Corrosion of first degree of back of unsp hand, sequela

This code signifies a first-degree corrosion (chemical burn) affecting the dorsal aspect of an unspecified hand, where the acute injury has healed but residual effects or complications persist. First-degree corrosions involve only the epidermis, presenting with redness and mild pain without blistering. The "sequela" indicates that this code is used to report conditions that are a late effect of the original corrosion.

Use this code when documenting a patient presenting with a long-term consequence or complication directly attributable to a previously sustained first-degree chemical burn on the back of the hand. This could include persistent discoloration, altered sensation, or minor scarring that is being addressed after the initial healing phase. It is appropriate when the original acute injury is no longer being treated.

• Always assign an external cause code (V00-Y99) to describe the circumstances of the corrosion, if known.
• Do not use this code for active, acute first-degree corrosions; those require codes from the T23.0-T23.4 series with an appropriate seventh character for the encounter.
• Ensure documentation clearly supports the "sequela" aspect, indicating that the current condition is a residual effect of a past injury.