Corros 1st deg mult site of l shldr/up lmb, ex wrs/hnd, sqla

This code indicates a first-degree corrosion (e.g., chemical burn) affecting multiple areas of the patient's left shoulder and upper arm, excluding the wrist and hand. The "S" at the end signifies that this is a sequela, meaning it's a late effect or complication of an initial injury that has already healed or is no longer acute.

Use this code when documenting a chronic scar, contracture, or other long-term consequence resulting from a first-degree chemical burn that occurred on multiple sites of the left shoulder and upper limb (excluding the wrist and hand). This applies when the original acute injury is no longer being treated.

• Always assign this code as a secondary diagnosis, following the code for the nature of the sequela (e.g., scar, contracture).
• Ensure the documentation clearly specifies "first degree" corrosion and involvement of "multiple sites" within the left shoulder and upper limb, excluding the hand and wrist.
• Verify that the encounter is for the treatment of the late effect of the corrosion, not the acute injury itself.