Frostbite with tissue necrosis of unspecified arm, sequela

This code signifies a permanent complication or late effect resulting from frostbite that caused tissue death in an arm, where the specific arm (left or right) is not documented. It indicates that the patient is still experiencing issues directly attributable to the original frostbite injury, even after the acute phase has passed.

Apply this code when documenting a patient presenting with long-term sequelae such as chronic pain, nerve damage, scarring, or functional impairment in an arm, where the underlying cause was frostbite with tissue necrosis. This is appropriate for follow-up encounters addressing these persistent effects, not the initial acute injury.

• Requires a seventh character "S" to indicate sequela, meaning the patient is seen for a complication or late effect of the original injury.
• Do not use for acute frostbite; this code is exclusively for chronic or residual conditions.
• Ensure documentation clearly links the current arm condition to a past frostbite injury with tissue necrosis.