Issue Brief
  1. The loss ratios shown in this issue brief differ from the definition of MLR in the ACA, which makes some adjustments for quality improvement and taxes, and do not account for reinsurance, risk corridors, or risk adjustment payments. Reinsurance payments, in particular, helped offset some losses insurers would have otherwise experienced. However, the ACA’s reinsurance program was temporary, ending in 2016, so loss ratio calculations excluding reinsurance payments are a good indicator of financial stability going forward.

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  2. Hospital patient days for 2014 are not necessarily representative of the full year because open enrollment was longer that year and a number of exchange enrollees did not begin their coverage until mid-year 2014.

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  3. See Methods for more discussion on how insurer estimates tend to vary from actual rebate totals.

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