| Business | Phone |
| Accu-Lab Medical Testing Inc 1300 S Wabash Ave 2, Chicago 60605 | (312) 939-3535 |
| Amc Drug Testing 8901 W Lincoln Ave, Chicago 60605 | (312) 566-0517 |
| Global Collection Inc 2100 S Indiana Ave 127, Chicago 60616 | (312) 225-5447 |
| Concentra Occupational Health 3145 S Ashland Ave 110, Chicago 60608 | (773) 254-5516 |