Forest as the place of occurrence of the external cause

This code specifies that an injury or adverse event occurred within a forested area. It indicates the geographical setting where the external cause of a patient's condition originated, rather than the nature of the injury itself.

Apply this code when documentation clearly states the patient's injury or exposure happened in a forest, woods, or similar heavily wooded natural environment. This would include incidents like falls during hiking, animal bites, or exposure to environmental hazards occurring specifically within a forest.

• Always assign this code as a secondary code, following the primary external cause code (e.g., W01 for fall).
• Ensure the medical record explicitly documents "forest," "woods," or a similar term for the place of occurrence.
• Do not use for incidents occurring in parks that are not predominantly forested, or in urban green spaces.