In 1992, Dan Newman founded Accounting Corporation of the South as a collection agency that specialized in medical reimbursement management. Over a five year period, he refined medical reimbursement management for many medical clients, and began specialization in emergency medical transportation receivables management.

This evolved into Aeromedical Collection Services, Inc. (ACS) in 1997. ACS handles only medical transportation receivables management for ambulance services of all types in every part of the nation. It is the oldest and largest such company in existence, with headquarters in Shreveport/Bossier City, Louisiana, and satellite operations in Washington, D.C., Dallas, Texas, Philadelphia, Pennsylvania, and Tyler, Texas, and employees approximately 75 fulltime.

For calendar year 2002, Louisiana State University School of Economics ranked ACS as the 27th largest privately held corporation in East Texas and North Louisiana.