Jill Tseng, M.D.
Gynecologic Oncology Physician · Orange, CA
Jill Tseng, M.D. is a gynecologic oncology physician with a practice address in Orange, California, and NPI 1265759807, issued on Apr 21, 2010. Check the license (California A156171, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jill Tseng
- Credential
- M.D.
- Primary taxonomy
- Gynecologic Oncology Physician 207VX0201X
- License number
- A156171 CA
Self-reported in NPPES; status is on the state search - Practice location
- 101 The City Drive South, Orange, CA 92868
- Phone
- (714) 456-8000
- Enumerated
- Apr 21, 2010
- Record last updated
- Sep 13, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (714) 456-8055
- Medicare enrollment
- Enrolled (PECOS I20180803001243); accepts Medicare assignment
- Medical or professional school
- Toledo Medical College, 2010
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gynecologic oncology physician records → All 176 in California → Look up another NPI →
Also registered at 101 The City Drive South
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nicholas Ambus, MDStudent in an Organized Health Care Education/Training Program1245084649
- Elham AmiriStudent in an Organized Health Care Education/Training Program1497160972
- Kellie Binder, NPPain Management Registered Nurse1114179611
- Robert Bristow, MDGynecologic Oncology Physician1427016039
- Madison CarterStudent in an Organized Health Care Education/Training Program1306692199
- Metha Chea, MDStudent in an Organized Health Care Education/Training Program1164363420
Verify Jill Tseng in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A156171Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
68% fewer Medicare Part D claims than the average gynecologic oncology physician in 2024
63 Medicare Part D claims for 23 beneficiaries, against an average of 195 among the 1,475 providers of this specialty who prescribed in Part D. Brand-name drugs were 30% of 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.
Industry payments in 2024: $337.61
10 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 1,199 providers of this specialty with any payment received $6,387.20 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Regents OF The University OF CaliforniaOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jill Tseng among 176 gynecologic oncology physician records in California
Jill Tseng, M.D. is one of 176 gynecologic oncology physician records with a practice address in California. 86% 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 69% of them.
- NPI issued2010 · 69% of these records are older, 26% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2010 · median 2004 among the 131 with a school on file
- Record last updated2018 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VX0201X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gynecologic Oncology Physician providers in California
There are 176 gynecologic oncology physician records in California.
All 176 in California → Every provider in Orange → Gynecologic Oncology Physician nationwide →
The 8 gynecologic oncology physician records with the nearest ZIP codes
- Michael L Berman, MDOrange, CA 928681295815371
- Robert Bristow, MDOrange, CA 928681427016039
- Fabio Cappuccini, MDOrange, CA 928681255346763
- Lila MarshallOrange, CA 928681508446907
- Mark Rettenmaier, M.D.Orange, CA 928681134166697
- Samantha Solaru, MDOrange, CA 928681588305528
- Krishnansu Tewari, M.D.Orange, CA 928681205868445
- Roger Schlesinger, MDFullerton, CA 928351669439816
Common questions
What is Jill Tseng, M.D.'s NPI number?
Jill Tseng, M.D.'s National Provider Identifier (NPI) is 1265759807, issued on Apr 21, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Jill Tseng, M.D. located?
The NPPES record lists a practice address at 101 The City Drive South, Orange, CA, 92868. Phone: (714) 456-8000. Providers update this record themselves, so call before visiting.
How can I verify Jill Tseng, M.D.'s license?
NPPES lists California license number A156171, 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 Jill Tseng, M.D. prescribe under Medicare Part D?
In 2024, Jill Tseng, M.D. had 63 Medicare Part D claims for 23 beneficiaries; the average among gynecologic oncology physician prescribers was 195. 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.