Inspector General Report on Claim Denials
A new report by federal investigators finds that Advantage plans have a pattern of inappropriately denying patient claims.
"widespread and persistent problems related to denials of care and payment in Medicare Advantage" plans, which usually are managed-care HMO or PPO plans. The Advantage payment model reimburses plans a pre-set amount per patient, and this may be incentivizing plans "to deny preauthorization of services for beneficiaries, and payments to providers, in order to increase profits,"
The good news is that those denials are frequently overturned if people bother to appeal.
https://www.reuters.com/article/us-column-miller-medicare/column-u-s-probe-shines-light-on-medicare-advantage-claims-denials-idUSKCN1MS2XG