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 / CT

MICHAEL R ONEILL, MD

HOSPITALIST

Graduated: 2017

Also: INTERNAL MEDICINE

Offers telehealth

NPI: 1356873319

Practice Locations (5)

HARTFORD HEALTHCARE MEDICAL GROUP SPECIALISTS PLLC

111 BEACH RD, SUITE 3

FAIRFIELD, CT 068246668

2032552340

REHABILITATION ASSOCIATES INC

1931 BLACK ROCK TPKE

FAIRFIELD, CT 068253506

2033848681

HARTFORD HEALTHCARE MEDICAL GROUP SPECIALISTS PLLC

85 SEYMOUR ST

HARTFORD, CT 061065501

8606964306

REHABILITATION ASSOCIATES INC

555 BRIDGEPORT AVE

SHELTON, CT 064844749

2039221773

HARTFORD HEALTHCARE MEDICAL GROUP SPECIALISTS PLLC

1244 STORRS RD, ROAD

STORRS, CT 062682200

8607242579

Source: CMS National Downloadable File, September 2026.