Volume 56 | Number 4 | August 2021

Abstract List

Katherine Piwnica‐Worms MD, MHS, Becky Staiger PhD, Joseph S. Ross MD, MHS, Marjorie S. Rosenthal, Chima D. Ndumele Ph.D.


To evaluate the effect of a forced disruption to Medicaid managed care plans and provider networks on health utilization and outcomes for children with persistent asthma.

Data Sources

Medicaid managed care administrative claims data from 2013 to 2016, obtained from a southeastern state.

Study Design

A difference‐in‐difference analysis compared patients’ outpatient, inpatient, and emergency department (ED) utilization and receipt of recommended services before and after implementation of a statewide redistribution of patients among nine managed care plans.

Data Collection/Extraction Methods

Enrollment data for children with asthma were linked to the administrative claims. Children were included if they had a diagnosis of persistent asthma in 2013 and if they were enrolled continuously throughout 2014‐2016.

Principal Findings

Among the 28 537 children with asthma, 26% were forced to switch their managed care plan after the redistribution. Of these, 67% also switched their primary care provider (PCP). Relative to those who remained in their plan, disruption was associated with an additional 2.1 percentage‐point decrease in the number of children who had an outpatient visit per quarter [95%CI −2.8, −1.3], from 71% to 66% (compared to plan stayers: 74% to 71%). Among children experiencing a change to their plan, there was overall a decrease in the proportion of children receiving an asthma‐specific visit per quarter, but there was less of a decrease in children that also changed their PCP [1.6 percentage points, 95%CI 0.7, 2.5], from 9.7% to 8.3% (compared to those who did not switch their PCP: 12% to 8.6%). Indicators of asthma care quality and emergent care utilization were not significantly different between the two periods.


While there was a decrease in the number of outpatient visits associated with forced disruption of Medicaid managed care plans for children with persistent asthma, there were no consistent associations with worse asthma quality performance or higher emergent health care utilization.