Toxic effect of ketones, undetermined, sequela

This code signifies a long-term or residual health problem resulting from the toxic effects of ketones, where the specific intent (e.g., accidental, intentional self-harm) of the exposure is unknown. It indicates that the acute phase of the toxic effect has passed, but the patient continues to experience related sequelae.

Use this code when documenting a patient presenting with chronic or residual symptoms directly attributable to a past episode of ketone toxicity, and the circumstances surrounding the original exposure were not determined. This applies to follow-up encounters for conditions like persistent neurological deficits, organ damage, or other lasting complications from the initial toxic event.

• Always assign this code as a secondary diagnosis, following the code for the specific sequela being treated (e.g., a code for kidney failure if that is the sequela).
• Ensure documentation clearly links the current sequela to a past, undetermined toxic ketone exposure.
• Do not use this code for acute ketone toxicity; instead, use the appropriate acute phase code with the 7th character "A" (initial encounter).