Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Michael O'Neill Barron Jr., MD

Individual provider Family Medicine Physician · NPI 1326063991

Michael O'Neill Barron Jr., MD is registered under Family Practice in Saint Louis, Missouri. Graduated from Saint Louis University School of Medicine in 2001, 25 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in Missouri.

Years since qualifying
25
Trained at
Saint Louis University School of Medicine
Licensed in
MO
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

8515 Delmar Blvd Ste 217
Saint Louis, MO 63124-2168
Phone: (314) 667-5276
Fax: (314) 677-3838
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 2010020879 (MO)

Record details

NPI number1326063991
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 13, 2006
Last updated in NPPESApril 2, 2019

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyFAMILY PRACTICE
Medical schoolSAINT LOUIS UNIVERSITY SCHOOL OF MEDICINE
Graduated 2001 (25 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients25
Services billed 79 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Ssm Health St Mary'S Hospital - St Louis Hospital · Saint Louis, MO

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