DR. EILEEN YUAN CHANG
NPI 1376746644
Emergency Medicine in Torrance, CA
About Dr. Eileen Yuan Chang NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. EILEEN YUAN CHANG (NPI 1376746644) is an individual emergency medicine provider in Torrance, California, licensed in California (A111171) and active in the NPI registry since June 2007. She is enrolled in Medicare PECOS and is a graduate of Northwestern University Feinberg Medical School (2005).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 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
Dr. Eileen Yuan Chang 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
4Medicare enrollment records show Eileen Chang reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Torrance, CA 90505
- Reassigned Medicare billing, California enrollment
- 49 clinicians in this Medicare group
Los Angeles, CA 90059
- Reassigned Medicare billing, California enrollment
- 63 clinicians in this Medicare group
Los Angeles, CA 90059
- Reassigned Medicare billing, California enrollment
- 67 clinicians in this Medicare group
Newport Beach, CA 92663
- Reassigned Medicare billing, California enrollment
- 59 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 4
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 90503 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.
TORRANCE, CA 90503
TORRANCE, CA 90503
TORRANCE, CA 90503
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 Eileen Chang's NPI number?
The NPI number for Eileen Chang is 1376746644. It was assigned to this individual provider in the NPPES registry on June 6, 2007.
Where is Eileen Chang located?
Eileen Chang practices at 4101 Torrance Blvd Em Dept, Torrance, CA 90503. The listed phone number is (310) 540-7676.
What is Eileen Chang's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Eileen Chang enrolled in Medicare?
Yes. Eileen Chang 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 Eileen Chang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Eileen Chang reassigns Medicare benefits to 4 organizations: Torrance Emergency Physicians, Inc (Torrance, CA), Capital Hospitalist Medical Group Inc (Los Angeles, CA), Vep Mlk Emergency Medical Group Inc (Los Angeles, CA) and Newport Emergency Medical Group Inc (Newport Beach, 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 Eileen Chang'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 Eileen Chang was last updated on August 6, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Dr. Eileen Yuan Chang · NPI 1376746644
Emergency Medicine physician in Torrance, California. Individual provider, active in the CMS NPPES registry since June 6, 2007.
## Identity
- **NPI:** 1376746644 (Entity type: Individual)
- **Enumerated:** June 6, 2007
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** A111171 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 4101 TORRANCE BLVD, EM DEPT, Torrance, CA 90503-4607
- **Phone:** (310) 540-7676
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Torrance Emergency Physicians, Inc (NPI 1184048712, Torrance, CA); Capital Hospitalist Medical Group Inc (NPI 1992178222, Los Angeles, CA); Vep Mlk Emergency Medical Group Inc (NPI 1841679289, Los Angeles, CA); Newport Emergency Medical Group Inc (NPI 1922061779, Newport Beach, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Northwestern University Feinberg Medical School, class of 2005
## Record status
- **NPPES last updated:** August 6, 2015
- **Other identifiers:** Medicare PIN DH398Y (CA)
---
Source: [NPI Profile](https://npiprofile.com/npi/1376746644) · Data from the CMS NPPES public registry.