| Business | Phone |
| A-Z Medical Billing & Consltng Gaithersburg 20877 | (301) 330-7811 |
| Us Medical Billing Svc 512 Palmspring Dr, Gaithersburg 20878 | (301) 926-2990 |
| Targan Group 18403 Woodfield Rd # D, Gaithersburg 20879 | (301) 330-3223 |
| Resolve Medical Billing Spec 17142 Downing St, Gaithersburg 20877 | (301) 519-3604 |
| Innovative Billing & Consltng 931 Russell Ave, Gaithersburg 20879 | (301) 990-4015 |