DR. MARY ELIZABETH BRENNAN M.D.
NPI 1952468670
Family Medicine in Crownsville, MD
About Dr. Mary Elizabeth Brennan M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARY ELIZABETH BRENNAN M.D. (NPI 1952468670) is an individual family medicine provider in Crownsville, Maryland, licensed in Maryland (D0095712) and active in the NPI registry since January 2007. She is enrolled in Medicare PECOS, is affiliated with Lovelace Medical Center, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Locations 2
Other Identifiers 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
Dr. Mary Elizabeth Brennan M.d. 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
3Medicare enrollment records show Mary Brennan reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Humble, TX 77338
- Reassigned Medicare billing, New Mexico enrollment
- 251 clinicians in this Medicare group
Albuquerque, NM 87110
- Reassigned Medicare billing, New Mexico enrollment
- 111 clinicians in this Medicare group
Albuquerque, NM 87109
- Reassigned Medicare billing, New Mexico enrollment
- 554 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 7
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Lovelace Medical Center
Acute Care Hospitals · Albuquerque, NMPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21032 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 17
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 Mary Brennan's NPI number?
The NPI number for Mary Brennan is 1952468670. It was assigned to this individual provider in the NPPES registry on January 2, 2007.
Where is Mary Brennan located?
Mary Brennan practices at 1454 Fairfield Loop Rd, Crownsville, MD 21032. The listed phone number is (410) 987-6338.
What is Mary Brennan's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Mary Brennan enrolled in Medicare?
Yes. Mary 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 Mary Brennan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Brennan reassigns Medicare benefits to 3 organizations: Hospitalist Medicine Physicians Of Texas, PLLC (Humble, TX), Cura Healthcare (Albuquerque, NM) and Southwest Medical Associates, LLC (Albuquerque, NM). 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 Mary Brennan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Mary Brennan affiliated with any hospitals?
According to CMS data, Mary Brennan is affiliated with Lovelace Medical Center.
When was this NPI record last updated?
The NPPES record for Mary Brennan was last updated on February 9, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Dr. Mary Elizabeth Brennan, M.D. · NPI 1952468670
Family Medicine physician in Crownsville, Maryland. Individual provider, active in the CMS NPPES registry since January 2, 2007.
## Identity
- **NPI:** 1952468670 (Entity type: Individual)
- **Enumerated:** January 2, 2007
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** D0095712 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 1454 FAIRFIELD LOOP RD, Crownsville, MD 21032-2006
- **Phone:** (410) 987-6338
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Hospitalist Medicine Physicians Of Texas, PLLC (NPI 1629307095, Humble, TX); Cura Healthcare (NPI 1649984667, Albuquerque, NM); Southwest Medical Associates, LLC (NPI 1164491072, Albuquerque, NM) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** State University Of New York At Stony Brook, School Of Medicine, class of 1993
## Record status
- **NPPES last updated:** February 9, 2023
- **Other identifiers:** Medicaid J2527 (NM)
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Source: [NPI Profile](https://npiprofile.com/npi/1952468670) · Data from the CMS NPPES public registry.