Insurance: other; penalties for late payment of claims; increase. Amends secs. 2006 & 3142 of 1956 PA 218 (MCL 500.2006 & 500.3142).

SB 546 amends Michigan's Insurance Code to strengthen penalties for insurers delaying claim payments. It requires insurers to pay 12% annual interest on unpaid claims after 60 days, with tiered rates (1.5% for 30 days late, 2% for 31-90 days, 4% after 90 days) for claims not paid on time. The bill also mandates health plans pay "clean claims" (complete documentation) within 30 days, with interest if delayed, and clarifies timelines for proof of loss. This directly affects insurers, policyholders, third-party claimants, and health providers like hospitals or clinics processing medical claims.