Michael O'Neill Barron, M.D.
Family Medicine Physician · Saint Louis, MO
Michael O'Neill Barron, M.D. is a family medicine physician with a practice address in Saint Louis, Missouri, and NPI 1326063991, issued on Jul 13, 2006. Check the license (Missouri 2010020879, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Michael O'Neill Barron
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 2010020879 MO
Self-reported in NPPES; status is on the state search - Practice location
- 8515 Delmar Blvd Ste 217, Saint Louis, MO 63124
- Phone
- (314) 667-5276
- Enumerated
- Jul 13, 2006
- Record last updated
- Apr 2, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (314) 677-3838
- Medicaid IDs
- 370663567-62269-01 IL
036109935-5 IL - Medicare enrollment
- Enrolled (PECOS I20101015000795); accepts Medicare assignment
- Medical or professional school
- Saint Louis University School Of Medicine, 2001
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,991 in Missouri → Look up another NPI →
Verify Michael O'Neill Barron 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 2010020879Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
22% more Medicare Part D claims than the average family medicine physician in 2024
4,316 Medicare Part D claims for 224 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 136 claims were for opioids.
Most prescribed
- Atorvastatin Calcium334 claims
- Amlodipine Besylate259 claims
- Pantoprazole Sodium156 claims
- Albuterol Sulfate Hfa117 claims
- Eliquis109 claims
- Metformin Hcl103 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: $46.89
1 payment: food and beverage; the largest payer was Endomagnetics Ltd. The 55,478 providers of this specialty with any payment received $902.55 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.
Michael O'Neill Barron among 2,991 family medicine physician records in Missouri
Michael O'Neill Barron, M.D. is one of 2,991 family medicine physician records with a practice address in Missouri. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 13% of them.
- NPI issued2006 · 13% of these records are older, 52% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2001 · median 2006 among the 1,778 with a school on file
- Record last updated2019 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Family Medicine Physician providers in Missouri
There are 2,991 family medicine physician records in Missouri.
All 2,991 in Missouri → Every provider in Saint Louis → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Sukepma Giri, M.DSaint Louis, MO 631241700014651
- Raffy Gutman, M.D.Saint Louis, MO 631241861980872
- Jacqueline Hayes, M. D.Saint Louis, MO 631241134275662
- David Kantor, D.O.Saint Louis, MO 631241801994926
- Daniel Maestas, MDSaint Louis, MO 631241407823511
- David Campbell, M.D.Saint Louis, MO 631251801872254
- Babu Dandamudi, MDSaint Louis, MO 631251386645430
- Hudda Hantush, MDSaint Louis, MO 631251780646059
Common questions
What is Michael O'Neill Barron, M.D.'s NPI number?
Michael O'Neill Barron, M.D.'s National Provider Identifier (NPI) is 1326063991, issued on Jul 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael O'Neill Barron, M.D. located?
The NPPES record lists a practice address at 8515 Delmar Blvd Ste 217, Saint Louis, MO, 63124. Phone: (314) 667-5276. Providers update this record themselves, so call before visiting.
How can I verify Michael O'Neill Barron, M.D.'s license?
NPPES lists Missouri license number 2010020879, 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 Michael O'Neill Barron, M.D. prescribe under Medicare Part D?
In 2024, Michael O'Neill Barron, M.D. had 4,316 Medicare Part D claims for 224 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.