Case-mix tool, costs and effectiveness in improving primary care mental health and substance abuse services

Despite its importance in improving care and developing services, high-quality data evaluating cost-effectiveness and services in different case-mix populations is scarce in primary care.

The objective was to investigate the service use of those mental health and substance abuse patients, who use lots of services.

Primary health care diagnosis-related groups (pDRG) is a tool to evaluate service provider system and improve efficiency, productivity and quality. We viewed all pDRG results available from the year 2015 concerning municipal mental health and substance abuse services.

In primary care mental health and substance abuse services, the most common ICD-10-codes were depression and substance abuse. One-fifth of patients produced 57% of costs. Their medium of appointments was 16 per year versus 6 per year of all patients. Only 54% of their diagnoses were recorded in the electronic health records versus 75% of all patients. They made 5.7 different pDRG episodes, including 1.8 episodes of depression, per patient. The average episode cost for this patient group was 301€.

pDRG makes health care production transparent also in mental health and substance abuse services. It is easy to identify patients, who use a lot of services and thus induce the majority of costs, and focus on their needs in managing and developing services.