ELLEN PHAMDUONG M.D.
NPI 1033571195
Anesthesiology in Los Angeles, CA
About Ellen Phamduong M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ELLEN PHAMDUONG M.D. (NPI 1033571195) is an individual anesthesiology provider in Los Angeles, California, licensed in California (A138991) and active in the NPI registry since March 2016. She is enrolled in Medicare PECOS and is a graduate of Saint Louis University School Of Medicine (2014).
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 and accepts Medicare assignment
Ellen Phamduong 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 Ellen Phamduong reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Los Angeles, CA 90027
- 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.
Other Providers at the Same Location NPPES 8
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LOS ANGELES, CA 90033
LOS ANGELES, CA 90033
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 Phamduong's NPI number?
The NPI number for Ellen Phamduong is 1033571195. It was assigned to this individual provider in the NPPES registry on March 27, 2016.
Where is Ellen Phamduong located?
Ellen Phamduong practices at 2051 Marengo St # C4e100, Los Angeles, CA 90033. The listed phone number is (323) 409-7748.
What is Ellen Phamduong's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Ellen Phamduong enrolled in Medicare?
Yes. Ellen Phamduong 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 Ellen Phamduong's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ellen Phamduong reassigns Medicare benefits to Southern California Permanente Medical Group (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 Phamduong'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 Phamduong was last updated on December 3, 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.
# Ellen Phamduong, M.D. · NPI 1033571195
Anesthesiology physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since March 27, 2016.
## Identity
- **NPI:** 1033571195 (Entity type: Individual)
- **Enumerated:** March 27, 2016
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** A138991 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2051 MARENGO ST # C4E100, Los Angeles, CA 90033-1352
- **Phone:** (323) 409-7748
## 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 1134151657, Los Angeles, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Saint Louis University School Of Medicine, class of 2014
## Record status
- **NPPES last updated:** December 3, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1033571195) · Data from the CMS NPPES public registry.