title: State parity laws and access to treatment for substance use disorder in the United States: implications for federal parity legislation.
abstract: OBJECTIVE
  The passage of the 2008 Mental Health Parity and Addiction Equity Act and the 2010 Affordable Care Act incorporated parity for substance use disorder (SUD) treatment into federal legislation. However, prior research provides us with scant evidence as to whether federal parity legislation will hold the potential for improving access to SUD treatment.
  
  
  OBJECTIVE
  To examine the effect of state-level SUD parity laws on state-aggregate SUD treatment rates and to shed light on the impact of the recent federal SUD parity legislation.
  
  
  METHODS
  We conducted a quasi-experimental study using a 2-way (state and year) fixed-effect method. We included all known specialty SUD treatment facilities in the United States and examined treatment rates from October 1, 2000, through March 31, 2008. Our main source of data was the National Survey of Substance Abuse Treatment Services, which provides facility-level information on specialty SUD treatment.
  
  
  METHODS
  State-level SUD parity laws during the study period.
  
  
  METHODS
  State-aggregate SUD treatment rates in (1) all specialty SUD treatment facilities and (2) specialty SUD treatment facilities accepting private insurance.
  
  
  RESULTS
  The implementation of any SUD parity law increased the treatment rate by 9% (P < .001) in all specialty SUD treatment facilities and by 15% (P = .02) in facilities accepting private insurance. Full parity and parity only if SUD coverage is offered increased the SUD treatment rate by 13% (P = .02) and 8% (P = .04), respectively, in all facilities and by 21% (P = .03) and 10% (P = .04), respectively, in facilities accepting private insurance.
  
  
  CONCLUSIONS
  We found a positive effect of the implementation of state SUD parity legislation on access to specialty SUD treatment. Furthermore, the positive association is more pronounced in states with more comprehensive parity laws. Our findings suggest that federal parity legislation holds the potential to improve access to SUD treatment.
authors.affiliation: Department of Health Policy and Management, Rollins School of Public Health, Emory University, Atlanta, Georgia.
authors.forename: Hefei
authors.initials: H
authors.lastname: Wen
authors.forename: Janet R
authors.initials: JR
authors.lastname: Cummings
authors.forename: Jason M
authors.initials: JM
authors.lastname: Hockenberry
authors.forename: Laura M
authors.initials: LM
authors.lastname: Gaydos
authors.forename: Benjamin G
authors.initials: BG
authors.lastname: Druss
mesh_terms: D006306:Health Surveys / Q000706:statistics & numerical data; D006801:Humans; D007348:Insurance, Health / Q000331:legislation & jurisprudence* / Q000706:statistics & numerical data; D008603:Mental Health / Q000331:legislation & jurisprudence* / Q000706:statistics & numerical data; D058991:Patient Protection and Affordable Care Act / Q000331:legislation & jurisprudence / Q000706:statistics & numerical data; D016320:Substance Abuse Treatment Centers / Q000331:legislation & jurisprudence* / Q000706:statistics & numerical data; D019966:Substance-Related Disorders / Q000628:therapy*; D014481:United States; D014482:United States Substance Abuse and Mental Health Services Administration / Q000331:legislation & jurisprudence / Q000706:statistics & numerical data