Corrosion of first degree of neck, sequela

This code signifies a first-degree corrosion (chemical burn) affecting the neck region, where the acute injury has healed and the patient is now presenting for care related to a residual effect or complication of that past burn. A first-degree corrosion involves only the epidermis, characterized by erythema and mild pain without blistering.

Use this code when documenting the long-term effects or complications arising from a previously sustained first-degree chemical burn to the neck. This applies to follow-up encounters where the primary reason for the visit is directly related to a sequela, such as persistent discoloration, scarring, or sensitivity, rather than the initial acute injury.

• Requires a seventh character 'S' for sequela, indicating a late effect.
• Do not use for initial treatment of an acute chemical burn; refer to acute corrosion codes.
• Always sequence this code after the code for the specific sequela being treated, if applicable.