Immersion foot, unspecified foot, subsequent encounter

This code signifies a non-freezing cold injury to an unspecified foot, characterized by nerve and vascular damage due to prolonged exposure to cold, wet conditions. It typically presents with numbness, pain, swelling, and skin changes, but without actual tissue freezing.

Apply this code when documenting follow-up care for a patient with immersion foot affecting an unspecific foot, after the initial treatment phase. This includes subsequent office visits, wound care, or physical therapy sessions related to the ongoing management of the condition.

• Ensure the documentation clearly indicates an unspecified foot (e.g., "immersion foot, left or right not specified").
• Confirm the encounter is for follow-up care or healing phase, not the initial presentation.
• Distinguish from frostbite (T33-T34) which involves actual tissue freezing.