Whistleblowers Accuse UnitedHealthcare/Optum of Medicare Fraud, Denying Critical Care to Nursing Home Patients Less than a week after the resignation of UnitedHealth Group (UHG) CEO Andrew Witty, two whistleblowers have come forward with significant evidence alleging that Optum, a subsidiary of UnitedHealthcare (UHC), is engaged in dangerous and deceptive practices amounting to defrauding Medicare. The accusations detail a purported “playbook” employed by UHC that systematically delays or outright denies critical care to vulnerable nursing home patients to reduce costs and maximize profits.