Association of opioid use disorder with healthcare utilization and cost in a public health system

Background and objectives To quantify the healthcare costs associated with opioid use disorder among members in a public healthcare system, and compare them to healthcare costs in the general population. Methods Retrospective cohort study in inpatient and outpatient care settings of Israel’s largest public healthcare provider (that covers 4.7 million members). Participants included 1,173 members who had a diagnosis of opioid use disorder in the years between 2013 and 2018. Each patient was matched with 10 controls based on age and sex. The main outcome was monthly healthcare costs. Results The mean monthly healthcare cost of members with opioid use disorder was $1,102 compared to $211 among controls (5.2-fold difference; 95% confidence interval [CI]: 4.6-6.0). After excluding members with heroin related diagnoses before the index date (in order to focus on prescription opioids), this healthcare cost ratio did not substantially change (4.6-fold; 95%-CI: 3.9-5.4). Members with opioid use disorder under the age of 65 years had a cost difference of 6.1-fold (95%-CI: 5.2-7.1), while those 65 years and older experienced cost difference of 3.4-fold (95%-CI: 2.6-4.5). The category with the highest cost for members with opioid use disorder was inpatient services, which was 8.7-fold (95%-CI 7.2-10.4) greater than among controls. Conclusions Healthcare costs among individuals with opioid use disorder in a public health system were substantially higher than among controls, at least partially attributed to prescription opioid use disorder. Differences were greater among individuals younger than 65 years, highlighting the importance of preventing and treating opioid use disorder among younger adult populations.