T44 — Poisoning by, adverse effect of and underdosing of drugs primarily affecting the autonomic nervous system
Not billable
Is T44 billable?
No — T44 is a non-billable header code. T44 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 60 billable codes beneath T44.
Billable codes under this header
- T44.0X1APoisoning by anticholinesterase agents, accidental (unintentional), initial encounter
- T44.0X1DPoisoning by anticholinesterase agents, accidental (unintentional), subsequent encounter
- T44.0X1SPoisoning by anticholinesterase agents, accidental (unintentional), sequela
- T44.0X2APoisoning by anticholinesterase agents, intentional self-harm, initial encounter
- T44.0X2DPoisoning by anticholinesterase agents, intentional self-harm, subsequent encounter
- T44.0X2SPoisoning by anticholinesterase agents, intentional self-harm, sequela
- T44.0X3APoisoning by anticholinesterase agents, assault, initial encounter
- T44.0X3DPoisoning by anticholinesterase agents, assault, subsequent encounter
- T44.0X3SPoisoning by anticholinesterase agents, assault, sequela
- T44.0X4APoisoning by anticholinesterase agents, undetermined, initial encounter
- T44.0X4DPoisoning by anticholinesterase agents, undetermined, subsequent encounter
- T44.0X4SPoisoning by anticholinesterase agents, undetermined, sequela
- T44.0X5AAdverse effect of anticholinesterase agents, initial encounter
- T44.0X5DAdverse effect of anticholinesterase agents, subsequent encounter
- T44.0X5SAdverse effect of anticholinesterase agents, sequela
- T44.0X6AUnderdosing of anticholinesterase agents, initial encounter
- T44.0X6DUnderdosing of anticholinesterase agents, subsequent encounter
- T44.0X6SUnderdosing of anticholinesterase agents, sequela
- T44.1X1APoisoning by other parasympathomimetics [cholinergics], accidental (unintentional), initial encounter
- T44.1X1DPoisoning by other parasympathomimetics [cholinergics], accidental (unintentional), subsequent encounter
- T44.1X1SPoisoning by other parasympathomimetics [cholinergics], accidental (unintentional), sequela
- T44.1X2APoisoning by other parasympathomimetics [cholinergics], intentional self-harm, initial encounter
- T44.1X2DPoisoning by other parasympathomimetics [cholinergics], intentional self-harm, subsequent encounter
- T44.1X2SPoisoning by other parasympathomimetics [cholinergics], intentional self-harm, sequela
- T44.1X3APoisoning by other parasympathomimetics [cholinergics], assault, initial encounter
- T44.1X3DPoisoning by other parasympathomimetics [cholinergics], assault, subsequent encounter
- T44.1X3SPoisoning by other parasympathomimetics [cholinergics], assault, sequela
- T44.1X4APoisoning by other parasympathomimetics [cholinergics], undetermined, initial encounter
- T44.1X4DPoisoning by other parasympathomimetics [cholinergics], undetermined, subsequent encounter
- T44.1X4SPoisoning by other parasympathomimetics [cholinergics], undetermined, sequela
- T44.1X5AAdverse effect of other parasympathomimetics [cholinergics], initial encounter
- T44.1X5DAdverse effect of other parasympathomimetics [cholinergics], subsequent encounter
- T44.1X5SAdverse effect of other parasympathomimetics [cholinergics], sequela
- T44.1X6AUnderdosing of other parasympathomimetics [cholinergics], initial encounter
- T44.1X6DUnderdosing of other parasympathomimetics [cholinergics], subsequent encounter
- T44.1X6SUnderdosing of other parasympathomimetics [cholinergics], sequela
- T44.2X1APoisoning by ganglionic blocking drugs, accidental (unintentional), initial encounter
- T44.2X1DPoisoning by ganglionic blocking drugs, accidental (unintentional), subsequent encounter
- T44.2X1SPoisoning by ganglionic blocking drugs, accidental (unintentional), sequela
- T44.2X2APoisoning by ganglionic blocking drugs, intentional self-harm, initial encounter
- T44.2X2DPoisoning by ganglionic blocking drugs, intentional self-harm, subsequent encounter
- T44.2X2SPoisoning by ganglionic blocking drugs, intentional self-harm, sequela
- T44.2X3APoisoning by ganglionic blocking drugs, assault, initial encounter
- T44.2X3DPoisoning by ganglionic blocking drugs, assault, subsequent encounter
- T44.2X3SPoisoning by ganglionic blocking drugs, assault, sequela
- T44.2X4APoisoning by ganglionic blocking drugs, undetermined, initial encounter
- T44.2X4DPoisoning by ganglionic blocking drugs, undetermined, subsequent encounter
- T44.2X4SPoisoning by ganglionic blocking drugs, undetermined, sequela
- T44.2X5AAdverse effect of ganglionic blocking drugs, initial encounter
- T44.2X5DAdverse effect of ganglionic blocking drugs, subsequent encounter
- T44.2X5SAdverse effect of ganglionic blocking drugs, sequela
- T44.2X6AUnderdosing of ganglionic blocking drugs, initial encounter
- T44.2X6DUnderdosing of ganglionic blocking drugs, subsequent encounter
- T44.2X6SUnderdosing of ganglionic blocking drugs, sequela
- T44.3X1APoisoning by other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics, accidental (unintentional), initial encounter
- T44.3X1DPoisoning by other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics, accidental (unintentional), subsequent encounter
- T44.3X1SPoisoning by other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics, accidental (unintentional), sequela
- T44.3X2APoisoning by other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics, intentional self-harm, initial encounter
- T44.3X2DPoisoning by other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics, intentional self-harm, subsequent encounter
- T44.3X2SPoisoning by other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics, intentional self-harm, sequela
T44 at a glance
| Code | T44 |
|---|---|
| Description | Poisoning by, adverse effect of and underdosing of drugs primarily affecting the autonomic nervous system |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together — inherited from T36-T50
The conditions below can never be reported together with T44 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- toxic reaction to local anesthesia in pregnancy (O29.3-)
Code first — inherited from T36-T50
The underlying condition below must be sequenced before T44. T44 describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 19
Report an additional code alongside T44 to fully describe the condition. T44 is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Use additional code — inherited from T36-T50
Report an additional code alongside T44 to fully describe the condition. T44 is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T44, but a patient may have both at the same time. When documentation supports it, T44 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T44, but a patient may have both at the same time. When documentation supports it, T44 and the excluded code may both be reported.
What codes fall under T44? (10)
- T44.0Poisoning by, adverse effect of and underdosing of anticholinesterase agentsnot billable
- T44.1Poisoning by, adverse effect of and underdosing of other parasympathomimetics [cholinergics]not billable
- T44.2Poisoning by, adverse effect of and underdosing of ganglionic blocking drugsnot billable
- T44.3Poisoning by, adverse effect of and underdosing of other parasympatholytics [anticholinergics and antimuscarinics] and spasmolyticsnot billable
- T44.4Poisoning by, adverse effect of and underdosing of predominantly alpha-adrenoreceptor agonistsnot billable
- T44.5Poisoning by, adverse effect of and underdosing of predominantly beta-adrenoreceptor agonistsnot billable
- T44.6Poisoning by, adverse effect of and underdosing of alpha-adrenoreceptor antagonistsnot billable
- T44.7Poisoning by, adverse effect of and underdosing of beta-adrenoreceptor antagonistsnot billable
- T44.8Poisoning by, adverse effect of and underdosing of centrally-acting and adrenergic-neuron- blocking agentsnot billable
- T44.9Poisoning by, adverse effect of and underdosing of other and unspecified drugs primarily affecting the autonomic nervous systemnot billable
How long has T44 existed?
T44 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.