Richard Xavier Brennan, M.D.
Obstetrics & Gynecology Physician · Saint Louis, MO
Richard Xavier Brennan, M.D. is an obstetrics & gynecology physician with a practice address in Saint Louis, Missouri, and NPI 1316986540, issued on Jun 5, 2006. Check the license (Missouri MDR6H23, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Richard Xavier Brennan
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License numbers
- MDR6H23 MO
336-069221 IL
Self-reported in NPPES; status is on the state search - Practice location
- 12700 Southfork RD, Saint Louis, MO 63128
- Phone
- (314) 849-3711
- Enumerated
- Jun 5, 2006
- Record last updated
- Mar 14, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (314) 849-0235
- Medicaid ID
- 206853004 MO
- Medicare enrollment
- Enrolled (PECOS I20120607000720); accepts Medicare assignment
- Medical or professional school
- Saint Louis University School Of Medicine, 1986
- Entity
- Type 1 · individual
Also registered at 12700 Southfork RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Iqbal Amin, M.D.Geriatric Medicine (Internal Medicine) Physician1184619835
- Stephen Benz, M.D.Orthopaedic Surgery Physician1952354706
- Nancy Birner, MDPediatrics Physician1043214778
- James Brennan, M.D.Obstetrics & Gynecology Physician1699714360
- David Fagan, M.D.Orthopaedic Surgery Physician1952354763
- Patrick Garrett, M.D.Internal Medicine Physician1669466629
Verify Richard Xavier Brennan 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 MDR6H23Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
70% more Medicare Part D claims than the average obstetrics & gynecology physician in 2024
281 Medicare Part D claims for 90 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Estradiol68 claims
- Alendronate Sodium46 claims
- Nitrofurantoin Mono-Macro19 claims
- Metronidazole18 claims
- Fyavolv16 claims
- Valacyclovir12 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.
Industry payments in 2024: $86.10
5 payments; by number, the most common kind was food and beverage; the largest payer was Astellas Pharma US Inc. The 21,429 providers of this specialty with any payment received $1,030.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Mercy Clinic East CommunitiesSaint Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
332 obstetrics & gynecology physician records list a practice address in Saint Louis
They are 332 of the 27,605 NPPES records with a practice address in Saint Louis, and 902 obstetrics & gynecology physician records in Missouri.
All 332 in Saint Louis → All 902 in Missouri → Every provider in Saint Louis →
Other obstetrics & gynecology physician records in Missouri
- Ana Adams, DOKansas City, MO1962151613
- Pamela Adams, MDSaint Louis, MO1104116995
- Allie Adrian, MDSaint Louis, MO1205621596
- Mona Afrassiab, DOOsage Beach, MO1679572119
- Gabrielle AgcaoiliKansas City, MO1023909249
- Christoper Ahlering, M.D.Saint Louis, MO1760419485
- Sandra Ahlum, M.D.Hannibal, MO1427037183
- Nusrat Ahmad, MDSaint Louis, MO1114966348
- Natasha Ahmed, M.D.Kansas City, MO1861758716
- Tanvira Alam, DOO Fallon, MO1265670525
Common questions
What is Richard Xavier Brennan, M.D.'s NPI number?
Richard Xavier Brennan, M.D.'s National Provider Identifier (NPI) is 1316986540, issued on Jun 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Richard Xavier Brennan, M.D. located?
The NPPES record lists a practice address at 12700 Southfork RD, Saint Louis, MO, 63128. Phone: (314) 849-3711. Providers update this record themselves, so call before visiting.
How can I verify Richard Xavier Brennan, M.D.'s license?
NPPES lists Missouri license number MDR6H23, 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 Richard Xavier Brennan, M.D. prescribe under Medicare Part D?
In 2024, Richard Xavier Brennan, M.D. had 281 Medicare Part D claims for 90 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.