Marvin Belzer, MD
NPI 1013009778 · Pediatric Adolescent Medicine Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marvin Belzer, MD is a Pediatric Adolescent Medicine Physician provider in Los Angeles, CA (NPI 1013009778).
Provider details
- NPI number
- 1013009778
- Entity type
- Individual
- Primary specialty
- Pediatric Adolescent Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G61403 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-29
- Last updated
- 2011-08-15
Frequently asked questions
- What is Marvin Belzer's NPI number?
- Marvin Belzer's National Provider Identifier (NPI) is 1013009778, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marvin Belzer's specialty?
- Marvin Belzer is listed in the NPPES registry with a primary specialty of Pediatric Adolescent Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marvin Belzer located?
- Marvin Belzer's practice location on file with NPPES is 4650 W Sunset Blvd, Los Angeles, CA 90027-6062.
- What is Marvin Belzer's phone number?
- The practice phone number listed in the NPPES registry for Marvin Belzer is (323) 669-2153.
- Does Marvin Belzer accept Medicare?
- Marvin Belzer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marvin Belzer's NPI active?
- Yes — Marvin Belzer's NPI (1013009778) is active in the NPPES registry as of the last update on 2011-08-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.