BRENNAN MASON ROSS SPIEGEL MD
NPI 1184644189
Internal Medicine - Gastroenterology in Los Angeles, CA
About Brennan Mason Ross Spiegel Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
BRENNAN MASON ROSS SPIEGEL MD (NPI 1184644189) is an individual gastroenterology provider in Los Angeles, California, licensed in California (A70587) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of New York Medical College (1998).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 4
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
Brennan Mason Ross Spiegel 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 Brennan Spiegel reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Los Angeles, CA 90048
- Reassigned Medicare billing, California enrollment
- 1,001 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 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.
LOS ANGELES, CA 90095
LOS ANGELES, CA 90095
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 Brennan Spiegel's NPI number?
The NPI number for Brennan Spiegel is 1184644189. It was assigned to this individual provider in the NPPES registry on July 20, 2006.
Where is Brennan Spiegel located?
Brennan Spiegel practices at 200 Medical Plaza #365,530,420,120, Los Angeles, CA 90095. The listed phone number is (310) 478-3711.
What is Brennan Spiegel's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Brennan Spiegel enrolled in Medicare?
Yes. Brennan Spiegel 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 Brennan Spiegel's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Brennan Spiegel reassigns Medicare benefits to Cedars-Sinai Medical Center (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 Brennan Spiegel'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 Brennan Spiegel was last updated on July 20, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.
# Brennan Mason Ross Spiegel, MD · NPI 1184644189
Gastroenterology physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since July 20, 2006.
## Identity
- **NPI:** 1184644189 (Entity type: Individual)
- **Enumerated:** July 20, 2006
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** A70587 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 200 MEDICAL PLAZA, #365,530,420,120, Los Angeles, CA 90095
- **Phone:** (310) 478-3711
## 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:** Cedars-Sinai Medical Center (NPI 1639172372, Los Angeles, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** New York Medical College, class of 1998
## Record status
- **NPPES last updated:** July 20, 2010
- **Other identifiers:** Medicaid 00A705870 (CA); Medicare UPIN I18267 (CA); Medicare PIN WA70587A (CA); and 1 more
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Source: [NPI Profile](https://npiprofile.com/npi/1184644189) · Data from the CMS NPPES public registry.