F81.3
Mixed disorder of scholastic skills
Coding guidance (WHO 2019)
An ill-defined residual category of disorders in which both arithmetical and reading or spelling skills are significantly impaired, but in which the disorder is not solely explicable in terms of general mental retardation or of inadequate schooling. It should be used for disorders meeting the criteria for both F81.2 and either F81.0 or F81.1. Excl.: specific: disorder of arithmetical skills (F81.2) reading disorder (F81.0) spelling disorder (F81.1)