B4450

B4450 is the ICF code for Functions of the thoracic respiratory muscles, classified under Body Functions. It describes functions of the thoracic muscles involved in breathing.

B4450 belongs to the Body Functions component of the ICF. Physiological functions of body systems, including psychological functions.

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.