- The Care Group, Houston Texas
- Kelsey-Seybold Clinic, Houston Texas
- Caremark Inc., Deerfield Illinois
- Friendly Hills Healthcare Network, La Habra California
- DHL Worldwide Express (National Billing Center), Houston Texas
- VHA Inc, Irving Texas
- Scripps Clinic and Research Foundation, La Jolla California
- Harris Methodist Health Systems, Ft. Worth Texas
- Texas College of Osteopathic Medicine (MSRDP), Ft. Worth Texas
- Arlington Mansfield Hospital, Arlington Texas
- Texas Back Institute, Plano Texas
- First Texas Medical Centers, Lewisville, Denton and Carolton Texas
- Team Health, Knoxville Tennessee
- Wilson and Jones Hospital, Sherman Texas
- Medical Plaza Hospital, Ft. Worth Texas
- National Underwriters Insurance Companies, Tampa Florida
- MedPartners Inc., Birmingham Alabama
- Houston Ob-Gyn Associates, Houston Texas
- The Mulliken Medical Group, Long Beach California
- Inphynet Physician Services, Plantation Florida
- Arlington Medical Associates, Arlington Texas
- Central Consolidated Insurance Groups, Wilmington Delaware
- McGovern Allergy Clinic, Houston Texas
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