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 / NJ

MICHAEL KLEYN, MD

INTERNAL MEDICINE

Graduated: 2008

Also: CRITICAL CARE (INTENSIVISTS)

NPI: 1275761207

Practice Locations (1)

RWJBH OBSERVATION ASSOCIATES LLC

225 WILLIAMSON ST

ELIZABETH, NJ 072023625

6159729119

Source: CMS National Downloadable File, September 2026.

MICHAEL KLEYN, MD | HealthCareAtlasUSA