Malignant hyperthermia due to anesthesia, sequela

This code signifies the long-term or residual effects of a malignant hyperthermia episode that was triggered by anesthetic agents. These sequelae can include persistent muscle weakness, neurological deficits, kidney damage, or other chronic complications that arose directly from the acute hyperthermic crisis. The original acute event has resolved, but its lasting impact on the patient's health remains.

Use this code when documenting and billing for care related to chronic conditions or permanent damage resulting from a past episode of anesthetic-induced malignant hyperthermia. This applies to follow-up visits, ongoing treatment for related organ damage, or rehabilitation services addressing the lasting functional impairments. Do not use this code for the acute malignant hyperthermia event itself.

• Always sequence this code after the code(s) identifying the specific sequela (e.g., chronic kidney disease, muscle weakness).
• Ensure documentation clearly links the current condition to a prior episode of anesthetic-induced malignant hyperthermia.
• This code is for the sequela (S) encounter, indicating the long-term effects, not the initial acute event.