Y99.8 — Other external cause status
Is Y99.8 billable?
Yes — Y99.8 is billable for FY2027. Y99.8 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. Y99.8 may be submitted for encounters from October 1, 2026 through September 30, 2027.
Y99.8 at a glance
| Code | Y99.8 |
|---|---|
| Description | Other external cause status |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
How is Y99.8 listed in the External Cause Index?
These are the routes through the External Cause of Injuries Index that lead to Y99.8 — how the injury happened, rather than what the injury was.
- External cause status › child assisting in compensated work for family
- External cause status › family member assisting in compensated work for other family member
- External cause status › hobby not done for income
- External cause status › leisure activity
- External cause status › off-duty activity of military personnel
- External cause status › recreation or sport not for income or while a student
- External cause status › specified NEC
- External cause status › student activity
- Status of external cause › child assisting in compensated work for family
- Status of external cause › family member assisting in compensated work for other family member
- Status of external cause › hobby not done for income
- Status of external cause › leisure activity
Excludes1 — never code together
The conditions below can never be reported together with Y99.8 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Inclusion terms
Alternative wording in documentation that is classified to Y99.8.
- Activity NEC
- Activity of child or other family member assisting in compensated work of other family member
- Hobby not done for income
- Leisure activity
- Off-duty activity of military personnel
- Recreation or sport not for income or while a student
- Student activity
How long has Y99.8 existed?
Y99.8 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.