Substance use identification and follow-up rates among commercial and Medicare health insurance members in primary care and other settings

Changes in Healthcare Spending Attributable to High Deductible Health Plan Offer Among Enrollees with Comorbid Substance Use Disorder and Cardiovascular Disease

BACKGROUND

The rise in prevalence of high deductible health plans (HDHPs) in the United States may raise concerns for high-need, high-utilization populations such as those with comorbid chronic conditions. In this study, we examine changes in total and out-of-pocket (OOP) spending attributable to HDHPs for enrollees with comorbid substance use disorder (SUD) and cardiovascular disease (CVD).

METHODS

We used de-identified administrative claims data from 2007 to 2017. SUD and CVD were defined using algorithms of ICD 9 and 10 codes and HEDIS guidelines. The main outcome measures of interest were spending measure for all non-SUD/CVD-related services, SUD-specific services, and CVD-specific services, for all services and medications specifically. We assessed both total and OOP spending. We used an intent-to-treat two-part model approach to model spending and computed the marginal effect of HDHP offer as both the dollar change and percent change in spending attributable to HDHP offer.

RESULTS

Our sample included 33,684 enrollee-years and was predominantly white and male with a mean age of 53 years. The sample had high demonstrated substantial healthcare utilization with 94% using any non-SUD/CVD services, and 84% and 78% using SUD and CVD services, respectively. HDHP offer was associated with a 17.0% (95% CI = [0.07, 0.27] increase in OOP spending for all non-SUD/CVD services, a 21.1% (95% CI = [0.11, 0.31]) increase in OOP spending for all SUD-specific services, and a 13.1% (95% CI = [0.04, 0.23]) increase in OOP spending for all CVD-specific services. HDHP offer was also associated with a significant increase in OOP spending on non-SUD/CVD-specific medications and SUD-specific medications, but not CVD-specific medications.

CONCLUSIONS

This study suggests that while HDHPs do not change overall levels of annual spending among enrollees with comorbid CVD and SUD, they may increase the financial burden of healthcare services by raising OOP costs, which could negatively impact this high-need and high-utilization population.

Substance Use Disorders Among Medicare Beneficiaries: Prevalence, Mental and Physical Comorbidities, and Treatment Barriers

INTRODUCTION

This study aimed to determine the prevalence of treated and untreated substance use disorders among Medicare beneficiaries, the characteristics of Medicare beneficiaries with substance use disorders, and reasons for their unmet needs.

METHODS

This study used data from the National Survey of Drug Use and Health, 2015-2019. Substance use disorder was defined based on DSM-IV dependence or abuse criteria. Descriptive analyses were conducted in 2021, including testing for differences in unadjusted means.

RESULTS

Approximately 1.7 million Medicare beneficiaries were estimated to have past-year substance use disorder (8% of Medicare beneficiaries aged <65 years and 2% aged ≥65 years). Overall, 77% had an alcohol use condition, 16% had a prescription drug use condition, and 10% had a marijuana use condition. Of those who had past-year substance use disorder, 11% received treatment for their condition. Common reasons for not receiving treatment were lack of motivation (41%), financial barriers (33%), concern about what others might think (24%), logistical barriers such as lack of transportation (21%), and uncertainty about treatment efficacy (13%). Medicare beneficiaries with substance use disorders were more than twice as likely to have past-year serious psychological distress as those without substance use disorders (44% vs 21%, p<0.001 for those aged <65 years; 14% vs 4%, p<0.001 for those aged ≥65 years). Percentages of past-year suicidal ideation were also much higher among Medicare beneficiaries with substance use disorders than without (24% vs 6%, p<0.001 for those aged <65 years; 7% vs 2%, p=0.006 for those aged ≥65 years).

CONCLUSIONS

Few Medicare beneficiaries who need substance use disorder treatment receive it. Reducing Medicare coverage gaps and stigma may help meet this need.