According to our records, this business is located at 140 S Dearborn St. in Chicago (in Cook County), Illinois 60603, the location GPS coordinates are: 41.8797923 (latitude), -87.629686 (longitude). Allegiance Il Internal is categorized under Clinics (SIC code 8011). Current estimates show that the unit has a sales volume of $2,440,000 and staff of approximately 8 people. You can contact the company by phone at (312) 252-1000.