F05 diagnosis code: delirium due to known physiological condition
Delirium (F05) is a serious disturbance in mental abilities that results in confused thinking and reduced awareness of the environment. This International Classification of Diseases code is used when delirium arises due to a known physiological condition, such as infections, metabolic disorders, head trauma, or withdrawal from certain substances.
F05 is part of a broader category that includes mental disorders due to known physiological conditions, distinguishing it from primary psychiatric conditions or other specified mental disorders.
It reflects how a systemic disease affecting the body, notably the brain or central nervous system, can lead to profound mental changes. These disturbances are classified under mental and behavioral disorders in the ICD-10-CM but must be linked to diseases classified elsewhere (like infections or organ failure). Properly identifying this relationship is essential for accurate diagnosis and treatment.
It's characterized by acute or subacute onset, fluctuating levels of consciousness, disorientation, hallucinations, and disturbances in cognitive functions such as attention, memory, and perception.