Janet O'Mahony Profile Image


  • Primary Care
  • Internal Medicine

Board Certifications:

  • Internal Medicine


  • English


  • Mercy Personal Physicians Downtown

Janet O'Mahony, M.D.

Janet O’Mahony, M.D. is a Primary Care Doctor and a member of Mercy Personal Physicians Downtown in Baltimore, Maryland. Dr. O’Mahony serves and treats Downtown residents and families of Federal Hill, Canton, Fells Point, Baltimore Metro Center and the Mt. Vernon arts and cultural district.

A Trusted and Reliable Treatment Process

Dr. Janet O’Mahony is a trusted physician and a patient’s first contact and source for medical evaluation and expertise. As a member of Mercy Personal Physicians Downtown, Dr. O’Mahony provides diagnosis and treatment for common medical conditions, as well as management of long-term health conditions.

While developing a trusting, ongoing relationship with her patients, Dr. O’Mahony encourages them to become active participants in their overall health. She evaluates and educates them on lifestyle choices and outcomes. She also encourages her patients to ask questions about their care and communicates with them openly about the treatment process.

Patient Health Advocate and Respected Source

Dr. Janet O’Mahony is an advocate for patient health and regularly contributes advice and feedback to media outlets, online resources and publications. She has been featured by Woman’s Day Magazine, Catholic Review and The Baltimore Sun on subjects including women’s health, heart disease, flu vaccine and sleeplessness. She has been also been featured on WBAL-TV11’s The Woman’s Doctor speaking on topics such as smoking cessation, hypertension, hypothyroidism and diet.

Board Certified in Internal Medicine, Dr. Janet O’Mahony received her medical degree from University of Maryland School of Medicine in Baltimore. She completed her Internship at Baltimore VA Medical Center and Residency at Mercy Medical Center in Baltimore, Maryland.

Education & Fellowships
  • Residency – University of Maryland Medical Center, Baltimore, Maryland
  • Internship - University of Maryland Medical Center, Baltimore, Maryland
  • Medical Degree – University of Maryland School of Medicine, Baltimore, Maryland

Associations & Memberships
  • American College of Physicians


Insurances Accepted

See a list of insurances accepted at Mercy. Restrictions may apply. Patients should confirm coverage with their carrier prior to appointment date.