T44.991 — Poisoning by other drug primarily affecting the autonomic nervous system, accidental (unintentional)
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
T44.991 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
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
Related codes at this level
Codes that share T44.99. If T44.991 is not quite right, the correct code is usually one of these.
- 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
Questions about T44.991
- Is T44.991 a billable ICD-10-CM code?
- No. T44.991 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does T44.991 sit in the tabular list?
- Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50).