MARIANA ZELIA MARTINEZ MD
NPI 1053765693
Emergency Medicine in Los Angeles, CA
About Mariana Zelia Martinez Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARIANA ZELIA MARTINEZ MD (NPI 1053765693) is an individual emergency medicine provider in Los Angeles, California, licensed in California (A150317) and active in the NPI registry since April 2016. 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)
Mariana Zelia Martinez Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Mariana Martinez 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 90033
- Reassigned Medicare billing, California enrollment
- 2,445 clinicians in this Medicare group
Chino, CA 91710
- Reassigned Medicare billing, California enrollment
- 99 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 90017 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Mariana Martinez's NPI number?
The NPI number for Mariana Martinez is 1053765693. It was assigned to this individual provider in the NPPES registry on April 20, 2016.
Where is Mariana Martinez located?
Mariana Martinez practices at 1225 Wilshire Blvd, Los Angeles, CA 90017. The listed phone number is (213) 977-2121.
What is Mariana Martinez's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Mariana Martinez enrolled in Medicare?
Yes. Mariana Martinez is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Mariana Martinez's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mariana Martinez reassigns Medicare benefits to 2 organizations: Usc Care Medical Group, Inc (Los Angeles, CA) and Chino Emergency Medical Associates, Inc. (Chino, 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 Mariana Martinez'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 Mariana Martinez was last updated on February 20, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Mariana Zelia Martinez, MD · NPI 1053765693
Emergency Medicine physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since April 20, 2016.
## Identity
- **NPI:** 1053765693 (Entity type: Individual)
- **Enumerated:** April 20, 2016
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** A150317 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1225 WILSHIRE BLVD, Los Angeles, CA 90017-1901
- **Phone:** (213) 977-2121
## 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): Usc Care Medical Group, Inc (NPI 1902846306, Los Angeles, CA); Chino Emergency Medical Associates, Inc. (NPI 1013282029, Chino, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** February 20, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1053765693) · Data from the CMS NPPES public registry.