Tidal wave due to earthquake or volcanic eruption, sequela

This code signifies a long-term or late-occurring health condition resulting from a tidal wave (tsunami) that was caused by an earthquake or volcanic eruption. These sequelae can manifest months or years after the initial event, encompassing a wide range of physical and psychological impacts.

Apply this code when documenting a current health problem directly attributable to a past tsunami caused by seismic or volcanic activity. This includes chronic injuries, post-traumatic stress disorder (PTSD), or other delayed complications where the original cause was a tidal wave from an earthquake or volcanic eruption.

• Always use this code as a secondary diagnosis, following the code for the specific sequela being treated.
• Ensure documentation clearly links the current condition to a past tidal wave event caused by an earthquake or volcanic eruption.
• Do not use for acute injuries sustained during the initial tidal wave event; those would use acute injury codes with an external cause code for the initial disaster.