DR. ROY VONGTAMA M.D.
NPI 1083837058
Radiology - Radiation Oncology in Los Angeles, CA
About Dr. Roy Vongtama M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ROY VONGTAMA M.D. (NPI 1083837058) is an individual radiation oncology provider in Los Angeles, California, licensed in California (A78334) and active in the NPI registry since April 2007. He is enrolled in Medicare PECOS and is a graduate of Other (2000).
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. Roy Vongtama 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 Reassignments
3Medicare enrollment records show Roy Vongtama reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Los Angeles, CA 90095
- Reassigned Medicare billing, California enrollment
- 240 clinicians in this Medicare group
Los Angeles, CA 90095
- Reassigned Medicare billing, California enrollment
- 31 clinicians in this Medicare group
Glendale, CA 91206
- Reassigned Medicare billing, California enrollment
- 164 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 90095 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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 90095
LOS ANGELES, CA 90095
LOS ANGELES, CA 90095
LOS ANGELES, CA 90095
LOS ANGELES, CA 90095
LOS ANGELES, CA 90095
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 Roy Vongtama's NPI number?
The NPI number for Roy Vongtama is 1083837058. It was assigned to this individual provider in the NPPES registry on April 10, 2007.
Where is Roy Vongtama located?
Roy Vongtama practices at 200 Medical Plaza B265, Los Angeles, CA 90095. The listed phone number is (310) 825-0128.
What is Roy Vongtama's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.
Is Roy Vongtama enrolled in Medicare?
Yes. Roy Vongtama 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 Roy Vongtama's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Roy Vongtama reassigns Medicare benefits to 3 organizations: Ucla Radiology Medical Group (Los Angeles, CA), The Regents Of The University Of California (Los Angeles, CA) and Glendale Adventist Medical Center (Glendale, 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 Roy Vongtama'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 Roy Vongtama was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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. Roy Vongtama, M.D. · NPI 1083837058
Radiation Oncology physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since April 10, 2007.
## Identity
- **NPI:** 1083837058 (Entity type: Individual)
- **Enumerated:** April 10, 2007
- **Primary specialty:** Radiology - Radiation Oncology · taxonomy 2085R0001X
- **State license:** A78334 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 200 MEDICAL PLAZA, B265, Los Angeles, CA 90095
- **Phone:** (310) 825-0128 · **Fax:** (310) 794-9795
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Ucla Radiology Medical Group (NPI 1881670248, Los Angeles, CA); The Regents Of The University Of California (NPI 1730143454, Los Angeles, CA); Glendale Adventist Medical Center (NPI 1336138403, Glendale, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2000
## Record status
- **NPPES last updated:** July 8, 2007
- **Other identifiers:** Medicare ID-Type Unspecified A78334 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1083837058) · Data from the CMS NPPES public registry.