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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. Owen Halloran:

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Specialties & Research

  • He has special expertise in 1 area:
  • Critical Care

Education & Awards

Dr. Halloran graduated from University of Rochester .


Dr. Halloran has 5 hospital affiliations:

  • The Johns Hopkins Hospital 
  • Johns Hopkins Bayview Medical Center 

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Additional Information
Dr. Owen Joseph Halloran MD is a male Anesthesiologist, has 6 years of experience and practices in Anesthesiology.
Where does Dr. Owen J. Halloran practice?
Dr. Owen Halloran has 2 office locations.
Dr. Owen Halloran practices Anesthesiology near Baltimore, MD.
See Baltimore Anesthesiologists.