DR. MARIAM S MOSTAMANDY MD
NPI 1225666209
Radiology - Diagnostic Radiology in Los Angeles, CA
About Dr. Mariam S Mostamandy Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARIAM S MOSTAMANDY MD (NPI 1225666209) is an individual diagnostic radiology provider in Los Angeles, California, licensed in California (A188622) and active in the NPI registry since March 2020. She is enrolled in Medicare PECOS and is a graduate of Other (2020).
NPPES Registry Identity
Specialties & Licenses 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. Mariam S Mostamandy Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
6Medicare enrollment records show Mariam Mostamandy reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Los Angeles, CA 90027
- Reassigned Medicare billing, California enrollment
- 13,921 clinicians in this Medicare group
Glendale, CA 91204
- Reassigned Medicare billing, California enrollment
- 181 clinicians in this Medicare group
Gilroy, CA 95020
- Reassigned Medicare billing, California enrollment
- 2,460 clinicians in this Medicare group
Walnut Creek, CA 94598
- Reassigned Medicare billing, California enrollment
- 810 clinicians in this Medicare group
Walnut Creek, CA 94598
- Reassigned Medicare billing, California enrollment
- 129 clinicians in this Medicare group
Oakland, CA 94609
- Reassigned Medicare billing, California enrollment
- 158 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 90027 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.
LOS ANGELES, CA 90027
LOS ANGELES, CA 90027
LOS ANGELES, CA 90027
LOS ANGELES, CA 90027
LOS ANGELES, CA 90027
LOS ANGELES, CA 90027
LOS ANGELES, CA 90027
LOS ANGELES, CA 90027
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 Mariam Mostamandy's NPI number?
The NPI number for Mariam Mostamandy is 1225666209. It was assigned to this individual provider in the NPPES registry on March 27, 2020.
Where is Mariam Mostamandy located?
Mariam Mostamandy practices at 4733 W Sunset Blvd Fl 3, Los Angeles, CA 90027. The listed phone number is (233) 872-3713.
What is Mariam Mostamandy's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Mariam Mostamandy enrolled in Medicare?
Yes. Mariam Mostamandy is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Mariam Mostamandy's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mariam Mostamandy reassigns Medicare benefits to 6 organizations: Southern California Permanente Medical Group (Los Angeles, CA), Bay Imaging Consultants Medical Group (Glendale, CA), County Of Santa Clara (Gilroy, CA), John Muir Trauma Physicians Billing Service (Walnut Creek, CA), John Muir Magnetic Imaging Center (Walnut Creek, CA) and 1 more organization, listed in the Medicare section above. 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 Mariam Mostamandy'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 Mariam Mostamandy was last updated on September 18, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months 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. Mariam S Mostamandy, MD · NPI 1225666209
Diagnostic Radiology physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since March 27, 2020.
## Identity
- **NPI:** 1225666209 (Entity type: Individual)
- **Enumerated:** March 27, 2020
- **Primary specialty:** Radiology - Diagnostic Radiology · taxonomy 2085R0202X
- **State license:** A188622 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 4733 W SUNSET BLVD FL 3, Los Angeles, CA 90027-6021
- **Phone:** (233) 872-3713
## 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:** 6 organizations under Medicare reassignment (form CMS-855R): Southern California Permanente Medical Group (NPI 1134151657, Los Angeles, CA); Bay Imaging Consultants Medical Group (NPI 1780154153, Glendale, CA); County Of Santa Clara (NPI 1922093533, Gilroy, CA); John Muir Trauma Physicians Billing Service (NPI 1093864837, Walnut Creek, CA); John Muir Magnetic Imaging Center (NPI 1235184110, Walnut Creek, CA); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2020
## Record status
- **NPPES last updated:** September 18, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1225666209) · Data from the CMS NPPES public registry.