TSUNG TSO TSAI M.D.
NPI 1629250394
General Practice in Ontario, CA
About Tsung Tso Tsai M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TSUNG TSO TSAI M.D. (NPI 1629250394) is an individual general practice provider in Ontario, California, licensed in California (A114112) and active in the NPI registry since December 2007. He is enrolled in Medicare PECOS and is a graduate of Other (2004).
NPPES Registry Identity
Specialties & Licenses 3
Other Names 1
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
Tsung Tso Tsai 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 Reassignment
Medicare enrollment records show Tsung Tsai reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Chino Hills, CA 91709
- Reassigned Medicare billing, California enrollment
- 5,228 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
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.
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.
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 Tsung Tsai's NPI number?
The NPI number for Tsung Tsai is 1629250394. It was assigned to this individual provider in the NPPES registry on December 4, 2007. The provider is also known as Tsung-Tso Tsai M.D..
Where is Tsung Tsai located?
Tsung Tsai practices at 2295 S Vineyard Ave Building A, Ontario, CA 91761. The listed phone number is (888) 750-0036.
What is Tsung Tsai's specialty?
The primary specialty registered for this NPI is General Practice with taxonomy code 208D00000X.
Is Tsung Tsai enrolled in Medicare?
Yes. Tsung Tsai 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 organization bills Medicare for Tsung Tsai's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tsung Tsai reassigns Medicare benefits to Southern California Permanente Medical Group (Chino Hills, CA). The 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 Tsung Tsai'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 Tsung Tsai was last updated on November 30, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.
# Tsung Tso Tsai, M.D. · NPI 1629250394
General Practice physician in Ontario, California. Individual provider, active in the CMS NPPES registry since December 4, 2007.
## Identity
- **NPI:** 1629250394 (Entity type: Individual)
- **Enumerated:** December 4, 2007
- **Primary specialty:** General Practice · taxonomy 208D00000X
- **State license:** A114112 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 2295 S VINEYARD AVE, BUILDING A, Ontario, CA 91761-7925
- **Phone:** (888) 750-0036
## 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:** Southern California Permanente Medical Group (NPI 1396287082, Chino Hills, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2004
## Record status
- **NPPES last updated:** November 30, 2021
---
Source: [NPI Profile](https://npiprofile.com/npi/1629250394) · Data from the CMS NPPES public registry.