Unspecified mental disorder due to known physiological condition
Chapter 5:Mental, Behavioral and Neurodevelopmental disorders
ICD-10 F09 is a billable code used to indicate a diagnosis of unspecified mental disorder due to known physiological condition.
F09 is used to classify mental disorders that arise as a direct result of a known physiological condition. These disorders can manifest as organic mental disorders, which include cognitive impairments, delirium, and personality changes. The physiological conditions may range from metabolic disorders, neurological diseases, infections, or substance-induced conditions. Clinically, patients may present with confusion, altered consciousness, mood disturbances, or significant changes in personality and behavior. The diagnosis requires careful evaluation to establish a clear link between the physiological condition and the mental disorder, ensuring that the mental symptoms are not better explained by other psychiatric diagnoses. This code is particularly important in cases where the specific nature of the mental disorder cannot be precisely categorized, yet the physiological basis is evident. Accurate documentation of the underlying condition and the mental symptoms is crucial for proper coding and treatment planning.
Detailed psychiatric evaluation notes linking mental symptoms to physiological conditions.
Patients with dementia secondary to neurological disorders, delirium due to infections.
Ensure that all relevant medical history and physiological assessments are documented.
Neurological assessments and imaging results that correlate with mental health symptoms.
Patients with traumatic brain injuries presenting with personality changes.
Collaboration with psychiatry for comprehensive care and documentation.
Used when evaluating a patient with F09 to establish a diagnosis.
Comprehensive evaluation notes detailing mental and physiological assessments.
Psychiatrists should ensure interdisciplinary communication for accurate diagnosis.
F09 should be used when a mental disorder is present due to a known physiological condition, but the specific nature of the mental disorder cannot be accurately classified. Ensure that documentation supports this coding choice.
