DR. MARC E BIRNBAUM M.D.
NPI 1184607368
Anesthesiology in Los Angeles, CA
About Dr. Marc E Birnbaum M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARC E BIRNBAUM M.D. (NPI 1184607368) is an individual anesthesiology provider in Los Angeles, California, licensed in California (G83700) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS and maintains a secondary practice location in Tarzana.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Marc E Birnbaum M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Marc Birnbaum 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.
Areas of Expertise CMS Part B claims 4
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.
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 Marc Birnbaum's NPI number?
The NPI number for Marc Birnbaum is 1184607368. It was assigned to this individual provider in the NPPES registry on November 22, 2005.
Where is Marc Birnbaum located?
Marc Birnbaum practices at 4650 W Sunset Blvd, Los Angeles, CA 90027. The listed phone number is (323) 660-2450.
What is Marc Birnbaum's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Marc Birnbaum enrolled in Medicare?
Yes. Marc Birnbaum is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Marc Birnbaum's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marc Birnbaum 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 Marc Birnbaum'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 Marc Birnbaum was last updated on March 17, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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. Marc E Birnbaum, M.D. · NPI 1184607368
Anesthesiology physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since November 22, 2005.
## Identity
- **NPI:** 1184607368 (Entity type: Individual)
- **Enumerated:** November 22, 2005
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** G83700 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 4650 W SUNSET BLVD, Los Angeles, CA 90027-6062
- **Phone:** (323) 660-2450
## 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:** March 17, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1184607368) · Data from the CMS NPPES public registry.