ELLEN CHANG WONG MD
NPI 1417339607
Psychiatry & Neurology - Neurology in Downey, CA
About Ellen Chang Wong Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ELLEN CHANG WONG MD (NPI 1417339607) is an individual neurology provider in Downey, California, licensed in California (A146928) and active in the NPI registry since June 2015. She is enrolled in Medicare PECOS and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
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 (PECOS)
Ellen Chang Wong Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Ellen Wong reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Los Angeles, CA 90033
- Reassigned Medicare billing, California enrollment
- 2,445 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 90242 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.
DOWNEY, CA 90242
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 Ellen Wong's NPI number?
The NPI number for Ellen Wong is 1417339607. It was assigned to this individual provider in the NPPES registry on June 24, 2015. The provider is also known as Ellen Chang MD.
Where is Ellen Wong located?
Ellen Wong practices at 7601 Imperial Hwy, Downey, CA 90242. The listed phone number is (562) 385-7111.
What is Ellen Wong's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.
Is Ellen Wong enrolled in Medicare?
Yes. Ellen Wong is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Ellen Wong's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ellen Wong reassigns Medicare benefits to Usc Care Medical Group, Inc (Los Angeles, 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 Ellen Wong'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 Ellen Wong was last updated on May 6, 2022. 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.
# Ellen Chang Wong, MD · NPI 1417339607
Neurology physician in Downey, California. Individual provider, active in the CMS NPPES registry since June 24, 2015.
## Identity
- **NPI:** 1417339607 (Entity type: Individual)
- **Enumerated:** June 24, 2015
- **Primary specialty:** Psychiatry & Neurology - Neurology · taxonomy 2084N0400X
- **State license:** A146928 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 7601 IMPERIAL HWY, Downey, CA 90242-3456
- **Phone:** (562) 385-7111
## 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:** Usc Care Medical Group, Inc (NPI 1902846306, Los Angeles, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** May 6, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1417339607) · Data from the CMS NPPES public registry.