The American journal of managed care
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To identify healthcare utilization characteristics that distinguish female members of a managed care organization (MCO) who remained compliant with hormone replacement therapy (HRT) from those who had poor compliance during an 18-month period and to estimate the cost of HRT to an MCO. ⋯ The added cost of HRT did not result in higher total healthcare utilization and costs, as women who complied well with therapy had decreased utilization and costs in other categories of care. Differences in subcategories of healthcare utilization suggest that level of HRT compliance reflects differences in how women access healthcare.