Chilblains, sequela

This code represents the long-term or residual effects of chilblains, which are localized inflammatory lesions of the skin caused by repeated exposure to cold but not freezing temperatures. These sequelae can include persistent skin changes such as scarring, atrophy, chronic discoloration, or ongoing sensitivity in the affected areas, even after the acute phase of chilblains has resolved.

Use this code when documenting conditions that are a direct consequence of a previous episode of chilblains and are no longer acute. This applies to patients presenting with chronic skin changes, such as permanent redness, induration, or ulceration, that are directly attributable to a past history of chilblains.

• Assign this code as a secondary diagnosis following the code for the specific sequela (e.g., scar, atrophy).
• Ensure documentation clearly links the current condition to a past episode of chilblains.
• Do not use this code for acute chilblains; refer to codes within T69.1XXA for initial encounters or T69.1XXD for subsequent encounters.