Frostbite w tissue necros left knee and lower leg, sequela

This code signifies a chronic or residual condition resulting from frostbite that caused tissue death (necrosis) in the left knee and/or lower leg. It indicates that the patient is experiencing ongoing effects or complications directly attributable to this past frostbite injury.

Use this code when documenting long-term sequelae such as chronic pain, nerve damage, non-healing ulcers, or amputation status directly related to a previous frostbite injury with tissue necrosis of the left knee and lower leg. This code is appropriate for encounters addressing the lasting impact, not the initial acute injury.

• Always assign an additional code(s) to specify the exact nature of the sequela (e.g., chronic pain, non-healing ulcer).
• Ensure documentation clearly links the current condition to the past frostbite with necrosis of the left knee/lower leg.
• Do not use this code for acute frostbite; instead, refer to the acute frostbite codes in the T33-T34 range without the "S" seventh character.