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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. Janet O'Mahony:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (3)

The overall average patient rating of Dr. Janet O'Mahony is Excellent. Dr. O'Mahony has been reviewed by 10 patients who have provided 3 comments. The rating is 5 out of 5 stars.

Patient Ratings
Ease of Appointment 5.0
Promptness 4.6
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. Janet O'Mahony, MD is board certified in Internal Medicine.

Education & Awards

Dr. O'Mahony graduated from University of Maryland , Baltimore. She has 3 awards.

Patients' Choice Award (2012, 2014)
Compassionate Doctor Recognition (2012, 2014)
On-Time Doctor Award (2014)


Dr. O'Mahony has 2 hospital affiliations:

  • Mercy Medical Center Inc 
  • St Joseph Medical Center 


  • Spanish

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Additional Information
Dr. Janet Marie O'Mahony MD is a female Internist, has 21 years of experience and practices in Internal Medicine.
Where does Dr. Janet M. O'Mahony practice?
Dr. Janet O'Mahony has 1 office location.
Dr. Janet O'Mahony practices Internal Medicine near Reisterstown, MD.
See Reisterstown Internists.