Toxic effect of ketones, undetermined, initial encounter

This code signifies a patient presenting with adverse health effects resulting from exposure to ketones, where the intent of the exposure (e.g., accidental, intentional self-harm, assault) cannot be determined at the time of encounter. It indicates a systemic reaction to these substances, which can include symptoms like nausea, vomiting, abdominal pain, or central nervous system depression.

Apply this code when a patient exhibits signs and symptoms of ketone toxicity, and the medical record clearly documents that the circumstances surrounding the exposure are unknown or cannot be definitively classified. This is appropriate for the initial assessment and treatment of such an event in an emergency department or inpatient setting.

• Always assign an additional code for the specific ketone substance if known.
• Ensure documentation supports the "undetermined" intent; otherwise, a more specific intent code (e.g., accidental, intentional self-harm) should be chosen.
• This "A" suffix indicates an initial encounter for active treatment of the toxic effect.