Margaret Rachel Brubaker, MD
Geriatric Medicine (Internal Medicine) Physician · Saint Louis, MO
Margaret Rachel Brubaker, MD is a geriatric medicine (internal medicine) physician with a practice address in Saint Louis, Missouri, and NPI 1629697180, issued on Apr 14, 2020. Check the license (Missouri 2024007576, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Margaret Rachel Brubaker
- Credential
- MD
- Primary taxonomy
- Geriatric Medicine (Internal Medicine) Physician 207RG0300X
- License number
- 2024007576 MO
Self-reported in NPPES; status is on the state search - Practice location
- 4921 Parkview PL, Saint Louis, MO 63110
- Phone
- (314) 747-3969
- Enumerated
- Apr 14, 2020
- Record last updated
- Apr 15, 2025
- Fax
- (877) 869-8163
- Medicaid ID
- 200127289 MO
- Medicare enrollment
- Enrolled (PECOS I20240809003335); accepts Medicare assignment
- Medical or professional school
- Creighton University School Of Medicine, 2020
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest geriatric medicine (internal medicine) physician records → All 75 in Missouri → Look up another NPI →
Also registered at 4921 Parkview PL
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Margaret Rachel Brubaker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license 2024007576Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
50% fewer Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024
2,138 Medicare Part D claims for 235 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. 21 claims were for opioids.
Most prescribed
- Amlodipine Besylate136 claims
- Atorvastatin Calcium93 claims
- Losartan Potassium87 claims
- Levothyroxine Sodium75 claims
- Famotidine70 claims
- Escitalopram Oxalate65 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- Aging Well Health Care, LLCSaint Louis, MO
- Washington UniversitySaint Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Margaret Rachel Brubaker among 75 geriatric medicine (internal medicine) physician records in Missouri
Margaret Rachel Brubaker, MD is one of 75 geriatric medicine (internal medicine) physician records with a practice address in Missouri. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 95% of them.
- NPI issued2020 · 95% of these records are older, 1% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 45% of these records are
- Graduated2020 · median 1997 among the 34 with a school on file
- Record last updated2025 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Geriatric Medicine (Internal Medicine) Physician providers in Missouri
There are 75 geriatric medicine (internal medicine) physician records in Missouri.
All 75 in Missouri → Every provider in Saint Louis → Geriatric Medicine (Internal Medicine) Physician nationwide →
The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes
- Stanley Birge, MDSaint Louis, MO 631101205854908
- Dulce Cruz Oliver, MDSaint Louis, MO 631101447453691
- Lenise Cummings-Vaughn, MDSaint Louis, MO 631101336301613
- Hassan Elsiddig, M.D.Saint Louis, MO 631101558563890
- Ramzi Hajjar, M.D.Saint Louis, MO 631101386721744
- John Morley, MDSt Louis, MO 631101851302418
- Horace Perry, M.D.Saint Louis, MO 631101245317510
- Dominic Reeds, MDSaint Louis, MO 631101669495586
Common questions
What is Margaret Rachel Brubaker, MD's NPI number?
Margaret Rachel Brubaker, MD's National Provider Identifier (NPI) is 1629697180, issued on Apr 14, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Rachel Brubaker, MD located?
The NPPES record lists a practice address at 4921 Parkview PL, Saint Louis, MO, 63110. Phone: (314) 747-3969. Providers update this record themselves, so call before visiting.
How can I verify Margaret Rachel Brubaker, MD's license?
NPPES lists Missouri license number 2024007576, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Margaret Rachel Brubaker, MD prescribe under Medicare Part D?
In 2024, Margaret Rachel Brubaker, MD had 2,138 Medicare Part D claims for 235 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.