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Best matches for copayment AND health insurance AND mental health AND parity:

Mental health parity legislation. Smaldone A et al. J Psychosoc Nurs Ment Health Serv. (2010)

Datapoints: mental health parity and employer-sponsored health insurance in 1999-2000: II. Copayments and coinsurance. Pacula RL et al. Psychiatr Serv. (2000)

Effect of copayments on use of outpatient mental health services among elderly managed care enrollees. Ndumele CD et al. Med Care. (2011)

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J Stud Alcohol. 2004 Nov;65(6):731-5.

The effect of parity-induced copayment reductions on adolescent utilization of substance use services.

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Health Services and Policy Analysis, School of Public Health, University of California, Berkeley, Berkeley, California, USA.



The purpose of this study was to determine if the reduction in copayment amount by a large self-insured state employer increased utilization of adolescent services. Specifically, the study sought to discover if the number of unique adolescent users of substance use outpatient services increased as a result of reductions in cost-sharing arrangements.


The data utilized in this study were 31,585 records from administrative claims data on utilization of mental health and substance abuse services from members of a state indemnity plan fromJuly 1998 through December 2001, translating to 36 months of pre-intervention data and 6 months of postintervention data. Monthly longitudinal data before and after benefit design change were analyzed using a quasi-experimental time series design, using Box and Jenkins' autoregressive, integrated, moving-average time-series modeling methods. The primary outcome measure was the number of unique users of services.


The hypothesis that service utilization would increase following the implementation of a reduction in copayment amount (the intervention) was supported in these analyses for adolescents' substance use service utilization. A significant increase in the number of unique adolescent users of substance use services was detected in the month following the intervention (p < .01).


The results of this study suggest that a reduction in adolescents' substance use service copayment requirements to a level equal to those for general medical services may be a step toward assuring full parity between such types of services. These findings provide potentially important information regarding the possible effects of broader policy changes, as parity in benefit design is a common component of laws that attempt to ensure "full parity."

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