| Business | Phone |
| Ortho-Health Systems Inc 450 Skokie Blvd, Northbrook 60062 | (847) 498-5962 |
| Health Technology Resources 600 Academy Dr 100, Northbrook 60062 | (847) 291-2637 |
| Martin T Timm Co 3647 Woodhead Dr, Northbrook 60062 | (847) 498-8960 |
| Mitchell Planning Assoc 650 Dundee Rd, Northbrook 60062 | (847) 412-0300 |