Corros third degree of unsp mult fngr, not inc thumb, sqla

This code signifies a third-degree chemical burn, also known as a corrosion, affecting multiple fingers excluding the thumb. The injury has progressed to a sequela stage, meaning it represents a late effect or complication of the initial burn rather than an acute injury. This indicates permanent damage such as scarring, contractures, or functional impairment resulting from the original corrosive exposure.

Use this code when documenting a patient presenting with a long-term complication or residual effect from a third-degree chemical burn to multiple fingers (excluding the thumb). This applies to situations where the acute phase of the injury has resolved, and the current encounter addresses the lasting consequences. Examples include follow-up for scar revision, management of chronic pain, or treatment of limited range of motion due to the past corrosion.

• Always assign an external cause code (V00-Y99) in conjunction with this sequela code to describe the circumstances of the original injury.
• Do not use this code for acute third-degree chemical burns; instead, refer to the appropriate T23.3- series for initial encounters.
• Ensure documentation clearly specifies "multiple fingers" and excludes the thumb, and that the burn is explicitly identified as a corrosion and a sequela.