MARVIN ERIC BELZER MD
NPI 1013009778
Pediatrics - Adolescent Medicine in Los Angeles, CA
About Marvin Eric Belzer Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARVIN ERIC BELZER MD (NPI 1013009778) is an individual adolescent medicine provider in Los Angeles, California, licensed in California (G61403) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 4
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Marvin Eric Belzer Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Marvin Belzer 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
- Medicare enrollment name: Childrens Hospital Los Angeles Medical Group Inc
- 1,281 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 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
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 Marvin Belzer's NPI number?
The NPI number for Marvin Belzer is 1013009778. It was assigned to this individual provider in the NPPES registry on September 29, 2006.
Where is Marvin Belzer located?
Marvin Belzer practices at 4650 W Sunset Blvd Ms# 2, Los Angeles, CA 90027. The listed phone number is (323) 669-2153.
What is Marvin Belzer's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Adolescent Medicine, with taxonomy code 2080A0000X.
Is Marvin Belzer enrolled in Medicare?
Yes. Marvin Belzer is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Marvin Belzer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marvin Belzer reassigns Medicare benefits to Children's Hospital Los Angeles 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 Marvin Belzer'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 Marvin Belzer was last updated on August 15, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# Marvin Eric Belzer, MD · NPI 1013009778
Adolescent Medicine physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since September 29, 2006.
## Identity
- **NPI:** 1013009778 (Entity type: Individual)
- **Enumerated:** September 29, 2006
- **Primary specialty:** Pediatrics - Adolescent Medicine · taxonomy 2080A0000X
- **State license:** G61403 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 4650 W SUNSET BLVD, MS# 2, Los Angeles, CA 90027-6062
- **Phone:** (323) 669-2153 · **Fax:** (323) 913-3691
## 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:** Children's Hospital Los Angeles Medical Group, Inc. (NPI 1265530653, Los Angeles, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** August 15, 2011
- **Other identifiers:** Medicare UPIN E49066 (CA); Medicaid 00G614030 (CA); Medicare PIN WG61403C (CA); and 1 more
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Source: [NPI Profile](https://npiprofile.com/npi/1013009778) · Data from the CMS NPPES public registry.