ICD-10-CM 2027 diagnosis code
T44Poisoning by, adverse effect of and underdosing of drugs primarily affecting the autonomic nervous system
Not billable — use a more specific code
T44 is a header code, so it can't be reported by itself. Choose one of the 10 more specific codes beneath it.Short description: Drugs primarily affecting the autonomic nervous system
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About T44
T44 is the ICD-10-CM diagnosis code for poisoning by, adverse effect of and underdosing of drugs primarily affecting the autonomic nervous system. It belongs to block T36-T50 (poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 10 subcodes must be used instead.
To report this condition, pick the subcode that matches the documentation: T44.0 (agents), T44.1 ([cholinergics]), T44.2 (drugs), T44.3 (spasmolytics), T44.4 (agonists), T44.5 (agonists), T44.6 (antagonists), T44.7 (antagonists) and 2 more.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under T44
- T44.0Poisoning by, adverse effect of and underdosing of anticholinesterase agents
- T44.0XPoisoning by, adverse effect of and underdosing of anticholinesterase agents
- T44.0X1Poisoning by anticholinesterase agents, accidental (unintentional)
- T44.0X2Poisoning by anticholinesterase agents, intentional self-harm
- T44.0X3Poisoning by anticholinesterase agents, assault
- T44.0X4Poisoning by anticholinesterase agents, undetermined
- T44.0X5Adverse effect of anticholinesterase agents
- T44.0X6Underdosing of anticholinesterase agents
- T44.0XPoisoning by, adverse effect of and underdosing of anticholinesterase agents
- T44.1Poisoning by, adverse effect of and underdosing of other parasympathomimetics [cholinergics]
- T44.1XPoisoning by, adverse effect of and underdosing of other parasympathomimetics [cholinergics]
- T44.1X1Poisoning by other parasympathomimetics [cholinergics], accidental (unintentional)
- T44.1X2Poisoning by other parasympathomimetics [cholinergics], intentional self-harm
- T44.1X3Poisoning by other parasympathomimetics [cholinergics], assault
- T44.1X4Poisoning by other parasympathomimetics [cholinergics], undetermined
- T44.1X5Adverse effect of other parasympathomimetics [cholinergics]
- T44.1X6Underdosing of other parasympathomimetics [cholinergics]
- T44.1XPoisoning by, adverse effect of and underdosing of other parasympathomimetics [cholinergics]
- T44.2Poisoning by, adverse effect of and underdosing of ganglionic blocking drugs
- T44.2XPoisoning by, adverse effect of and underdosing of ganglionic blocking drugs
- T44.2X1Poisoning by ganglionic blocking drugs, accidental (unintentional)
- T44.2X2Poisoning by ganglionic blocking drugs, intentional self-harm
- T44.2X3Poisoning by ganglionic blocking drugs, assault
- T44.2X4Poisoning by ganglionic blocking drugs, undetermined
- T44.2X5Adverse effect of ganglionic blocking drugs
- T44.2X6Underdosing of ganglionic blocking drugs
- T44.2XPoisoning by, adverse effect of and underdosing of ganglionic blocking drugs
- T44.3Poisoning by, adverse effect of and underdosing of other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics
- T44.3XPoisoning by, adverse effect of and underdosing of other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics
- T44.3X1Poisoning by other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics, accidental (unintentional)
- T44.3X2Poisoning by other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics, intentional self-harm
- T44.3X3Poisoning by other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics, assault
- T44.3X4Poisoning by other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics, undetermined
- T44.3X5Adverse effect of other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics
- T44.3X6Underdosing of other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics
- T44.3XPoisoning by, adverse effect of and underdosing of other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics
- T44.4Poisoning by, adverse effect of and underdosing of predominantly alpha-adrenoreceptor agonists
- T44.4XPoisoning by, adverse effect of and underdosing of predominantly alpha-adrenoreceptor agonists
- T44.4X1Poisoning by predominantly alpha-adrenoreceptor agonists, accidental (unintentional)
- T44.4X2Poisoning by predominantly alpha-adrenoreceptor agonists, intentional self-harm
- T44.4X3Poisoning by predominantly alpha-adrenoreceptor agonists, assault
- T44.4X4Poisoning by predominantly alpha-adrenoreceptor agonists, undetermined
- T44.4X5Adverse effect of predominantly alpha-adrenoreceptor agonists
- T44.4X6Underdosing of predominantly alpha-adrenoreceptor agonists
- T44.4XPoisoning by, adverse effect of and underdosing of predominantly alpha-adrenoreceptor agonists
- T44.5Poisoning by, adverse effect of and underdosing of predominantly beta-adrenoreceptor agonists
- T44.5XPoisoning by, adverse effect of and underdosing of predominantly beta-adrenoreceptor agonists
- T44.5X1Poisoning by predominantly beta-adrenoreceptor agonists, accidental (unintentional)
- T44.5X2Poisoning by predominantly beta-adrenoreceptor agonists, intentional self-harm
- T44.5X3Poisoning by predominantly beta-adrenoreceptor agonists, assault
- T44.5X4Poisoning by predominantly beta-adrenoreceptor agonists, undetermined
- T44.5X5Adverse effect of predominantly beta-adrenoreceptor agonists
- T44.5X6Underdosing of predominantly beta-adrenoreceptor agonists
- T44.5XPoisoning by, adverse effect of and underdosing of predominantly beta-adrenoreceptor agonists
- T44.6Poisoning by, adverse effect of and underdosing of alpha-adrenoreceptor antagonists
- T44.6XPoisoning by, adverse effect of and underdosing of alpha-adrenoreceptor antagonists
- T44.6X1Poisoning by alpha-adrenoreceptor antagonists, accidental (unintentional)
- T44.6X2Poisoning by alpha-adrenoreceptor antagonists, intentional self-harm
- T44.6X3Poisoning by alpha-adrenoreceptor antagonists, assault
- T44.6X4Poisoning by alpha-adrenoreceptor antagonists, undetermined
- T44.6X5Adverse effect of alpha-adrenoreceptor antagonists
- T44.6X6Underdosing of alpha-adrenoreceptor antagonists
- T44.6XPoisoning by, adverse effect of and underdosing of alpha-adrenoreceptor antagonists
- T44.7Poisoning by, adverse effect of and underdosing of beta-adrenoreceptor antagonists
- T44.7XPoisoning by, adverse effect of and underdosing of beta-adrenoreceptor antagonists
- T44.7X1Poisoning by beta-adrenoreceptor antagonists, accidental (unintentional)
- T44.7X2Poisoning by beta-adrenoreceptor antagonists, intentional self-harm
- T44.7X3Poisoning by beta-adrenoreceptor antagonists, assault
- T44.7X4Poisoning by beta-adrenoreceptor antagonists, undetermined
- T44.7X5Adverse effect of beta-adrenoreceptor antagonists
- T44.7X6Underdosing of beta-adrenoreceptor antagonists
- T44.7XPoisoning by, adverse effect of and underdosing of beta-adrenoreceptor antagonists
- T44.8Poisoning by, adverse effect of and underdosing of centrally-acting and adrenergic-neuron- blocking agents
- T44.8XPoisoning by, adverse effect of and underdosing of centrally-acting and adrenergic- neuron-blocking agents
- T44.8X1Poisoning by centrally-acting and adrenergic-neuron-blocking agents, accidental (unintentional)
- T44.8X2Poisoning by centrally-acting and adrenergic-neuron-blocking agents, intentional self-harm
- T44.8X3Poisoning by centrally-acting and adrenergic-neuron-blocking agents, assault
- T44.8X4Poisoning by centrally-acting and adrenergic-neuron-blocking agents, undetermined
- T44.8X5Adverse effect of centrally-acting and adrenergic-neuron-blocking agents
- T44.8X6Underdosing of centrally-acting and adrenergic-neuron-blocking agents
- T44.8XPoisoning by, adverse effect of and underdosing of centrally-acting and adrenergic- neuron-blocking agents
- T44.9Poisoning by, adverse effect of and underdosing of other and unspecified drugs primarily affecting the autonomic nervous system
- T44.90Poisoning by, adverse effect of and underdosing of unspecified drugs primarily affecting the autonomic nervous system
- T44.901Poisoning by unspecified drugs primarily affecting the autonomic nervous system, accidental (unintentional)
- T44.902Poisoning by unspecified drugs primarily affecting the autonomic nervous system, intentional self-harm
- T44.903Poisoning by unspecified drugs primarily affecting the autonomic nervous system, assault
- T44.904Poisoning by unspecified drugs primarily affecting the autonomic nervous system, undetermined
- T44.905Adverse effect of unspecified drugs primarily affecting the autonomic nervous system
- T44.906Underdosing of unspecified drugs primarily affecting the autonomic nervous system
- T44.99Poisoning by, adverse effect of and underdosing of other drugs primarily affecting the autonomic nervous system
- T44.991Poisoning by other drug primarily affecting the autonomic nervous system, accidental (unintentional)
- 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
- T44.90Poisoning by, adverse effect of and underdosing of unspecified drugs primarily affecting the autonomic nervous system
Notes that apply from higher levels
Instructions written at a parent level also apply to T44.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about T44
Is T44 billable?
- No. T44 is a header code. Report one of its more specific subcodes instead.