Echo Health Ventures (Echo) and BlueCross BlueShield of Tennessee (BCBST) today announced that BCBST has joined the Echo Innovation Alliance (Alliance). Echo brings together Cambia Health Solutions, Mosaic Health Solutions, USAble Corporation (a wholly owned subsidiary of Arkansas Blue Cross and Blue Shield), and now BlueCross BlueShield of Tennessee to invest in companies that support and nationally scale cutting edge technologies in health care to improve affordability, accessibility and member outcomes.