The Centers for Medicare and Medicaid Services is scouring payments covering health care for immigrants without legal status to ensure there isn’t any waste, fraud or abuse, according to public records obtained by KFF Health News and The Associated Press. While acknowledging that states can bill the federal government for Medicaid emergency and pregnancy care for immigrants without legal status, federal officials have sent letters notifying state health agencies in California, Colorado, Illinois, Minnesota, Oregon and Washington that they are reviewing federal and state payments for medical services, such as prescription drugs and specialty care.