F94.0
Elective mutism
Coding guidance (WHO 2019)
Characterized by a marked, emotionally determined selectivity in speaking, such that the child demonstrates a language competence in some situations but fails to speak in other (definable) situations. The disorder is usually associated with marked personality features involving social anxiety, withdrawal, sensitivity, or resistance. Selective mutism Excl.: pervasive developmental disorders (F84.-) schizophrenia (F20.-) specific developmental disorders of speech and language (F80.-) transient mutism as part of separation anxiety in young children (F93.0)