D331

D331 is the ICF code for Non-speech vocal expression, classified under Activities and Participation. It describes vocalising when aware of another person in the proximal environment, such as making a sound when the mother is close; babbling; babbling in turn-taking activities. Vocalising in response to speech through imitating speech-sounds in a turn taking procedure.

D331 belongs to the Activities and Participation component of the ICF. Execution of tasks and involvement in life situations.

The ICF (International Classification of Functioning, Disability and Health) is a WHO classification that describes how health conditions affect a person's functioning — body functions, body structures, activities and participation, and environmental factors. It complements ICD-10/ICD-11 diagnosis codes with functioning assessment data used in rehabilitation, disability evaluation, and care planning.