Corrosion of first degree of left upper arm, sequela

This code indicates a first-degree chemical burn, also known as a corrosion, affecting the left upper arm. A first-degree burn involves only the outermost layer of skin (epidermis), causing redness, mild swelling, and pain, but no blistering. The "sequela" designation means this code is used for complications or conditions that arise as a direct result of the original corrosion, after the acute phase has passed.

This code is appropriate when documenting a long-term effect or complication stemming from a first-degree chemical burn to the left upper arm. Examples include persistent discoloration, scarring (even if minimal), or chronic sensitivity in the affected area, after the initial injury has healed. It should be used for follow-up encounters related to these residual issues.

• Always assign an external cause code (V00-Y99) in conjunction with this code to describe the circumstances of the corrosion.
• Do not use this code for the initial encounter or active treatment of the acute first-degree corrosion; use the acute phase code instead.
• Ensure documentation clearly supports the "sequela" status, indicating that the current condition is a residual effect of a past corrosion.