T44.991
⚠ Non-billable
Poisoning by other drug primarily affecting the autonomic nervous system, accidental (unintentional)
ICD-10-CM · FY2026 · Injury, Poisoning and Certain Other Consequences of External Causes
Code
T44.991
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Injury, Poisoning and Certain Other Consequences of External Causes
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code T44.991?
ICD-10-CM code T44.991 represents Poisoning by other drug primarily affecting the autonomic nervous system, accidental (unintentional). It is a non-billable header code requiring a more specific subcategory in the Injury, Poisoning and Certain Other Consequences of External Causes chapter, effective October 1, 2025 – September 30, 2026.
Is T44.991 billable?
No. T44.991 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is T44.991 in?
T44.991 belongs to the Injury, Poisoning and Certain Other Consequences of External Causes chapter (S00–T88) of ICD-10-CM.
Related codes in the T44 category
T44
Poisoning by, adverse effect of and underdosing of drugs primarily affecting the autonomic nervous system
Non-billable
T44.0
Poisoning by, adverse effect of and underdosing of anticholinesterase agents
Non-billable
T44.1
Poisoning by, adverse effect of and underdosing of other parasympathomimetics [cholinergics]
Non-billable
T44.2
Poisoning by, adverse effect of and underdosing of ganglionic blocking drugs
Non-billable
T44.3
Poisoning by, adverse effect of and underdosing of other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics
Non-billable
T44.4
Poisoning by, adverse effect of and underdosing of predominantly alpha-adrenoreceptor agonists
Non-billable
T44.5
Poisoning by, adverse effect of and underdosing of predominantly beta-adrenoreceptor agonists
Non-billable
T44.6
Poisoning by, adverse effect of and underdosing of alpha-adrenoreceptor antagonists
Non-billable
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