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T52.811Non-billableSave New in FY2027

T52.811 - Toxic effect of alkenes, accidental (unintentional)

ICD-10-CM Chapter 19: Injury, poisoning and certain other consequences of external causes · T51-T65 Toxic effects of substances chiefly nonmedicinal as to source (T51-T65) · Subcategory of T52.81 · FY2027

Coding Guidance

T52.811 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.

Applicable To

Inclusion terms listed under T52.811 in the ICD-10-CM tabular list.

  • Toxic effects of alkenes NOS
7th Character

The appropriate 7th character is to be added to each code from category T52

Includes, Excludes and Coding Notes

Excludes 1 — Not Coded HereFrom T52

Mutually exclusive: these conditions are never reported together with this code.

  • halogen derivatives of aliphatic and aromatic hydrocarbons (T53.-)
Excludes 1 — Not Coded HereFrom T51-T65 Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)

Mutually exclusive: these conditions are never reported together with this code.

  • contact with and (suspected) exposure to toxic substances (Z77.-)
Use Additional CodeFrom T51-T65 Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)

Add a secondary code to identify the associated condition or cause when it is documented.

  • code(s):
  • for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)
  • personal history of foreign body fully removed (Z87.821)
  • to identify any retained foreign body, if applicable (Z18.-)
NotesFrom T51-T65 Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)

Instructional notes from the ICD-10-CM tabular list.

  • When no intent is indicated code to accidental. Undetermined intent is only for use when there is specific documentation in the record that the intent of the toxic effect cannot be determined.
Excludes 2 — Not Included HereFrom Chapter S00-T88

Not part of this code; report both codes when the patient has both conditions.

  • birth trauma (P10-P15)
  • obstetric trauma (O70-O71)
Use Additional CodeFrom Chapter S00-T88

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.-)
NotesFrom Chapter S00-T88

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)

T52.811AToxic effect of alkenes, accidental (unintentional), initial encounter→T52.811DToxic effect of alkenes, accidental (unintentional), subsequent encounter→T52.811SToxic effect of alkenes, accidental (unintentional), sequela→