DR. JILL TSENG M.D.
NPI 1265759807
Obstetrics & Gynecology - Gynecologic Oncology in Irvine, CA
About Dr. Jill Tseng M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JILL TSENG M.D. (NPI 1265759807) is an individual gynecologic oncology provider in Irvine, California, licensed in California (A156171) and active in the NPI registry since April 2010. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Toledo Medical College (2010).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Jill Tseng M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Jill Tseng reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Orange, CA 92868
- Reassigned Medicare billing, California enrollment
- 149 clinicians in this Medicare group
Duarte, CA 91010
- Reassigned Medicare billing, California enrollment
- 1,335 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 5
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92618 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 3
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
IRVINE, CA 92618
IRVINE, CA 92618
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Jill Tseng's NPI number?
The NPI number for Jill Tseng is 1265759807. It was assigned to this individual provider in the NPPES registry on April 21, 2010.
Where is Jill Tseng located?
Jill Tseng practices at 1000 Fivepoint, Irvine, CA 92618. The listed phone number is (949) 868-2633.
What is Jill Tseng's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Gynecologic Oncology, with taxonomy code 207VX0201X.
Is Jill Tseng enrolled in Medicare?
Yes. Jill Tseng is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Jill Tseng's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jill Tseng reassigns Medicare benefits to 2 organizations: Regents Of The University Of California (Orange, CA) and City Of Hope Medical Foundation (Duarte, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Jill Tseng's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Jill Tseng was last updated on October 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Jill Tseng, M.D. · NPI 1265759807
Gynecologic Oncology physician in Irvine, California. Individual provider, active in the CMS NPPES registry since April 21, 2010.
## Identity
- **NPI:** 1265759807 (Entity type: Individual)
- **Enumerated:** April 21, 2010
- **Primary specialty:** Obstetrics & Gynecology - Gynecologic Oncology · taxonomy 207VX0201X
- **State license:** A156171 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1000 FIVEPOINT, Irvine, CA 92618-2377
- **Phone:** (949) 868-2633
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Regents Of The University Of California (NPI 1356304034, Orange, CA); City Of Hope Medical Foundation (NPI 1871886366, Duarte, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Toledo Medical College, class of 2010
## Record status
- **NPPES last updated:** October 9, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1265759807) · Data from the CMS NPPES public registry.