| Business | Phone |
| Ambulatory Treatment Svc 4201 W Medical Center Dr, Mchenry 60050 | (815) 759-8000 |
| Varian Medical Systems Inc 2524 Knob Hill Rd, Mchenry 60050 | (815) 385-5791 |
| Centegra Primary Care 4309 W Medical Center Dr B202, Mchenry 60050 | (815) 344-3900 |
| Dr Srinivas Clinic 3922 Mercy Dr, Mchenry 60050 | (815) 344-4778 |
| Elgin Clinic 4309 W Medical Center Dr, Mchenry 60050 | (815) 578-4233 |
| Pulmonary & Sleep Medicine 4309 W Medical Center Dr, Mchenry 60050 | (815) 344-8553 |
| Palatine Heart Center 4309 W Medical Center Dr, Mchenry 60050 | (815) 759-5670 |
| Mercury Mchenry Occupational 3922 Mercy Dr, Mchenry 60050 | (815) 344-3700 |
| Mercy Center-Corrective Eye 5400 W Elm St 120, Mchenry 60050 | (815) 363-2020 |
| Mercy Mchenry Physical Therapy 3922 Mercy Dr, Mchenry 60050 | (815) 344-4499 |