Y99
Y99: External cause status
Non-billable headerICD-10-CM
Y99 is a non-billable header ICD-10-CM code for external cause status. It cannot be billed on its own: choose one of the more specific child codes below.
Notes
Additional guidance from the ICD-10-CM tabular list.
- 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.
Other codes that can never be billed with Y99
Their own Excludes1 notes name this code, so the conflict is not listed above.
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Code history
Unchanged in every release from FY2024 to FY2027.
Code to one of these instead Y99
5 child codes. Green means billable.