Other specified effects of reduced temperature

This code signifies various adverse health effects resulting from exposure to cold temperatures that are not specifically classified elsewhere. It encompasses conditions like chilblains (pernio), immersion foot (trench foot), and other localized cold injuries that do not involve tissue necrosis or systemic hypothermia. These conditions typically manifest as inflammatory lesions, nerve damage, or circulatory disturbances in affected areas.

Apply this code when documentation specifies a cold-related injury such as chilblains, pernio, immersion foot, or trench foot. It is appropriate for localized cold injuries where the tissue remains viable and there is no evidence of frostbite (tissue destruction) or systemic hypothermia. Documentation should clearly indicate the cause as reduced temperature exposure and describe the specific manifestation.

• Differentiate carefully from frostbite (991.0-991.6), which involves tissue freezing and destruction.
• Do not use for systemic hypothermia (991.6) or generalized effects of cold.
• Ensure documentation specifies the type of localized cold injury to support this code.