Inhalation of hot air and gases, sequela

This code signifies a long-term or late-effect condition resulting from an inhalation injury caused by hot air or gases. It is used when the acute phase of the injury has passed, and the patient presents with persistent or new symptoms directly attributable to that past event. Examples include chronic respiratory issues, scarring, or other complications that manifest after the initial healing.

Apply this code when documenting a patient's current condition that is a direct consequence of a prior inhalation of hot air or gases. This would include follow-up visits for chronic obstructive pulmonary disease (COPD) or asthma exacerbated by a past burn injury, or for the management of tracheal stenosis that developed months or years after the initial thermal inhalation. It is appropriate when the sequela, not the acute injury, is the focus of the encounter.

• Always code the specific nature of the sequela first (e.g., J44.9 for COPD, J39.8 for other specified diseases of upper respiratory tract).
• Ensure documentation clearly links the current condition to the past inhalation injury.
• Do not use this code for acute inhalation injuries; use the acute injury codes from T59.- for those encounters.