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 / IL

DARA B GRENNAN, MD

HOSPITALIST

Graduated: 2007

Also: INFECTIOUS DISEASE, INTERNAL MEDICINE

NPI: 1518282938

Practice Locations (3)

COOK COUNTY

1901 W HARRISON ST

CHICAGO, IL 606123714

3126337292

COOK COUNTY

500 E 51ST ST

CHICAGO, IL 606152494

3125722000

NORTHWESTERN MEDICAL FACULTY FOUNDATION

1000 N WESTMORELAND RD, PAVILLION B 3RD FL

LAKE FOREST, IL 600451659

8475358500

Source: CMS National Downloadable File, September 2026.

DARA GRENNAN, MD | HealthCareAtlasUSA