T50.Z9
T50.Z9: Poisoning by, adverse effect of and underdosing of other vaccines and biological substances
Non-billable headerICD-10-CM
T50.Z9 is a non-billable header ICD-10-CM code for poisoning by, adverse effect of and underdosing of other vaccines and biological substances. 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 T50
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
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 T50.Z9
6 child codes. Green means billable.
- T50.Z91Poisoning by other vaccines and biological substances, accidental (unintentional)
- T50.Z92Poisoning by other vaccines and biological substances, intentional self-harm
- T50.Z93Poisoning by other vaccines and biological substances, assault
- T50.Z94Poisoning by other vaccines and biological substances, undetermined
- T50.Z95Adverse effect of other vaccines and biological substances
- T50.Z96Underdosing of other vaccines and biological substances