T44.0 — Poisoning by, adverse effect of and underdosing of anticholinesterase agents
Is T44.0 billable?
No — T44.0 is a non-billable header code. T44.0 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 18 billable codes beneath T44.0.
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
T44.0 at a glance
| Code | T44.0 |
|---|---|
| Description | Poisoning by, adverse effect of and underdosing of anticholinesterase agents |
| 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 T44.0 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 T44.0. T44.0 describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 19
Report an additional code alongside T44.0 to fully describe the condition. T44.0 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 T44.0 to fully describe the condition. T44.0 is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T44.0, but a patient may have both at the same time. When documentation supports it, T44.0 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T44.0, but a patient may have both at the same time. When documentation supports it, T44.0 and the excluded code may both be reported.
What codes fall under T44.0? (1)
How long has T44.0 existed?
T44.0 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.
What other codes are in the T44 family? (9)
- 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