MS HB1131

Requires dental insurance plans to maintain a medical loss ratio (MLR) of at least 83%, meaning 83% of premium revenue must be spent on actual patient care rather than administrative and overhead costs.

Mandates dental insurers file annual MLR reports with the Department of Insurance organized by market and product type, using the same format as the 2013 federal Medical Loss Ratio Annual Reporting Form (CMS-10418).

Requires insurers to provide annual rebates to enrollees on a pro rata basis if the MLR falls below 83%, with rebates due by August 1 following the year in which the ratio is calculated.

Requires carriers offering dental benefit plans to file group product base rates and changes by July 1 of the preceding year, and authorizes the Department of Insurance to disapprove rates that are excessive, inadequate, unreasonable, or discriminatory.

Establishes a presumptive disapproval process for rate increases if administrative expenses increase more than the dental services consumer price index, if surplus contributions exceed 1.9%, or if aggregate MLR falls below 83%, with public hearings required.