Monday, November 2, 2026

Getting on or off a bus shouldn't involve a collision with a heavy transport vehicle, but ICD-10-CM code V74.4XXS exists for when it does. This highly specific external cause code tracks a passenger who was injured while boarding or alighting a bus that collided with another bus or heavy vehicle, specifically reporting the late effects of that injury. Notice the two placeholder X's filling the fifth and sixth character slots to ensure the mandatory 7th character sequela extension lands in position seven. Using V74.4XXS allows public safety and epidemiological systems to capture precise data on passenger transit accidents.