DR. MICHAEL ANDREW MESSINA DO
NPI 1225591936
Emergency Medicine in Los Angeles, CA
About Dr. Michael Andrew Messina Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MICHAEL ANDREW MESSINA DO (NPI 1225591936) is an individual emergency medicine provider in Los Angeles, California, licensed in California (20258) and active in the NPI registry since April 2019. He is enrolled in Medicare PECOS and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Michael Andrew Messina Do is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Michael Messina reassigns Medicare billing to 2 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
- 135 clinicians in this Medicare group
Los Angeles, CA 90034
- Reassigned Medicare billing, California enrollment
- 13,921 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.
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.
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 Michael Messina's NPI number?
The NPI number for Michael Messina is 1225591936. It was assigned to this individual provider in the NPPES registry on April 9, 2019.
Where is Michael Messina located?
Michael Messina practices at 757 Westwood Plz Ste 1517, Los Angeles, CA 90095. The listed phone number is (310) 825-9111.
What is Michael Messina's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Michael Messina enrolled in Medicare?
Yes. Michael Messina is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Michael Messina's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Messina reassigns Medicare benefits to 2 organizations: Regents Of The Univ Of Ca Emer Med (Los Angeles, CA) and Southern California Permanente Medical Group (Los Angeles, 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 Michael Messina'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 Michael Messina was last updated on July 7, 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.
# Dr. Michael Andrew Messina, DO · NPI 1225591936
Emergency Medicine physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since April 9, 2019.
## Identity
- **NPI:** 1225591936 (Entity type: Individual)
- **Enumerated:** April 9, 2019
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 20258 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 757 WESTWOOD PLZ STE 1517, Los Angeles, CA 90095-1352
- **Phone:** (310) 825-9111
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Regents Of The Univ Of Ca Emer Med (NPI 1104889138, Los Angeles, CA); Southern California Permanente Medical Group (NPI 1043242563, Los Angeles, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 7, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1225591936) · Data from the CMS NPPES public registry.