T44.991A ICD-10-CM Code: Poisoning by other drug primarily affecting the autonomic nervous system, accidental (unintentional), initial encounter
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Code definition
Official description
T44.991APoisoning by other drug primarily affecting the autonomic nervous system, accidental (unintentional), initial encounter
ICD-10-CM diagnosis code · United States clinical modification
Classification
Where T44.991A sits
- 1
Chapter 19
Injury, poisoning and certain other consequences of external causes (S00-T88)
- 2
Section
Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50)
- 3
Category T44
Poisoning by, adverse effect of and underdosing of drugs primarily affecting the autonomic nervous system
- 4
Subcategory T44.991
Poisoning by other drug primarily affecting the autonomic nervous system, accidental (unintentional)
- 5
Code T44.991A
Poisoning by other drug primarily affecting the autonomic nervous system, accidental (unintentional), initial encounter
Documentation details
Notes for this code
Inclusion terms
No inclusion terms are listed for T44.991A.
Code first
No “code first” instruction is listed for T44.991A.
Use additional code
No “use additional code” instruction is listed for T44.991A.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for T44.991A.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for T44.991A.
Transparency
Source and release
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Review the CDC/NCHS ICD-10-CM sourceCode-specific guidance
Frequently asked questions
What does ICD-10-CM code T44.991A mean?
T44.991A is the FY 2027 U.S. ICD-10-CM code for “Poisoning by other drug primarily affecting the autonomic nervous system, accidental (unintentional), initial encounter.”
Is T44.991A a billable or specific ICD-10-CM code?
Yes. In the FY 2027 reference data used on this page, T44.991A has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.
Where is T44.991A located in ICD-10-CM?
T44.991A is listed in Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88), within Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50) (T36–T50), under category T44, Poisoning by, adverse effect of and underdosing of drugs primarily affecting the autonomic nervous system and subcategory T44.991, Poisoning by other drug primarily affecting the autonomic nervous system, accidental (unintentional).
What coding notes are listed for T44.991A?
No inclusion terms are listed for T44.991A in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.
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