| Business | Phone |
| Allmed Billing Frederick 21704 | (301) 874-3700 |
| Attaya Billing Agency Frederick 21701 | (301) 695-6555 |
| Cmg Medical Billing 184 Thomas Johnson Dr, Frederick 21702 | (301) 696-1400 |
| Healthcare Physician Svc Corp 41 S Market St, Frederick 21701 | (301) 620-9617 |
| Ims Inc 5711 Industry Ln # 13, Frederick 21704 | (301) 698-1700 |
| Lpl Medical Billing Svc 3606 John Simmons Ct, Frederick 21704 | (301) 831-8957 |
| Medical Account 5103 Pegasus Ct # H, Frederick 21704 | (301) 293-0232 |
| Mona Health Care Billing 1412 Teal Ln, Frederick 21703 | (301) 662-2443 |
| T J Rock Medical Management 10 N Jefferson St, Frederick 21701 | (301) 831-4352 |