Dr. David Mark Brennan DO is a male Emergency Medicine Specialist, has 26 years of experience and practices in Emergency Medicine, Family Medicine, and General Practice.
Dr. David Brennan has 8 office locations.
Mercy Hospital of Franciscan Sisters
201 8th Ave SE
Oelwein, IA 50662

Phone Number
Locations and availability (8)
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. David Brennan:

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  1. Qualifications
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Specialties & Research

  • He has special expertise in 1 area:
  • Flu (Human Influenza)

Education & Awards

Dr. Brennan graduated from Des Moines University.


Dr. Brennan has 21 hospital affiliations:

  • Covenant Medical Center 
  • Jennie Edmundson Hospital 

Accepted Insurance Plans

Dr. Brennan accepts these health insurances in at least one office:

  • Great-West Healthcare - 1 plan
  • Iowa Medicaid - 1 plan
  • Wellmark Blue Cross Blue Shield - 6 plans
  • Humana - 2 plans


  • Mandarin
  • Hindi
  • Russian
  • Ukrainian
  • Afrikaans

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Additional Information
Where does Dr. David M. Brennan practice?
Dr. David Brennan practices Emergency Medicine, Family Medicine, and General Practice near Oelwein, IA.
Additional practice locations include: Exira, IA and Rochester, MN.
See Oelwein Emergency Physicians, Oelwein Family Physicians, and Oelwein General Practitioners.