MATTHEW ROSEN
NPI 1033503347
Emergency Medicine in Los Angeles, CA
About Matthew Rosen NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MATTHEW ROSEN (NPI 1033503347) is an individual emergency medicine provider in Los Angeles, California, licensed in California (A144814) and active in the NPI registry since March 2015. He is enrolled in Medicare PECOS and is a graduate of Georgetown University School Of Medicine (2015).
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
Matthew Rosen 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 Matthew Rosen reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Santa Monica, CA 90404
- Reassigned Medicare billing, California enrollment
- 1,204 clinicians in this Medicare group
Los Angeles, CA 90034
- Reassigned Medicare billing, California enrollment
- 13,921 clinicians in this Medicare group
Santa Barbara, CA 93105
- Reassigned Medicare billing, California enrollment
- 61 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 2
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 90024 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 90024
LOS ANGELES, CA 90024
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 Matthew Rosen's NPI number?
The NPI number for Matthew Rosen is 1033503347. It was assigned to this individual provider in the NPPES registry on March 25, 2015.
Where is Matthew Rosen located?
Matthew Rosen practices at 924 Westwood Blvd Ste 300, Los Angeles, CA 90024. The listed phone number is (310) 794-0585.
What is Matthew Rosen's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Matthew Rosen enrolled in Medicare?
Yes. Matthew Rosen 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 Matthew Rosen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Matthew Rosen reassigns Medicare benefits to 3 organizations: Cep America - California (Santa Monica, CA), Southern California Permanente Medical Group (Los Angeles, CA) and South Coast Emergency Medical Group Inc (Santa Barbara, 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 Matthew Rosen'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 Matthew Rosen was last updated on September 26, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Matthew Rosen · NPI 1033503347
Emergency Medicine physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since March 25, 2015.
## Identity
- **NPI:** 1033503347 (Entity type: Individual)
- **Enumerated:** March 25, 2015
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** A144814 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 924 WESTWOOD BLVD STE 300, Los Angeles, CA 90024-2924
- **Phone:** (310) 794-0585
## 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): Cep America - California (NPI 1063081545, Santa Monica, CA); Southern California Permanente Medical Group (NPI 1043242563, Los Angeles, CA); South Coast Emergency Medical Group Inc (NPI 1861432627, Santa Barbara, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Georgetown University School Of Medicine, class of 2015
## Record status
- **NPPES last updated:** September 26, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1033503347) · Data from the CMS NPPES public registry.