Oth mental disorders due to known physiological condition

This code signifies a mental disorder that is directly attributable to a known underlying medical condition or physiological effect. It encompasses psychiatric symptoms or syndromes that are not better explained by another mental disorder and are clearly linked to a physical illness, injury, or substance. This diagnosis requires evidence of a direct pathophysiological connection between the medical condition and the mental symptoms.

Apply this code when documentation clearly establishes a causal link between a specific physiological condition (e.g., endocrine disorder, neurological disease, traumatic brain injury) and the development of psychiatric symptoms such as mood disturbances, anxiety, or psychotic features. This code is appropriate when the mental disorder is not merely a psychological reaction to the medical condition, but a direct consequence of its physiological impact.

• Always sequence the underlying physiological condition first, followed by this code.
• Ensure documentation explicitly states the mental disorder is "due to" or "secondary to" the physiological condition.
• Do not use for mental disorders that are psychological reactions to a medical illness without a direct physiological link.