DR. MARGARET RACHEL BRUBAKER MD
NPI 1629697180
Internal Medicine - Geriatric Medicine in Saint Louis, MO
About Dr. Margaret Rachel Brubaker Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARGARET RACHEL BRUBAKER MD (NPI 1629697180) is an individual geriatric medicine provider in Saint Louis, Missouri, licensed in Missouri (2024007576) and active in the NPI registry since April 2020. She is enrolled in Medicare PECOS, is affiliated with Memorial Hospital, and is a graduate of Creighton University School Of Medicine (2020).
NPPES Registry Identity
Specialties & Licenses 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. Margaret Rachel Brubaker 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 Margaret Brubaker reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Saint Louis, MO 63110
- Reassigned Medicare billing, Missouri enrollment
- 1,133 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 10
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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Memorial Hospital
Acute Care Hospitals · Belleville, ILBarnes Jewish Hospital
Acute Care Hospitals · Saint Louis, MOSsm Health St Mary's Hospital - St Louis
Acute Care Hospitals · Richmond Heights, MOMissouri Baptist Medical Center
Acute Care Hospitals · Town And Country, MOBarnes-Jewish West County Hospital
Acute Care Hospitals · Creve Coeur, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63110 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.
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
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 Margaret Brubaker's NPI number?
The NPI number for Margaret Brubaker is 1629697180. It was assigned to this individual provider in the NPPES registry on April 14, 2020.
Where is Margaret Brubaker located?
Margaret Brubaker practices at 4921 Parkview Pl Div Im General Med, Ste 12B, Saint Louis, MO 63110. The listed phone number is (314) 747-3969.
What is Margaret Brubaker's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Geriatric Medicine, with taxonomy code 207RG0300X.
Is Margaret Brubaker enrolled in Medicare?
Yes. Margaret Brubaker 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 Margaret Brubaker's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Brubaker reassigns Medicare benefits to Washington University (Saint Louis, MO). 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 Margaret Brubaker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Margaret Brubaker affiliated with any hospitals?
According to CMS data, Margaret Brubaker is affiliated with Memorial Hospital, Barnes Jewish Hospital, Ssm Health St Mary's Hospital - St Louis, Missouri Baptist Medical Center and Barnes-Jewish West County Hospital.
When was this NPI record last updated?
The NPPES record for Margaret Brubaker was last updated on April 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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. Margaret Rachel Brubaker, MD · NPI 1629697180
Geriatric Medicine physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since April 14, 2020.
## Identity
- **NPI:** 1629697180 (Entity type: Individual)
- **Enumerated:** April 14, 2020
- **Primary specialty:** Internal Medicine - Geriatric Medicine · taxonomy 207RG0300X
- **State license:** 2024007576 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 4921 PARKVIEW PL, DIV IM GENERAL MED, STE 12B, Saint Louis, MO 63110-1032
- **Phone:** (314) 747-3969 · **Fax:** (877) 869-8163
## 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:** Washington University (NPI 1992746903, Saint Louis, MO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Creighton University School Of Medicine, class of 2020
## Record status
- **NPPES last updated:** April 15, 2025
- **Other identifiers:** Medicaid 200127289 (MO)
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Source: [NPI Profile](https://npiprofile.com/npi/1629697180) · Data from the CMS NPPES public registry.