PETER M. TSAI MD
NPI 1942377809
Emergency Medicine in Bellflower, CA
About Peter M. Tsai Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
PETER M. TSAI MD (NPI 1942377809) is an individual emergency medicine provider in Bellflower, California, licensed in California (A60961) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Peter M. Tsai Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Peter Tsai reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Bellflower, CA 90706
- Reassigned Medicare billing, California enrollment
- 13,921 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 90706 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
BELLFLOWER, CA 90706
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 Peter Tsai's NPI number?
The NPI number for Peter Tsai is 1942377809. It was assigned to this individual provider in the NPPES registry on November 29, 2006.
Where is Peter Tsai located?
Peter Tsai practices at 9400 Rosecrans Ave, Bellflower, CA 90706. The listed phone number is (562) 461-3000.
What is Peter Tsai's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Peter Tsai enrolled in Medicare?
Yes. Peter Tsai is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Peter Tsai's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Peter Tsai reassigns Medicare benefits to Southern California Permanente Medical Group (Bellflower, 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 Peter 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 Peter Tsai was last updated on December 1, 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.
# Peter M. Tsai, MD · NPI 1942377809
Emergency Medicine physician in Bellflower, California. Individual provider, active in the CMS NPPES registry since November 29, 2006.
## Identity
- **NPI:** 1942377809 (Entity type: Individual)
- **Enumerated:** November 29, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** A60961 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 9400 ROSECRANS AVE, Bellflower, CA 90706-2246
- **Phone:** (562) 461-3000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **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 1043242555, Bellflower, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** December 1, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1942377809) · Data from the CMS NPPES public registry.