Dr. Michael O'Neill Barron Jr., MD
- Medicare services, 2024
- 45
- Medicare patients, 2024
- 25
- Part D claims, 2024
- 4,316
- Hospital affiliations
- 1
- Industry payments
- $57
- Practice address
- 8515 Delmar Blvd Ste 217, Saint Louis, MO 63124-2168
- Practice phone
- Call (314) 667-5276
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Barron Family Medicine
Physician office · Saint Louis, Missouri
Find Dr. Barron's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Michael O'Neill Barron Jr. is a family medicine physician in Saint Louis, Missouri
Dr. Barron practices at Barron Family Medicine in Saint Louis, Missouri.
Dr. Barron's NPI, 1326063991, was assigned on July 13, 2006. Dr. Barron graduated from Saint Louis University School of Medicine in 2001. Dr. Barron holds Missouri license 2010020879.
- NPI
- 1326063991NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2860461688
- NPI enumeration date
- July 13, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (314) 667-5276
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 51
- Medical school graduation
- 2001
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael O'Neill Barron Jr. practices at Barron Family Medicine in Saint Louis, Missouri
Dr. Barron's primary practice is Barron Family Medicine, at 8515 Delmar Blvd Ste 217, Saint Louis, MO 63124-2168. The practice phone is (314) 667-5276.
- Barron Family Medicine8515 Delmar Blvd Ste 217, Saint Louis, MO 63124-2168Phone(314) 667-5276
Source: Dmand AI Affiliation Data
Dr. Michael O'Neill Barron Jr. is affiliated with 2 sites of care
Dr. Barron's primary practice is Barron Family Medicine in Saint Louis, Missouri. Dr. Barron is also affiliated with SSM Health St. Mary's Hospital - St. Louis.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Michael O'Neill Barron Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Barron practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Barron Family Medicine | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Michael O'Neill Barron Jr. is one of 2,412 family medicine physicians in Missouri
Family medicine is Dr. Barron's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Barron is licensed in Missouri.
Specialties and state licenses
- Family medicine, MissouriPrimary
Family medicine physicians near Dr. Barron
Counts of family medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Michael O'Neill Barron Jr. billed Medicare for 45 services in 2024
CMS data shows 45 Medicare services from Dr. Barron across 1 procedure code in 2024, all of them office visits, for 25 Medicare patients. Medicare paid $3,632 for them. Every service was in an office.
Dr. Barron's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 342024: 4532%
Dr. Barron compared with the Missouri median for family medicine physicians, 2024
- Dr. Barron
- Missouri median
- Medicare services
- 45vs 33386% below
- Medicare patients
- 25vs 15684% below
- Part D claims
- 3,640vs 1,2313.0 times
Medians across 2,555 family medicine physicians in Missouri with Dmand AI profiles that report each measure.
Dr. Barron's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael O'Neill Barron Jr. treated 25 Medicare patients in 2024, average age 74
CMS counts 25 Medicare patients who saw Dr. Barron in 2024. The largest group is 65 to 74, with 11 patients. 60% of them have high blood pressure. Their average risk score is 1.72, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Barron's median patient age at 69, with 44% women.
Dr. Barron's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Barron's Medicare patients, 2024
- High blood pressure60%
Share of Medicare patients with each condition. A patient can have several.
Dr. Barron's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women44%
- Men56%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Michael O'Neill Barron Jr. wrote 4,316 Medicare Part D claims in 2024
In 2024, Dr. Barron wrote 4,316 Medicare Part D claims for 224 patients. 91% of them were for generic drugs. CMS names the drug for 3,640 of them, across 91 drugs with 11 or more claims each, at $153,598 in total drug cost. In 2023, CMS named 4,253 claims across 106 drugs.
Dr. Barron's Part D claims by kind of drug, 2024
- Generic3,939 claims91%
- Brand-name335 claims8%
- Other42 claims1%
Dr. Barron's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Barron's Part D claims, 2024
- Opioids3%136 of 4,316 claims
- Antibiotics2%88 of 4,316 claims
- Antipsychotics, patients 65 and over0%15 of 4,316 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 4,2532024: 3,64014%
Drugs named by CMS: 91 in 2024, 106 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Michael O'Neill Barron Jr. takes part in Medicare
Dr. Barron accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Michael O'Neill Barron Jr. received $57 in industry payments from 2016 to 2024
CMS Open Payments shows 2 general payments to Dr. Barron from 2 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. Endomagnetics Ltd paid the most, $47.
General payments to Dr. Barron by program year, 2016 to 2024
Companies that paid Dr. Barron the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Michael O'Neill Barron Jr. graduated from Saint Louis University School of Medicine
Dr. Barron graduated from Saint Louis University School of Medicine in 2001.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Michael O'Neill Barron Jr.'s profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Michael O'Neill Barron Jr.
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Michael O'Neill Barron Jr.'s NPI number?
Dr. Michael O'Neill Barron Jr.'s NPI number is 1326063991. It was assigned on July 13, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael O'Neill Barron Jr.?
Dr. Michael O'Neill Barron Jr. is a family medicine physician in Saint Louis, Missouri. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Michael O'Neill Barron Jr. practice?
Dr. Barron practices at 8515 Delmar Blvd Ste 217, Saint Louis, MO 63124-2168. Dr. Barron's primary practice is Barron Family Medicine in Saint Louis, Missouri.
What is Dr. Michael O'Neill Barron Jr.'s office phone number?
The practice phone on file for Dr. Barron is (314) 667-5276.
What is Dr. Michael O'Neill Barron Jr.'s medical license number?
Dr. Barron holds Missouri license 2010020879.
Which hospitals is Dr. Michael O'Neill Barron Jr. affiliated with?
Dr. Barron is affiliated with SSM Health St. Mary's Hospital - St. Louis.
Does Dr. Michael O'Neill Barron Jr. accept Medicare?
Yes. CMS data shows Dr. Barron billed Medicare for 45 services in 2024, and Dr. Barron accepts Medicare assignment.
How many Medicare patients does Dr. Michael O'Neill Barron Jr. see?
CMS counts 25 Medicare patients who saw Dr. Barron in 2024, with an average age of 74.
What services does Dr. Michael O'Neill Barron Jr. bill to Medicare?
In 2024, Dr. Barron's most billed Medicare services were office visit, established patient (99214).
Where did Dr. Michael O'Neill Barron Jr. go to medical school?
Dr. Barron graduated from Saint Louis University School of Medicine in 2001.
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What drugs does Dr. Michael O'Neill Barron Jr. prescribe most?
In 2024 Medicare Part D data, Dr. Barron's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Pantoprazole Sodium.
Has Dr. Michael O'Neill Barron Jr. received payments from drug or device companies?
CMS Open Payments shows $57 in general payments to Dr. Barron from 2 companies from 2016 to 2024. The largest total came from Endomagnetics Ltd.
How long has Dr. Michael O'Neill Barron Jr. been practicing?
Dr. Barron graduated from medical school in 2001, 25 years ago.
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