title: Diagnostic Concordance between DSM-5 and ICD-10 Cannabis Use Disorders.
abstract: OBJECTIVE
  With the recent federal mandate that all U.S. health care settings transition to ICD-10 billing codes, empirical evidence is necessary to determine if the DSM-5 designations map to their respective ICD-10 diagnostic categories/billing codes. The present study examined the concordance between DSM-5 and ICD-10 cannabis use disorder diagnoses.
  
  
  METHODS
  Data were derived from routine clinical assessments of 6871 male and 801 female inmates recently admitted to a state prison system from 2000 to 2003. DSM-5 and ICD-10 diagnostic determinations were made from algorithms corresponding to the respective diagnostic formulations.
  
  
  RESULTS
  Past 12-month prevalence rates of cannabis use disorders were comparable across classification systems. The vast majority of inmates with no DSM-5 diagnosis continued to have no diagnosis per the ICD-10, and a similar proportion with a DSM-5 severe diagnosis received an ICD-10 dependence diagnosis. Most of the variation in diagnostic classifications was accounted for by those with a DSM-5 moderate diagnosis in that approximately half of these cases received an ICD-10 dependence diagnosis while the remaining cases received a harmful use diagnosis.
  
  
  CONCLUSIONS
  Although there appears to be a generally high level of agreement between diagnostic classification systems for those with no diagnosis or those evincing symptoms of a more severe condition, concordance between DSM-5 moderate and ICD-10 dependence diagnoses was poor. Additional research is warranted to determine the appropriateness and implications of the current DSM-5 coding guidelines regarding the assignment of an ICD-10 dependence code for those with a DSM-5 moderate diagnosis.
authors.affiliation: Albizu University-Miami Campus, Department of Psychology, USA. Electronic address: sproctor@albizu.edu.
authors.forename: Steven L
authors.initials: SL
authors.lastname: Proctor
authors.affiliation: G.V. (Sonny) Montgomery VA Medical Center, Addictive Disorders Treatment Program, USA; University of Mississippi Medical Center, Department of Psychiatry and Human Behavior, USA.
authors.forename: Daniel C
authors.initials: DC
authors.lastname: Williams
authors.affiliation: Western Carolina University, Department of Criminology and Criminal Justice, USA.
authors.forename: Albert M
authors.initials: AM
authors.lastname: Kopak
authors.affiliation: G.V. (Sonny) Montgomery VA Medical Center, Addictive Disorders Treatment Program, USA; University of Mississippi Medical Center, Department of Psychiatry and Human Behavior, USA.
authors.forename: Andrew C
authors.initials: AC
authors.lastname: Voluse
authors.affiliation: G.V. (Sonny) Montgomery VA Medical Center, Addictive Disorders Treatment Program, USA; University of Mississippi Medical Center, Department of Psychiatry and Human Behavior, USA.
authors.forename: Kevin M
authors.initials: KM
authors.lastname: Connolly
authors.affiliation: Western Carolina University, Department of Psychology, USA.
authors.forename: Norman G
authors.initials: NG
authors.lastname: Hoffmann
mesh_terms: D000328:Adult; D039721:Diagnostic and Statistical Manual of Mental Disorders; D005260:Female; D006801:Humans; D038801:International Classification of Diseases; D008297:Male; D002189:Marijuana Abuse / Q000175:diagnosis* / Q000453:epidemiology; D008875:Middle Aged; D015995:Prevalence; D011329:Prisoners / Q000706:statistics & numerical data*; D011330:Prisons; D012720:Severity of Illness Index; D014481:United States / Q000453:epidemiology; D055815:Young Adult
keywords: Cannabis use disorder; Classification; DSM-5; Diagnostic criteria; ICD-10