nH Predict and similar tools are being used by insurance companies to determine whether patients enrolled in US Medicare Advantage programmes are worthy of care, and are driving the denial of benefits.

According to a STAT investigation, nH Predict and other tools were being used 'to pinpoint the precise moment when they can shut off payment for a patient’s treatment,' particularly for the  elderly and disabled, and the denials that followed 'are setting off heated disputes between doctors and insurers'.

It later emerged that NaviHealth clinicians were becoming increasingly concerned that their UnitedHealth bosses were letting nH Predict override their own medical expertise. 

STAT also reported that NaviHealth managers insisted the algorithm was followed precisely so that payments could be cut off by the dates predicted.