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Adult substance use disorder treatment gaps by state

22 May 2026 6:45 AM | Deborah Hodges (Administrator)

Four in 5 (81.2%) U.S. adults 18 and older who needed substance use disorder treatment in 2023-2024 did not receive it, according to KFF data derived from the Substance Abuse and Mental Health Services Administration’s National Survey on Drug Use and Health.  [Becker's Behavioral Health]

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Participants were classified as needing treatment if they met criteria for a drug or alcohol use disorder outlined in the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders or had received treatment through inpatient or outpatient counseling, medication-assisted treatment, telehealth services or care provided in a prison, jail or juvenile detention center.

Estimated numbers were rounded to the nearest 1,000, and the survey noted the findings carry additional uncertainty because of a high proportion of respondents categorized under “substance unspecified” treatment. 

...17. Illinois — 82.8%

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