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Pediatrician, Pediatric Specialist, Oncology Specialist (cancer)
11 years of experience
License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Learn more about Dr. Dennis O'Brien:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (0)

The overall average patient rating of Dr. Dennis O'Brien is Excellent. Dr. O'Brien has been reviewed by 1 patients who have provided 0 comments. The rating is 5 out of 5 stars.

Patient Ratings
Ease of Appointment 5.0
Promptness 5.0
Courteous Staff 5.0
Accurate Diagnosis 5.0
Bedside Manner 5.0
Spends Time with Me 5.0
Follows Up After Visit 5.0

Specialties & Research

Dr. Dennis O'Brien, MD is board certified in Pediatrics and Pediatric Hematology-Oncology.

  • He has special expertise in 4 areas:
  • Acute Myeloid Leukemia
  • Cancer
  • Chronic Myeloid Leukemia
  • Leukemia

Education & Awards

Dr. O'Brien graduated from University of Cincinnati.


Dr. O'Brien has 6 hospital affiliations:

  • Lagrange Community Hospital 
  • Parkview Hospital 

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Additional Information
Dr. Dennis Michael O'Brien MD is a male Pediatrician, has 11 years of experience and practices in Pediatrics and Pediatric Hematology-Oncology.
Where does Dr. Dennis M. O'Brien practice?
Dr. Dennis O'Brien has 1 office location.
Dr. Dennis O'Brien practices Pediatrics and Pediatric Hematology-Oncology near Fort Wayne, IN.
See Fort Wayne Pediatricians and Fort Wayne Pediatric Specialists.