T58.93
T58.93: Toxic effect of carbon monoxide from unspecified source, assault
Non-billable headerICD-10-CM
T58.93 is a non-billable header ICD-10-CM code for toxic effect of carbon monoxide from unspecified source, assault. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.
This code requires a 7th character
The appropriate 7th character is to be added to each code from category T58
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Other codes that can never be billed with T58.93
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 T58.93
3 child codes. Green means billable.