BRIANNA MASTROMARINO MD
NPI 1124587027
Student in an Organized Health Care Education/Training Program in Los Angeles, CA
About Brianna Mastromarino Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
BRIANNA MASTROMARINO MD (NPI 1124587027) 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, is affiliated with North Shore Medical Center -, and is a graduate of Other (2019).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
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
Brianna Mastromarino Md 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 Reassignment
Medicare enrollment records show Brianna Mastromarino reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Salem, MA 01970
- Reassigned Medicare billing, Massachusetts enrollment
- 994 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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
North Shore Medical Center -
Acute Care Hospitals · Salem, MAMassachusetts General Hospital
Acute Care Hospitals · Boston, MAOther 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 90095
LOS ANGELES, CA 90095
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 Brianna Mastromarino's NPI number?
The NPI number for Brianna Mastromarino is 1124587027. It was assigned to this individual provider in the NPPES registry on March 19, 2019.
Where is Brianna Mastromarino located?
Brianna Mastromarino practices at 10833 Le Conte Ave Chs 27-139, Los Angeles, CA 90095. The listed phone number is (310) 825-9945.
What is Brianna Mastromarino's specialty?
The primary specialty registered for this NPI is Student in an Organized Health Care Education/Training Program with taxonomy code 390200000X.
Is Brianna Mastromarino enrolled in Medicare?
Yes. Brianna Mastromarino 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 organization bills Medicare for Brianna Mastromarino's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Brianna Mastromarino reassigns Medicare benefits to Mass General Brigham Medical Group Northern Massachusetts Inc (Salem, MA). 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 Brianna Mastromarino's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Brianna Mastromarino accept?
Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Brianna Mastromarino as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Brianna Mastromarino affiliated with any hospitals?
According to CMS data, Brianna Mastromarino is affiliated with North Shore Medical Center - and Massachusetts General Hospital.
When was this NPI record last updated?
The NPPES record for Brianna Mastromarino was last updated on March 19, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Brianna Mastromarino, MD · NPI 1124587027
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:** 1124587027 (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:** 10833 LE CONTE AVE, CHS 27-139, Los Angeles, CA 90095-3075
- **Phone:** (310) 825-9945
## 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:** Mass General Brigham Medical Group Northern Massachusetts Inc (NPI 1588606123, Salem, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2019
## Record status
- **NPPES last updated:** March 19, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1124587027) · Data from the CMS NPPES public registry.