T44.901A — Poisoning by unspecified drugs primarily affecting the autonomic nervous system, accidental (unintentional), initial encounter
Is T44.901A billable?
Yes, but T44.901A is an unspecified code. T44.901A is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, T44.901A is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting T44.901A — the more specific alternatives are listed below.
More specific alternatives
- T44.0X1APoisoning by anticholinesterase agents, accidental (unintentional), initial encounter
- T44.1X1APoisoning by other parasympathomimetics [cholinergics], accidental (unintentional), initial encounter
- T44.2X1APoisoning by ganglionic blocking drugs, accidental (unintentional), initial encounter
- T44.3X1APoisoning by other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics, accidental (unintentional), initial encounter
- T44.4X1APoisoning by predominantly alpha-adrenoreceptor agonists, accidental (unintentional), initial encounter
- T44.5X1APoisoning by predominantly beta-adrenoreceptor agonists, accidental (unintentional), initial encounter
- T44.6X1APoisoning by alpha-adrenoreceptor antagonists, accidental (unintentional), initial encounter
- T44.7X1APoisoning by beta-adrenoreceptor antagonists, accidental (unintentional), initial encounter
- T44.8X1APoisoning by centrally-acting and adrenergic-neuron-blocking agents, accidental (unintentional), initial encounter
T44.901A at a glance
| Code | T44.901A |
|---|---|
| Description | Poisoning by unspecified drugs primarily affecting the autonomic nervous system, accidental (unintentional), initial encounter |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "A" | initial encounter |
What does the 7th character "A" mean in T44.901A?
In T44.901A, the 7th character A means initial encounter. The 7th character is required for T44.901A to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T44.901A group to?
T44.901A sits in MDC 21 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 917Poisoning and Toxic Effects of Drugs with MCCmedical
- 918Poisoning and Toxic Effects of Drugs without MCCmedical
Inclusion terms
Alternative wording in documentation that is classified to T44.901A.
- Poisoning by unspecified drugs primarily affecting the autonomic nervous system NOS
Excludes1 — never code together — inherited from T36-T50
The conditions below can never be reported together with T44.901A 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 T44.901A. T44.901A describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 19
Report an additional code alongside T44.901A to fully describe the condition. T44.901A 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 T44.901A to fully describe the condition. T44.901A is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T44.901A, but a patient may have both at the same time. When documentation supports it, T44.901A and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T44.901A, but a patient may have both at the same time. When documentation supports it, T44.901A and the excluded code may both be reported.
How long has T44.901A existed?
T44.901A 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.