Corros 3rd deg mu site of l shldr/up lmb, ex wrs/hnd, sqla

This code signifies a third-degree chemical burn, also known as corrosion, affecting multiple areas of the patient's left shoulder and upper limb, excluding the wrist and hand. Third-degree corrosions involve full-thickness tissue destruction, extending through the epidermis and dermis, and potentially into subcutaneous tissue, muscle, or bone. The "sequela" designation indicates that this code is used for complications or conditions arising directly from the original corrosion, after the acute phase of the injury has passed.

Use this code when documenting long-term complications, scarring, contractures, chronic pain, or other persistent issues directly resulting from a third-degree chemical burn to multiple sites of the left shoulder and upper limb (excluding wrist and hand). This code is appropriate for follow-up visits and ongoing management of these residual effects.

• Always assign an external cause code (V00-Y99) to identify the circumstances of the corrosion.
• Do not use this code for acute third-degree corrosions; instead, use the appropriate acute T22.3- codes.
• Ensure documentation clearly links the current condition to the previous third-degree corrosion and specifies the affected body areas.