AARP

Accountable / Interplan Health

Admar

AETNA*

American Imaging Management

Ancillary Care Services (ACS)

APWU

AnciCare

Beechstreet

BCBS (all states)

Benefit Panel Services

Coventry

Federal BCBS

First Health

Galaxy Health Network

GEHA

Humana

HMO Blue

Medicare

Medsolutions
   CIGNA
   Greatwest Healthcare

Multiplan

National ChoiceCare

Pacificare

PHCS

Proamerica

Secure Horizons

Southwest Medical Provider Network

Texas Healthcare Foundation

Texas True Choice

TWCC

UniCare

United Healthcare*

Up & Up

US Dept. of Labor