| Business | Phone |
| Ambumed Inc 8990 Route 108, Columbia 21045 | (410) 740-3446 |
| Health Care Professionals Inc 11055 Little Patuxent Pkwy, Columbia 21044 | (410) 730-0376 |
| Mid-Atlantic Imaging Svc 9051 Red Branch Rd # C, Columbia 21045 | (410) 740-2220 |
| Sopha Medical Systems Inc 9720 Patuxent Woods Dr, Columbia 21046 | (410) 312-8800 |