ICD-10-CM › V00-Y99 › Y90-Y99 › Y99 External cause status › Y99.9
Y99.9
Unspecified external cause status
ValidICD-10-CM diagnosis code.
Valid for claims with a date of service in the current code year.
What has happened to this code
Every change the publisher made, from 2010 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.
- FY2010 Added to the draft code set draft Unspecified external cause status
Official coding rules
Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.
Inherited from Y99 External cause status
Note
- 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.
Inherited from the Y90-Y99 section Supplementary factors related to causes of morbidity classified elsewhere (Y90-Y99)
Note
- These categories may be used to provide supplementary information concerning causes of morbidity. They are not to be used for single-condition coding.
How CDC's index refers to this code
Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.
- External cause status
- Status of external cause
Codes in the same group
| Code | Description | Status |
|---|---|---|
| Y99.0 | Civilian activity done for income or pay | Valid |
| Y99.1 | Military activity | Valid |
| Y99.2 | Volunteer activity | Valid |
| Y99.8 | Other external cause status | Valid |