Blizzard (snow)(ice), subsequent encounter

This code signifies an injury or adverse health effect sustained due to exposure to a blizzard, which includes conditions involving heavy snow and/or ice. The "subsequent encounter" designation indicates that the patient is receiving follow-up care for an injury that occurred during a previous encounter related to the blizzard.

This code is appropriate for patients presenting for ongoing treatment, such as wound care, physical therapy, or medication management, for injuries like frostbite, hypothermia, fractures, or sprains that were initially sustained during a blizzard. It should be used when the patient is no longer in the acute phase of treatment for the original blizzard-related injury.

• Always use in conjunction with an external cause code (e.g., W00-W19 for falls, T33-T34 for frostbite) to specify the nature of the injury.
• Ensure the "subsequent encounter" seventh character is appropriate for the patient's current stage of care.
• Distinguish from "initial encounter" (A) for the first time a patient is seen for the injury, and "sequela" (S) for complications or conditions arising as a direct result of the injury.