Instruction Source: Y99.0
Civilian activity done for income or pay
Excludes 1 (Mutually Exclusive)
- military activity (Y99.1)
- volunteer activity (Y99.2)
Instruction Source: Y99
External cause status
Clinical Notes
- A single code from category Y99 should be used in conjunction with the external cause code(s) assigned to a record to indicate the status of the person at the time the event occurred.
Instruction Source: Y90-Y99
Supplementary factors related to causes of morbidity classified elsewhere (Y90-Y99)
Clinical Notes
- These categories may be used to provide supplementary information concerning causes of morbidity. They are not to be used for single-condition coding.
Instruction Source: V00-Y99
External causes of morbidity
Clinical Notes
- 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.