Janet O'Mahony, M.D.
About This Business
With 35 years of experience since graduating from the University of Maryland School of Medicine in 1991, Janet O'Mahony, M.D., is an internal medicine physician in Baltimore, Maryland, above the 34-year average among the 81 Baltimore physicians in our directory. She is one of 25 internal medicine physicians in our Baltimore listings. She is affiliated with Mercy Medical Center. In MIPS, the federal program scoring Medicare clinicians on quality and cost, she holds 86 out of 100. She accepts Medicare and offers telehealth, one of 17 doctors in our Baltimore listings with both. Patients rate her 4.9 across 7 reviews.
Verified Provider Info
- Specialty (per registry)
- Internal Medicine
- NPI Number
- 1538107073
- Medical school graduate
- 1991 (35+ years of practice)
- Medical school
- UNIVERSITY OF MARYLAND SCHOOL OF MEDICINE
- State license
- D0046389 (MD)
- Hospital affiliations
- Mercy Medical Center Inc
- Quality score (CMS MIPS)
- 86/100
Source: NPPES NPI Registry (CMS) · CMS Doctors & Clinicians dataset · checked 2026-08-18
Phone
(410) 951-7920Location on Map
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Information last updated: September 7, 2026
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