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Dr. Dennis O'Brien, MD

  • CT
  • Pediatrician
NPI1376196311
Industry payments
$49
State license
1
Year NPI issued
2019
Practice address
CT
Professional email
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Personal email
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Mobile number
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Social profiles

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Dr. Dennis O'Brien is a pediatrician in Connecticut

Dr. O'Brien practices in Connecticut.

Dr. O'Brien's NPI, 1376196311, was assigned on July 18, 2019. Dr. O'Brien graduated from University of Missouri-Columbia School of Medicine in 1991. Dr. O'Brien holds Illinois license 036.118812.

NPI and contact details
NPI
1376196311NPI Registry (opens in a new tab)
NPI enumeration date
July 18, 2019
NPI status
Active
Professional email
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Personal email
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Mobile number
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Medical school graduation
1991

Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data

Dmand AI tracks the EHR system at Dr. Dennis O'Brien's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. O'Brien practices. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Dr. O'Brien's practiceAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Dennis O'Brien is one of 788 pediatricians in Connecticut

Pediatrics is Dr. O'Brien's primary specialty in the NPI Registry, under taxonomy code 208000000X. Dr. O'Brien is licensed in Illinois.

Specialties and state licenses

  • Pediatrics, IllinoisPrimaryLicense 036.118812 · taxonomy 208000000X

Pediatricians near Dr. O'Brien

Counts of pediatricians with a Dmand AI profile, by place and practice. Each opens the list.

788pediatricians in Connecticut

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. Dennis O'Brien received $49 in industry payments from 2024 to 2025

CMS Open Payments shows 2 general payments to Dr. O'Brien from 2 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Teva Pharmaceuticals USA, Inc. paid the most, $31.

General payments to Dr. O'Brien by program year, 2024 to 2025

Companies that paid Dr. O'Brien the most, 2024 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. O'Brien

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Dennis O'Brien graduated from University of Missouri-Columbia School of Medicine

Dr. O'Brien graduated from University of Missouri-Columbia School of Medicine in 1991.

  1. Medical schoolUniversity of Missouri-Columbia School of Medicine

Source: Dmand AI Professional Profile Data

Sources for Dr. Dennis O'Brien's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Dennis O'Brien

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. Dennis O'Brien's NPI number?

Dr. Dennis O'Brien's NPI number is 1376196311. It was assigned on July 18, 2019, and it is active in the NPI Registry.

What kind of doctor is Dr. Dennis O'Brien?

Dr. Dennis O'Brien is a pediatrician in Connecticut. The primary specialty in the NPI Registry is Pediatrics Physician (taxonomy code 208000000X).

What is Dr. Dennis O'Brien's medical license number?

Dr. O'Brien holds Illinois license 036.118812.

Where did Dr. Dennis O'Brien go to medical school?

Dr. O'Brien graduated from University of Missouri-Columbia School of Medicine in 1991.

Has Dr. Dennis O'Brien received payments from drug or device companies?

CMS Open Payments shows $49 in general payments to Dr. O'Brien from 2 companies from 2024 to 2025. The largest total came from Teva Pharmaceuticals USA, Inc.

How long has Dr. Dennis O'Brien been practicing?

Dr. O'Brien graduated from medical school in 1991, 35 years ago.

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