Stark and other healthcare fraud and abuse laws fraud and abuse laws Stark and other healthcare fraud and abuse laws fraud and abuse laws fraud and abuse laws federal Stark law ("Stark") federal Stark law anti-kickback laws Stark and other healthcare fraud and abuse laws Stark and other healthcare fraud and abuse laws federal Stark law fraud and abuse federal Stark law ("Stark") federal Stark law arrangements under Stark and the AKS fraud and abuse federal Stark law ("Stark") federal Stark law ("Stark")