Corrosion of first degree of back of left hand, sequela

This code signifies a healed or residual effect from a first-degree corrosion (chemical burn) that occurred on the back of the patient's left hand. A first-degree corrosion involves only the outermost layer of skin, typically presenting with redness and mild pain, and the "sequela" indicates that the acute injury has resolved, but there are lasting consequences or a chronic condition resulting from it.

Use this code when documenting a patient presenting with a long-term complication or residual condition directly attributable to a past first-degree chemical burn on the back of their left hand. This would apply to follow-up encounters where the original injury is no longer acute, but its lasting effects are being addressed, such as persistent discoloration, scarring, or sensitivity.

• Always assign a secondary code to describe the specific nature of the sequela (e.g., scar, dyspigmentation).
• Ensure documentation clearly links the current condition to the previous first-degree corrosion.
• Do not use this code for acute or active first-degree chemical burns; those require acute injury codes.