T44.991 - Poisoning by other drug primarily affecting the autonomic nervous system, accidental (unintentional)
ICD-10-CM Chapter 19: Injury, poisoning and certain other consequences of external causes · T36-T50 Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50) · Subcategory of T44.99 · FY2027
Coding Guidance
T44.991 requires a 7th character. Report the code below that matches the documentation, for example A for initial encounter, D for subsequent encounter, S for sequela.
Inclusion terms listed under T44.991 in the ICD-10-CM tabular list.
- Poisoning by other drugs primarily affecting the autonomic nervous system NOS
The appropriate 7th character is to be added to each code from category T44
Includes, Excludes and Coding Notes
Conditions this code covers.
- adverse effect of correct substance properly administered
- poisoning by overdose of substance
- poisoning by wrong substance given or taken in error
- underdosing by (inadvertently) (deliberately) taking less substance than prescribed or instructed
Mutually exclusive: these conditions are never reported together with this code.
- toxic reaction to local anesthesia in pregnancy (O29.3-)
Not part of this code; report both codes when the patient has both conditions.
- abuse and dependence of psychoactive substances (F10-F19)
- abuse of non-dependence-producing substances (F55.-)
- immunodeficiency due to drugs (D84.821)
- drug reaction and poisoning affecting newborn (P00-P96)
- pathological drug intoxication (inebriation) (F10-F19)
Add a secondary code to identify the associated condition or cause when it is documented.
- code(s) to specify:
- manifestations of poisoning
- underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9)
- underdosing of medication regimen (Z91.12-, Z91.13-)
Sequence the underlying condition before this code.
- , for adverse effects, the nature of the adverse effect, such as:
- adverse effect NOS (T88.7)
- aspirin gastritis (K29.-)
- blood disorders (D56-D76)
- contact dermatitis (L23-L25)
- dermatitis due to substances taken internally (L27.-)
- nephropathy (N14.0-N14.2)
Instructional notes from the ICD-10-CM tabular list.
- The drug giving rise to the adverse effect should be identified by use of codes from categories T36-T50 with fifth or sixth character 5.
Not part of this code; report both codes when the patient has both conditions.
- birth trauma (P10-P15)
- obstetric trauma (O70-O71)
Add a secondary code to identify the associated condition or cause when it is documented.
- code to identify any retained foreign body, if applicable (Z18.-)
Instructional notes from the ICD-10-CM tabular list.
- Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
- The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.
More Specific Codes (3)
More specific codes for T44.991
Codes at the same level as T44.991
- Poisoning by other drug primarily affecting the autonomic nervous system, intentional self-harmT44.992
- Poisoning by other drug primarily affecting the autonomic nervous system, assaultT44.993
- Poisoning by other drug primarily affecting the autonomic nervous system, undeterminedT44.994
- Adverse effect of other drug primarily affecting the autonomic nervous systemT44.995
- Underdosing of other drug primarily affecting the autonomic nervous systemT44.996