.'s license?
NPPES lists California license number A120752, 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.
How much does Jolyn Chen Leung, M.D. prescribe under Medicare Part D?
In 2024, Jolyn Chen Leung, M.D. had 124 Medicare Part D claims for 78 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions 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.
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.