- Blue Cross Blue Shield
- United Healthcare
- Aetna
- Cigna Healthcare
- 507 Texas District
- Accident Fund
- ACE American Insurance Company
- A-G Administrators, Inc.
- Alaska National Insurance Company
- All Savers
- Alliance
- Allstate
- Ambetter
- America First
- Amerisafe
- AR Net
- Argonaut Ins Co.
- ATA
- Axiom Medical
- BeechStreet EBMS
- Berkley Oil & Gas
- Berkshire Hathaway
- Bituminous Insurance
- Brotherhood Mutual Insurance
- California Workers Comp
- Central Mutual Insurance
- CHAMPVA
- Chartis
- Cherokee Insurance
- Christian Care Ministry
- Church Mutual Non-Network
- CMI- Wal-Mart Division
- Columbia Insurance Group
- CompKey Plus
- Coresource
- Corvel
- Corvel Commercial
- Coventry – Commercial
- Coventry HCN
- Coventry Health & Life
- Crime Victims
- Department of Labor
- Electric Insurance Company
- Emblem Health
- EMC
- Employers Insurance
- Equian
- ESIS
- Farmers – Work Comp
- Farmers Insurance