30-Month Impact of Medications for Opioid Use Disorder on Acute Care Utilization in Rural Communities.

Purpose: To assess both the short- and longer-term impact of offering medications for opioid use disorder (MOUD, ie, methadone, buprenorphine, or naltrexone) on rates of all-cause emergency department (ED) visits and acute inpatient admissions (IP) over a 30-month period among Medicaid enrollees with opioid use disorder (OUD) residing in rural communities.

Methods: A quasi-experimental retrospective analysis of longitudinal Medicaid claims data among continuously enrolled adult patients with OUD residing in 71 predominantly rural counties in the United States between 2018 and 2020. A cohort of patients receiving MOUD treatment was compared against a contemporaneous propensity score-matched comparison group consisting of those who received no MOUD during the period.

Findings: The sample included 5370 patients with OUD in each group. At the index period (ie, the month in which any MOUD was used for the first time), buprenorphine was the most commonly used MOUD (82% of the MOUD treatment group). By the eighth month since the index period, MOUD use dropped below 60% among the MOUD treatment group. Over the 30-month post-MOUD period, MOUD treatment was associated with 24% (112 vs 148 per 1000 per month) and 52% (21 vs 44) lower rates of ED visit and IP admission rates, respectively (P < 0.001), relative to the comparison group. Moreover, the reductions persisted well after the 18th month period.

Conclusions: Receipt of MOUD was associated with both immediate- and long-term lower rates in acute care utilization rates among adult Medicaid beneficiaries with OUD residing in rural communities despite significant treatment discontinuation.