I actually found a recent example of kickback allegations. The company is called Tenet Healthcare- a healthcare services company headquartered in Texas. The prenatal clinics allegedly referred undocumented Hispanic women to Tenet hospitals, which charged Medicaid for deliveries. The hospitals used contracts for translation and other services to pay the prenatal clinics illegal kickbacks, according to allegations. In the end, they agreed to pay $514 million dollars in settlements.

http://www.wsj.com/articles/tenet-healthcare-to-pay-514-million-to-settle-kickback-allegations-1475508703