Corrosion of other parts of respiratory tract, sequela

This code signifies the long-term or residual effects resulting from a chemical burn to any part of the respiratory tract, excluding the larynx, trachea, or lung. These sequelae can manifest as chronic inflammation, scarring, strictures, or other persistent tissue damage. The original corrosive injury has healed, but its lasting impact continues to affect respiratory function or structure.

Apply this code when documenting conditions such as chronic bronchitis, persistent airway obstruction, or fibrotic changes in the bronchi or bronchioles that are directly attributable to a past corrosive inhalation injury. This code is appropriate when the acute phase of the chemical burn has resolved, and the patient is being treated for the chronic complications.

• Always sequence this code after the code for the specific sequela (e.g., chronic bronchitis).
• Ensure documentation clearly links the current respiratory condition to a historical corrosive injury.
• Do not use for acute corrosive injuries; those require codes from the T27.0-T27.5 range.