nH Predict thread on bias

A former vice president in claims automation described nH Predict as more than a forecasting tool, saying its output shaped post-acute care denials that are now at the center of litigation and Senate scrutiny. (statnews.com) nH Predict was built by NaviHealth to estimate how long a Medicare Advantage patient would need care in a skilled nursing facility or rehabilitation setting after a hospital stay. UnitedHealth’s Optum unit bought NaviHealth in May 2020, and STAT reported managers set a 2023 target to keep stays within 1 percent of the algorithm’s projected length. (fiercehealthcare.com) (statnews.com) Families sued UnitedHealth in the District of Minnesota in November 2023, alleging the company used nH Predict to cut off medically necessary care for Medicare Advantage members in skilled nursing facilities. In a February 13, 2025 ruling, Judge John Tunheim allowed breach-of-contract and good-faith claims to move forward, and a March 9, 2026 discovery order said the case turns in part on whether nH Predict was used in place of physician medical directors. (statnews.com) (cases.justia.com) The bias question sits inside a larger fight over how Medicare Advantage plans use prior authorization in post-acute care, where the insurer decides whether it will keep paying after a hospital discharge. In October 2024, the Senate Permanent Subcommittee on Investigations said UnitedHealthcare, Humana, and CVS denied post-acute requests at much higher rates than other care, and said UnitedHealthcare’s denial rate rose from 10.9 percent in 2020 to 22.7 percent in 2022 as it expanded automation. (blumenthal.senate.gov) That mattered in a program that covered 32.8 million people in 2024, or 54 percent of everyone eligible for Medicare, according to KFF. Post-acute care denials can decide whether a patient stays in a facility for rehab, returns home, or leaves care before doctors and therapists think recovery is complete. (kff.org) (statnews.com) The core allegation is not only that the model made weak predictions, but that workers were pushed to treat those predictions like a cap. Former employees told STAT they risked discipline or termination if patients’ stays ran past the model’s number, even when extra days could be justified under Medicare rules. (statnews.com) (cbsnews.com) Patients and families challenged those denials through Medicare appeals, and the lawsuits cite a roughly 90 percent overturn rate as evidence that the system was rejecting care that should have been covered. CBS reported that both UnitedHealth and Humana were accused of using nH Predict in ways that overrode treating clinicians’ judgments about medical necessity. (cbsnews.com 1) (cbsnews.com 2) UnitedHealth has denied that artificial intelligence automatically issues adverse clinical decisions. In a statement quoted by STAT in May 2025, the company said any allegation that UnitedHealthcare uses an artificial intelligence algorithm to automatically deny claims is false, while an Optum spokesperson separately said the nH Predict tool is not used to make coverage decisions. (statnews.com) (beckerspayer.com) UnitedHealth dropped the NaviHealth name in 2024, folding it into Optum’s home and community business, but reports and court filings say the dispute did not end with the rebrand. The thread’s account of bias lands in a record that already includes internal targets, appeal reversals, a Senate investigation, and a live federal case over who really made the call. (statnews.com) (cases.justia.com)