DR. MARGARET SWENSON SOPER MD
NPI 1386806180
Radiology - Radiation Oncology in Los Angeles, CA
About Dr. Margaret Swenson Soper Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARGARET SWENSON SOPER MD (NPI 1386806180) is an individual radiation oncology provider in Los Angeles, California, licensed in California (A101946) and active in the NPI registry since July 2008. She is enrolled in Medicare PECOS and is a graduate of Harvard Medical School (2006).
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
Dr. Margaret Swenson Soper Md 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 Margaret Soper 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
- Also billed through NPI 1396287082 (California)
- 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 90027 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.
LOS ANGELES, CA 90027
LOS ANGELES, CA 90027
LOS ANGELES, CA 90027
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 Margaret Soper's NPI number?
The NPI number for Margaret Soper is 1386806180. It was assigned to this individual provider in the NPPES registry on July 2, 2008.
Where is Margaret Soper located?
Margaret Soper practices at 4950 W Sunset Blvd Dept. Of Radiation Oncology, Los Angeles, CA 90027. The listed phone number is (323) 783-6570.
What is Margaret Soper's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.
Is Margaret Soper enrolled in Medicare?
Yes. Margaret Soper 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 Margaret Soper's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Soper 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 Margaret Soper'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 Margaret Soper was last updated on October 16, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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. Margaret Swenson Soper, MD · NPI 1386806180
Radiation Oncology physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since July 2, 2008.
## Identity
- **NPI:** 1386806180 (Entity type: Individual)
- **Enumerated:** July 2, 2008
- **Primary specialty:** Radiology - Radiation Oncology · taxonomy 2085R0001X
- **State license:** A101946 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 4950 W SUNSET BLVD, DEPT. OF RADIATION ONCOLOGY, Los Angeles, CA 90027-5822
- **Phone:** (323) 783-6570
## 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:** Harvard Medical School, class of 2006
## Record status
- **NPPES last updated:** October 16, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1386806180) · Data from the CMS NPPES public registry.