Glossary

Basis points: a single basis point amounts to a decimal value of 1 in the hundredths place (0.01). In the context of Stars, basis points can be referred to as components of measure level rate performance (on a scale of 0 to 100% for most measures) or as components of summary ratings (on a scale of 1 to 5).

· Measure level rate: A rate increase of 50% to 65% corresponds to an increase of 15 basis points.

· Summary rating: A rating increase of 3.72 to 3.79 corresponds to an increase of 7 basis points.

Measure Set: sometimes referred to as measure categories, measure sets are groupings of measures based on data source. Stars Monitor uses the following measure sets (as of the 2025 Rating Year): HEDIS, CAHPS, HOS, ADMIN, PDE, QI. For the full list of measures and corresponding measure set, see Appendix.

Projected performance: Hyperlift projects end-of-year performance for the current measurement year. The projection is based on the current rate and a predicted completion factor (rate change by end of year). The completion factor is determined by historical performance trends. The more historical data plans can provide, the more accurate the completion factor will be. Projected performance at the measure level is aggregated into projected summary ratings (Measure Set, Part C Summary, Part D Summary, Overall Rating).

Target performance: These are targets set by the plan at the measure level. Target performance at the measure level is aggregated to produce target summary ratings (Measure Set, Part C Summary, Part D Summary, Overall Rating).

Variance from target: Depending on the level of aggregation being viewed (Measure, Measure Set, Part C Summary, Part D Summary, Overall Rating), the variance from target refers to the projected performance minus the target performance. Variance can be positive or negative. For example:

Variance Sources: When viewing summary level performance, Stars Monitor frequently includes “Variance from target” as well as drivers of variance or variance sources. These are displayed at the measure set or measure level depending on the view. Variance sources are quantified based on the number of basis points attributable to the measure set or measure that is tracking above or below target. These drivers are only captured when measure level rate variance results in a material impact to measure level star. Basis points attributed to variance sources are determined by measure level star variance and measure weight.

Reward Factor and QI Optimization: The Star Monitor platform is intended to optimize performance on the 5x weighted improvement measures and maximize positive impact of the reward factor. Individual measures are specified as opportunities to improve performance minimally in order to have a much broader impact on overall performance through reward factor and QI.