Medicaid Expansion Boosted Specialty Treatment Episodes For Substance Use Disorder In Expansion States, 2010-22

Area of Science:

• Health Services Research
• Public Health Policy
• Addiction Medicine

Background:

• The Affordable Care Act (ACA) allowed states to expand Medicaid eligibility to low-income adults.
• Medicaid expansion mandates coverage for substance use disorder (SUD) treatment.
• The study period (2010-2022) encompasses the escalating national drug overdose crisis and evolving Medicaid policies.

Purpose of the Study:

• To evaluate the impact of ACA Medicaid expansions on access to specialty SUD treatment.
• To assess changes in financial protection for SUD services following Medicaid expansion.

Main Methods:

• Utilized all-payer data from 2010-2022, focusing on treatment episodes.
• Employed difference-in-differences methodology to compare expansion and non-expansion states.
• Analyzed effects on specialty SUD treatment utilization and financial protection.

Main Results:

• Medicaid expansion was associated with a 28% increase in specialty SUD treatment episodes.
• Significant improvements in financial protection, including insurance coverage and payment for services, were observed in expansion states.
• The findings indicate a positive correlation between Medicaid expansion and increased access to SUD care.

Conclusions:

• ACA Medicaid expansion is a crucial policy for enhancing access to SUD treatment for vulnerable populations.
• The findings underscore the role of Medicaid in mitigating the impact of the SUD epidemic.
• Policy interventions aimed at expanding health insurance coverage can improve treatment accessibility for SUD.