MARJORIE BRENNAN MD
NPI 1285724096
Anesthesiology - Pediatric Anesthesiology in Washington, DC
About Marjorie Brennan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARJORIE BRENNAN MD (NPI 1285724096) is an individual pediatric anesthesiology provider in Washington, District Of Columbia, licensed in District Of Columbia (MD32115) and active in the NPI registry since October 2006. She is enrolled in Medicare PECOS, maintains a secondary practice location in Washington, and is a graduate of University Of Michigan Medical School (1987).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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
Marjorie Brennan 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 Reassignments
4Medicare enrollment records show Marjorie Brennan reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Washington, DC 20010
- Reassigned Medicare billing, District of Columbia enrollment
- 1,417 clinicians in this Medicare group
Bethesda, MD 20814
- Reassigned Medicare billing, Maryland enrollment
- 4,483 clinicians in this Medicare group
Fairfax, VA 22031
- Reassigned Medicare billing, Virginia enrollment
- 73 clinicians in this Medicare group
Baltimore, MD 21287
- Reassigned Medicare billing, District of Columbia enrollment
- Also billed through NPI 1740286418 (District of Columbia)
- 42 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 20010 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.
WASHINGTON, DC 20010
WASHINGTON, DC 20010
WASHINGTON, DC 20010
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 Marjorie Brennan's NPI number?
The NPI number for Marjorie Brennan is 1285724096. It was assigned to this individual provider in the NPPES registry on October 13, 2006.
Where is Marjorie Brennan located?
Marjorie Brennan practices at 111 Michigan Ave NW, Washington, DC 20010. The listed phone number is (202) 884-2025.
What is Marjorie Brennan's specialty?
The primary specialty registered for this NPI is Anesthesiology, specializing in Pediatric Anesthesiology, with taxonomy code 207LP3000X.
Is Marjorie Brennan enrolled in Medicare?
Yes. Marjorie Brennan 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 organizations bill Medicare for Marjorie Brennan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marjorie Brennan reassigns Medicare benefits to 4 organizations: Children's Hospital (Washington, DC), Johns Hopkins University (Bethesda, MD), Pediatric Specialists Of Virginia, LLC (Fairfax, VA) and Johns Hopkins University (Baltimore, MD). 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 Marjorie Brennan'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 Marjorie Brennan was last updated on February 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Marjorie Brennan, MD · NPI 1285724096
Pediatric Anesthesiology physician in Washington, District of Columbia. Individual provider, active in the CMS NPPES registry since October 13, 2006.
## Identity
- **NPI:** 1285724096 (Entity type: Individual)
- **Enumerated:** October 13, 2006
- **Primary specialty:** Anesthesiology - Pediatric Anesthesiology · taxonomy 207LP3000X
- **State license:** MD32115 (District of Columbia)
- **Sole proprietor:** No
## Practice location
- **Address:** 111 MICHIGAN AVE NW, Washington, DC 20010-2978
- **Phone:** (202) 884-2025
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Children's Hospital (NPI 1780800128, Washington, DC); Johns Hopkins University (NPI 1578569240, Bethesda, MD); Pediatric Specialists Of Virginia, LLC (NPI 1699119818, Fairfax, VA); Johns Hopkins University (NPI 1710106414, Baltimore, MD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Michigan Medical School, class of 1987
## Record status
- **NPPES last updated:** February 18, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1285724096) · Data from the CMS NPPES public registry.