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ICD-10-CM 2027 diagnosis code

V66.4Person boarding or alighting a heavy transport vehicle injured in collision with other nonmotor vehicle

Not billable — use a more specific codeRequires 7th character

V66.4 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it and add the required 7th character.Short description: Prsn brd/alit hv veh injured in collision w nonmtr vehicle

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About V66.4

V66.4 is the ICD-10-CM diagnosis code for person boarding or alighting a heavy transport vehicle injured in collision with other nonmotor vehicle. It belongs to category V66 (occupant of heavy transport vehicle injured in collision with other nonmotor vehicle), block V60-V69 (occupant of heavy transport vehicle injured in transport accident) and chapter 20 (external causes of morbidity). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within V66, choose V66.4 (Person boarding or alighting a heavy transport vehicle injured in collision with other nonmotor vehicle) only when documentation doesn't support a more specific option: driver of heavy transport vehicle injured in collision with other nonmotor vehicle in nontraffic accident (V66.0), passenger in heavy transport vehicle injured in collision with other nonmotor vehicle in nontraffic accident (V66.1), person on outside of heavy transport vehicle injured in collision with other nonmotor vehicle in nontraffic accident (V66.2), unspecified occupant of heavy transport vehicle injured in collision with other nonmotor vehicle in nontraffic accident (V66.3), driver of heavy transport vehicle injured in collision with other nonmotor vehicle in traffic accident (V66.5), passenger in heavy transport vehicle injured in collision with other nonmotor vehicle in traffic accident (V66.6), person on outside of heavy transport vehicle injured in collision with other nonmotor vehicle in traffic accident (V66.7) and unspecified occupant of heavy transport vehicle injured in collision with other nonmotor vehicle in traffic accident (V66.9).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

7th character

The appropriate 7th character is to be added to each code from category V66

Notes that apply from higher levels

Instructions written at a parent level also apply to V66.4.

› From V66 Occupant of heavy transport vehicle injured in collision with other nonmotor vehicle
Includes
  • collision with animal-drawn vehicle, animal being ridden, streetcar

Broader instructions also apply from V60-V69 Occupant of heavy transport vehicle injured in transport accident and Chapter 20: External causes of morbidity.

Alphabetic index entries

4 entries

Terms in the official ICD-10-CM index that lead to V66.4.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about V66.4

Is V66.4 billable?

No. V66.4 is a header code. Report one of its more specific subcodes instead.