America Medical Billing Center List
   Provides a directory of resumes and listings of medical billing companies.
   http://www.billingcenterlist.com/

American Medical Billing Association
   Information exchange and networking for professional medical billers and electronic claims processing consultants.
   http://www.webcom.com/medical/AMBA.htm

Medical Association of Billers
   Membership pages of billers for association.
   http://www.physicianswebsites.com/medical-billing-services.htm