T44 Poisoning by, adverse effect of and underdosing of drugs primarily affecting the autonomic nervous system

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Poisoning by, adverse effect of and underdosing of drugs primarily affecting the autonomic nervous system is T44 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
T36-T50: Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50)
Category T44
88 codes (66 billable)
FY2026 Status
Stable since FY2024

Official Coding Guidelines

Sequence blood vessel/nerve injury first (fragment)

injury is to the blood vessels or nerves, that injury should be sequenced first.

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.19.b.2
Do not assign injury codes for iatrogenic injuries; code complication

3) Iatrogenic injuries Injury codes from Chapter 19 should not be assigned for injuries that occur during, or as a result of, a medical intervention. Assign the appropriate complication code(s).

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.19.b.3

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Cite This Page

Reference T44 with the canonical source and edition:

T44 — Poisoning by, adverse effect of and underdosing of drugs primarily affecting the autonomic nervous system. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/T44

Canonical URL: https://icd10codingpro.com/codes/T44

Related Codes

More Specific Codes

T44.0 Poisoning by, adverse effect of and underdosing of anticholinesterase agents T44.1 Poisoning by, adverse effect of and underdosing of other parasympathomimetics [cholinergics] T44.2 Poisoning by, adverse effect of and underdosing of ganglionic blocking drugs T44.3 Poisoning by, adverse effect of and underdosing of other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics T44.4 Poisoning by, adverse effect of and underdosing of predominantly alpha-adrenoreceptor agonists T44.5 Poisoning by, adverse effect of and underdosing of predominantly beta-adrenoreceptor agonists T44.6 Poisoning by, adverse effect of and underdosing of alpha-adrenoreceptor antagonists T44.7 Poisoning by, adverse effect of and underdosing of beta-adrenoreceptor antagonists T44.8 Poisoning by, adverse effect of and underdosing of centrally-acting and adrenergic-neuron- blocking agents T44.9 Poisoning by, adverse effect of and underdosing of other and unspecified drugs primarily affecting the autonomic nervous system

All Codes in T44

Every most-specific code under T44 Poisoning by, adverse effect of and underdosing of drugs primarily affecting the autonomic nervous system (66 codes):

Show the complete T44 code list
T44.0X1 Poisoning by anticholinesterase agents, accidental (unintentional) T44.0X2 Poisoning by anticholinesterase agents, intentional self-harm T44.0X3 Poisoning by anticholinesterase agents, assault T44.0X4 Poisoning by anticholinesterase agents, undetermined T44.0X5 Adverse effect of anticholinesterase agents T44.0X6 Underdosing of anticholinesterase agents T44.1X1 Poisoning by other parasympathomimetics [cholinergics], accidental (unintentional) T44.1X2 Poisoning by other parasympathomimetics [cholinergics], intentional self-harm T44.1X3 Poisoning by other parasympathomimetics [cholinergics], assault T44.1X4 Poisoning by other parasympathomimetics [cholinergics], undetermined T44.1X5 Adverse effect of other parasympathomimetics [cholinergics] T44.1X6 Underdosing of other parasympathomimetics [cholinergics] T44.2X1 Poisoning by ganglionic blocking drugs, accidental (unintentional) T44.2X2 Poisoning by ganglionic blocking drugs, intentional self-harm T44.2X3 Poisoning by ganglionic blocking drugs, assault T44.2X4 Poisoning by ganglionic blocking drugs, undetermined T44.2X5 Adverse effect of ganglionic blocking drugs T44.2X6 Underdosing of ganglionic blocking drugs T44.3X1 Poisoning by other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics, accidental (unintentional) T44.3X2 Poisoning by other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics, intentional self-harm T44.3X3 Poisoning by other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics, assault T44.3X4 Poisoning by other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics, undetermined T44.3X5 Adverse effect of other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics T44.3X6 Underdosing of other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics T44.4X1 Poisoning by predominantly alpha-adrenoreceptor agonists, accidental (unintentional) T44.4X2 Poisoning by predominantly alpha-adrenoreceptor agonists, intentional self-harm T44.4X3 Poisoning by predominantly alpha-adrenoreceptor agonists, assault T44.4X4 Poisoning by predominantly alpha-adrenoreceptor agonists, undetermined T44.4X5 Adverse effect of predominantly alpha-adrenoreceptor agonists T44.4X6 Underdosing of predominantly alpha-adrenoreceptor agonists T44.5X1 Poisoning by predominantly beta-adrenoreceptor agonists, accidental (unintentional) T44.5X2 Poisoning by predominantly beta-adrenoreceptor agonists, intentional self-harm T44.5X3 Poisoning by predominantly beta-adrenoreceptor agonists, assault T44.5X4 Poisoning by predominantly beta-adrenoreceptor agonists, undetermined T44.5X5 Adverse effect of predominantly beta-adrenoreceptor agonists T44.5X6 Underdosing of predominantly beta-adrenoreceptor agonists T44.6X1 Poisoning by alpha-adrenoreceptor antagonists, accidental (unintentional) T44.6X2 Poisoning by alpha-adrenoreceptor antagonists, intentional self-harm T44.6X3 Poisoning by alpha-adrenoreceptor antagonists, assault T44.6X4 Poisoning by alpha-adrenoreceptor antagonists, undetermined T44.6X5 Adverse effect of alpha-adrenoreceptor antagonists T44.6X6 Underdosing of alpha-adrenoreceptor antagonists T44.7X1 Poisoning by beta-adrenoreceptor antagonists, accidental (unintentional) T44.7X2 Poisoning by beta-adrenoreceptor antagonists, intentional self-harm T44.7X3 Poisoning by beta-adrenoreceptor antagonists, assault T44.7X4 Poisoning by beta-adrenoreceptor antagonists, undetermined T44.7X5 Adverse effect of beta-adrenoreceptor antagonists T44.7X6 Underdosing of beta-adrenoreceptor antagonists T44.8X1 Poisoning by centrally-acting and adrenergic-neuron-blocking agents, accidental (unintentional) T44.8X2 Poisoning by centrally-acting and adrenergic-neuron-blocking agents, intentional self-harm T44.8X3 Poisoning by centrally-acting and adrenergic-neuron-blocking agents, assault T44.8X4 Poisoning by centrally-acting and adrenergic-neuron-blocking agents, undetermined T44.8X5 Adverse effect of centrally-acting and adrenergic-neuron-blocking agents T44.8X6 Underdosing of centrally-acting and adrenergic-neuron-blocking agents T44.901 Poisoning by unspecified drugs primarily affecting the autonomic nervous system, accidental (unintentional) T44.902 Poisoning by unspecified drugs primarily affecting the autonomic nervous system, intentional self-harm T44.903 Poisoning by unspecified drugs primarily affecting the autonomic nervous system, assault T44.904 Poisoning by unspecified drugs primarily affecting the autonomic nervous system, undetermined T44.905 Adverse effect of unspecified drugs primarily affecting the autonomic nervous system T44.906 Underdosing of unspecified drugs primarily affecting the autonomic nervous system T44.991 Poisoning by other drug primarily affecting the autonomic nervous system, accidental (unintentional) T44.992 Poisoning by other drug primarily affecting the autonomic nervous system, intentional self-harm T44.993 Poisoning by other drug primarily affecting the autonomic nervous system, assault T44.994 Poisoning by other drug primarily affecting the autonomic nervous system, undetermined T44.995 Adverse effect of other drug primarily affecting the autonomic nervous system T44.996 Underdosing of other drug primarily affecting the autonomic nervous system
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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