Chapter 20: External causes of morbidity
V00-Y99
Chapter 20 of the ICD-10-CM tabular list covers external causes of morbidity, codes V00-Y99. It holds 10,602 codes across 7 blocks, of which 7,461 are billable and 3,141 are header codes that cannot go on a claim. 10,008 (94%) require a 7th character.
Notes
Additional guidance from the ICD-10-CM tabular list.
- This chapter permits the classification of environmental events and circumstances as the cause of injury, and other adverse effects. Where a code from this section is applicable, it is intended that it shall be used secondary to a code from another chapter of the Classification indicating the nature of the condition. Most often, the condition will be classifiable to Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88). Other conditions that may be stated to be due to external causes are classified in Chapters I to XVIII. For these conditions, codes from Chapter 20 should be used to provide additional information as to the cause of the condition.
Risk adjustment in Chapter 20
43 of this chapter’s codes map to a CMS-HCC, which means the diagnosis carries a risk-adjustment payment when it is documented and coded to the level the record supports.
- HCC 155 Major Depression, Moderate or Severe, without Psychosis
Blocks in this chapter
- V00-X58Accidents8,040 codes
- X71-X83Intentional self-harm181 codes
- X92-Y09Assault283 codes
- Y21-Y33Event of undetermined intent145 codes
- Y35-Y38Legal intervention, operations of war, military operations, and terrorism1,421 codes
- Y62-Y84Complications of medical and surgical care136 codes
- Y90-Y99Supplementary factors related to causes of morbidity classified elsewhere396 codes