Corros 2nd deg mul site of l shldr/up lmb, ex wrs/hnd, sqla

This code signifies a second-degree chemical burn (corrosion) affecting multiple areas of the patient's left shoulder and upper limb, excluding the wrist and hand. The "S" suffix indicates that this is a sequela, meaning it represents a complication or condition arising as a direct result of an initial injury that has already healed or been treated.

Use this code when documenting a chronic or late effect of a second-degree chemical burn to the specified left upper limb areas. This would apply to follow-up encounters for complications such as scarring, contractures, or persistent pain directly attributable to the original burn, long after the acute phase has passed.

• Always ensure the documentation clearly links the current condition as a sequela of a past second-degree chemical burn.
• Do not use this code for acute burns; a different code from the T22 category would be appropriate for the initial encounter.
• Verify that "multiple sites" within the left shoulder and upper limb (excluding wrist/hand) are affected, as specified by the code.