HealthCareAtlasUSA

This site republishes official CMS/Medicare Care Compare data. It is not medical advice and does not recommend any specific hospital or treatment — for medical decisions, talk to a doctor.

Doctors / NY

KAREN MREJEN, MD

PULMONARY DISEASE

Medical school: ALBANY MEDICAL COLLEGE OF UNION UNIVERSITY

Graduated: 1995

Also: CRITICAL CARE (INTENSIVISTS), INTERNAL MEDICINE

Offers telehealth

NPI: 1902999212

Practice Locations (1)

NORTH SHORE-LIJ MEDICAL PC

39 BRENTWOOD RD

BAY SHORE, NY 117068010

6316665864

Source: CMS National Downloadable File, September 2026.

KAREN MREJEN, MD | HealthCareAtlasUSA