MARIAH BROOKE BLEGEN MD
NPI 1184183972
Student in an Organized Health Care Education/Training Program in Los Angeles, CA
About Mariah Brooke Blegen Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARIAH BROOKE BLEGEN MD (NPI 1184183972) is an individual student in an organized health care education/training program in Los Angeles, California and active in the NPI registry since March 2019. She is enrolled in Medicare PECOS.
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 (PECOS)
Mariah Brooke Blegen Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Mariah Blegen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
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.
Other Providers at the Same Location NPPES 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LOS ANGELES, CA 90095
LOS ANGELES, CA 90095
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 Mariah Blegen's NPI number?
The NPI number for Mariah Blegen is 1184183972. It was assigned to this individual provider in the NPPES registry on March 19, 2019.
Where is Mariah Blegen located?
Mariah Blegen practices at Ronald Reagan Ucla 757 Westwood Plaza, Los Angeles, CA 90095. The listed phone number is (612) 770-6430.
What is Mariah Blegen's specialty?
The primary specialty registered for this NPI is Student in an Organized Health Care Education/Training Program with taxonomy code 390200000X.
Is Mariah Blegen enrolled in Medicare?
Yes. Mariah Blegen is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Mariah Blegen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mariah Blegen reassigns Medicare benefits to Southern California Permanente Medical Group (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 Mariah Blegen'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 Mariah Blegen was last updated on March 15, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Mariah Brooke Blegen, MD · NPI 1184183972
Student in an Organized Health Care Education/Training Program provider in Los Angeles, California. Individual provider, active in the CMS NPPES registry since March 19, 2019.
## Identity
- **NPI:** 1184183972 (Entity type: Individual)
- **Enumerated:** March 19, 2019
- **Primary specialty:** Student in an Organized Health Care Education/Training Program · taxonomy 390200000X
- **Sole proprietor:** No
## Practice location
- **Address:** RONALD REAGAN UCLA 757 WESTWOOD PLAZA, Los Angeles, CA 90095-0001
- **Phone:** (612) 770-6430
## 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:** Southern California Permanente Medical Group (NPI 1043242563, Los Angeles, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** March 15, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1184183972) · Data from the CMS NPPES public registry.