Evaluating the uptake of a Global Initiative for Asthma guideline update in a commercially insured, value-based care population.

In this descriptive study, initiators of ICS-formoterol experienced a decrease in asthma exacerbations and an increase in professional visits. Initiators also had higher mean asthma-specific pharmacy and total costs, but lower mean asthma-specific medical costs. Health plans can take additional steps to promote implementation of updated guidelines. Pursuing clinical programs to further reduce asthma exacerbations would benefit members, providers, and the health plan.