V00-Y99
External causes of morbidity
Chapter coding notes
(V00-X58) Accidents (V00-X58) (V00-V99) Transport accidents (V00-V99) Excludes1: agricultural vehicles in stationary use or maintenance (W31.-) assault by crashing of motor vehicle (Y03.-) automobile or motor cycle in stationary use or maintenance- code to type of accident crashing of motor vehicle, undetermined intent (Y32) intentional self-harm by crashing of motor vehicle (X82) Excludes2: transport accidents due to cataclysm (X34-X38) Use Additional Code: code to identify: Airbag injury (W22.1) Type of street or road (Y92.4-) Use of cellular telephone and other electronic equipment at the time of the transport accident (Y93.C-) Notes: This section is structured in 12 groups. Those relating to land transport accidents (V00-V89) reflect the victim's mode of transport and are subdivided to identify the victim's 'counterpart' or the type of event. The vehicle of which the injured person is an occupant is identified in the first two characters since it is seen as the most important factor to identify for prevention purposes. A transport accident is one in which the vehicle involved must be moving or running or in use for transport purposes at the time of the accident. (W00-X58) Other external causes of accidental injury (W00-X58) (Y62-Y84) Complications of medical and surgical care (Y62-Y84) Includes: complications of medical devices surgical and medical procedures as the cause of abnormal reaction of the patient, or of later complication, without mention of misadventure at the time of the procedure
Blocks in this chapter
V00-V09
Pedestrian injured in transport accident
V10-V19
Pedal cycle rider injured in transport accident
V20-V29
Motorcycle rider injured in transport accident
V30-V39
Occupant of three-wheeled motor vehicle injured in transport accident
V40-V49
Car occupant injured in transport accident
V50-V59
Occupant of pick-up truck or van injured in transport accident
V60-V69
Occupant of heavy transport vehicle injured in transport accident
V70-V79
Bus occupant injured in transport accident
V80-V89
Other land transport accidents
V90-V94
Water transport accidents
V95-V97
Air and space transport accidents
V98-V99
Other and unspecified transport accidents
W00-W19
Slipping, tripping, stumbling and falls
W20-W49
Exposure to inanimate mechanical forces
W50-W64
Exposure to animate mechanical forces
W65-W74
Accidental non-transport drowning and submersion
W85-W99
Exposure to electric current, radiation and extreme ambient air temperature and pressure
X00-X08
Exposure to smoke, fire and flames
X10-X19
Contact with heat and hot substances
X30-X39
Exposure to forces of nature
X50
Overexertion and strenuous or repetitive movements
X52-X58
Accidental exposure to other specified factors
X71-X83
Intentional self-harm
X92-Y09
Assault
Y21-Y33
Event of undetermined intent
Y35-Y38
Legal intervention, operations of war, military operations, and terrorism
Y62-Y69
Misadventures to patients during surgical and medical care
Y70-Y82
Medical devices associated with adverse incidents in diagnostic and therapeutic use
Y83-Y84
Surgical and other medical procedures as the cause of abnormal reaction of the patient, or of later complication, without mention of misadventure at the time of the procedure
Y90-Y99
Supplementary factors related to causes of morbidity classified elsewhere
Official Guidelines for Chapter 20
FY 2026 ›Subsections
- I.C.20.aGeneral External Cause Coding Guidelines
- I.C.20.bPlace of Occurrence Guideline
- I.C.20.cActivity Code
- I.C.20.dPlace of Occurrence, Activity, and Status Codes Used with other
- I.C.20.eIf the Reporting Format Limits the Number of External Cause Codes
- I.C.20.fMultiple External Cause Coding Guidelines
- I.C.20.gChild and Adult Abuse Guideline
- I.C.20.hUnknown or Undetermined Intent Guideline
- I.C.20.iSequelae (Late Effects) of External Cause Guidelines
- I.C.20.jTerrorism Guidelines
- I.C.20.kExternal Cause Status
Sections that reference codes in Chapter 20
- I.B.19.bSequencing of External Causes of Morbidity CodesX37.0General rules
- I.B.19.cOther External Causes of Morbidity Code IssuesX37.0General rules
- I.C.2.c.2)Anemia associated with chemotherapy, immunotherapy and radiation therapyY84.2Chapter 2 guidance
- I.C.5.b.5)Blood Alcohol LevelY90Chapter 5 guidance
- I.C.19.e.5)(c)UnderdosingY63.6-Y63.9Chapter 19 guidance
- I.C.19.fAdult and child abuse, neglect and other maltreatmentX92-Y09Chapter 19 guidance
- I.C.20.bPlace of Occurrence GuidelineY92
- I.C.20.cActivity CodeY93
Showing 8 of 13 sections that reference this range. Browse all FY 2026 guidelines.