T44.991
T44.991: Poisoning by other drug primarily affecting the autonomic nervous system, accidental (unintentional)
Non-billable headerICD-10-CM
T44.991 is a non-billable header ICD-10-CM code for poisoning by other drug primarily affecting the autonomic nervous system, accidental (unintentional). 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 T44
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Poisoning by other drugs primarily affecting the autonomic nervous system NOS
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 T44.991
3 child codes. Green means billable.
- T44.991APoisoning by other drug primarily affecting the autonomic nervous system, accidental (unintentional), initial encounter
- T44.991DPoisoning by other drug primarily affecting the autonomic nervous system, accidental (unintentional), subsequent encounter
- T44.991SPoisoning by other drug primarily affecting the autonomic nervous system, accidental (unintentional), sequela
Other codes under T44.99
- T44.992Poisoning by other drug primarily affecting the autonomic nervous system, intentional self-harm
- T44.993Poisoning by other drug primarily affecting the autonomic nervous system, assault
- T44.994Poisoning by other drug primarily affecting the autonomic nervous system, undetermined
- T44.995Adverse effect of other drug primarily affecting the autonomic nervous system
- T44.996Underdosing of other drug primarily affecting the autonomic nervous system