Service Lines are broad categories of care based on groupings of 3M’s APR-DRGs. Many categories have both medical and surgical versions–an example is Neurology and Neurological Surgery, both of which deal with neurological disorders. The separate data headings reflect medical versus surgical care for the condition. Procedures within a category may vary as to intensity. The data is adjusted to reflect the variation. You may access an Excel spreadsheet of Service Lines mapped to APR-DRGs here. Further definitions of service lines are provided as tool tips.