Jennie J. Chang, M.D.
Obstetrics & Gynecology Physician · Pasadena, CA
Jennie J. Chang, M.D. is an obstetrics & gynecology physician with a practice address in Pasadena, California, and NPI 1982668422, issued on Apr 13, 2006. Check the license (California A85586, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jennie J. Chang
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A85586 CA
Self-reported in NPPES; status is on the state search - Practice location
- 625 S Fair Oaks Ave, Pasadena, CA 91105
- Phone
- (626) 304-2626
- Enumerated
- Apr 13, 2006
- Record last updated
- Nov 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20110525000111); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 2002
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 625 S Fair Oaks Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Candida BahnmaierTechnician/Technologist1841080132
- Kim Bui, M.D.Obstetrics & Gynecology Physician1164871133
- Heather Butler, MDDermatology Physician1417927419
- Norman Chien, MDGeriatric Medicine (Internal Medicine) Physician1184696999
- Jennifer Chronis, M.D.Family Medicine Physician1598297954
- Gary Conrad, M.D.Cardiovascular Disease Physician1669424271
Verify Jennie J. Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A85586Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
18% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
136 Medicare Part D claims for 57 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Estradiol43 claims
- Fluconazole13 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
- Southern California Permanente Medical GroupPanorama City, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jennie J. Chang among 5,088 obstetrics & gynecology physician records in California
Jennie J. Chang, 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 52% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2002 · median 2004 among the 2,700 with a school on file
- Record last updated2021 · 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 Pasadena → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Ebenezer Ajilore, M.D.Pasadena, CA 911051891787537
- Della Fong, M.D.Pasadena, CA 911051700813359
- Melissa Grier, M.D.Pasadena, CA 911051861484420
- Wilbert Henneberg, MDPasadena, CA 911051265433155
- Bryan Jick, MDPasadena, CA 911051720051436
- Joseph Li, M.D.Pasadena, CA 911051770573941
- James Macer, MDPasadena, CA 911051134129711
- George Matsuda, MDPasadena, CA 911051144220815
Common questions
What is Jennie J. Chang, M.D.'s NPI number?
Jennie J. Chang, M.D.'s National Provider Identifier (NPI) is 1982668422, issued on Apr 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jennie J. Chang, M.D. located?
The NPPES record lists a practice address at 625 S Fair Oaks Ave, Pasadena, CA, 91105. Phone: (626) 304-2626. Providers update this record themselves, so call before visiting.
How can I verify Jennie J. Chang, M.D.'s license?
NPPES lists California license number A85586, 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 Jennie J. Chang, M.D. prescribe under Medicare Part D?
In 2024, Jennie J. Chang, M.D. had 136 Medicare Part D claims for 57 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.