Immersion hand, left hand, initial encounter

This code signifies a cold-induced injury to the left hand, specifically due to prolonged exposure to cold, wet conditions without freezing. This condition, also known as trench hand, results in nerve and vascular damage, leading to pain, numbness, swelling, and potential tissue damage.

Apply this code for the initial diagnosis and treatment of a patient presenting with symptoms of immersion injury affecting their left hand. This is appropriate when the patient's history confirms sustained exposure to cold, non-freezing water or damp environments.

• Ensure documentation clearly specifies the left hand as the affected extremity.
• Confirm the encounter is the first time the patient is being seen for this specific immersion injury.
• Differentiate from frostbite, which involves tissue freezing and has distinct coding.