2027 ICD-10-CM Diagnosis Code T52.81Toxic effects of alkenes

ICD-10-CM Codes›S00–T88›T51-T65›T52

ICD-10-CM T52.81
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

T52.81 is a non-billable ICD-10-CM category code for toxic effects of alkenes, so it cannot be submitted on claims. Use a more specific code from this category instead, such as T52.811A, T52.811D, T52.811S, and T52.812A.

Code Identity

ICD-10-CM Code
T52.81
Billable Status
No — Non-Billable Category
Code Describes
Toxic effects of alkenes
Short Description
Toxic effects of alkenes
Same as the full description in the CMS dataset.
Parent Code
T52.8
Toxic effects of other organic solvents

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionT51-T65Toxic effects of substances chiefly nonmedicinal as to source
CategoryT52Toxic effect of organic solvents
This CodeT52.81Toxic effects of alkenes

Specific Coding for Toxic effects of alkenesOverview

Non-specific codes like T52.81 require more characters. Use one of these billable codes instead:

Coding GuidelinesGuidance

When a harmful substance is ingested or comes in contact with a person, this is classified as a toxic effect. Toxic effect codes have an associated intent: accidental, intentional self-harm, assault and undetermined.

The appropriate 7th character is to be added to each code from block Toxic effect of organic solvents (T52). Use the following options for the applicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, published by CMS and the National Center for Health Statistics.

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to T52.81: its own notes plus those printed at T52, block T51-T65, and Chapter 19. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From T52 Toxic effect of organic solvents applies to 108 codes
  • halogen derivatives of aliphatic and aromatic hydrocarbons (T53.-)
From Block T51-T65 Toxic effects of substances chiefly nonmedicinal as to source applies to 1,680 codes
  • contact with and (suspected) exposure to toxic substances (Z77.-)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Block T51-T65 Toxic effects of substances chiefly nonmedicinal as to source applies to 1,680 codes
  • 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.-)
From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • code to identify any retained foreign body, if applicable (Z18.-)

Notes

General instructions on how these codes are used.

From Block T51-T65 Toxic effects of substances chiefly nonmedicinal as to source applies to 1,680 codes
  • 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.
From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • 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.

7th Character

Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.

From T52 Toxic effect of organic solvents applies to 108 codes
  • The appropriate 7th character is to be added to each code from category T52
Values for category T52 Encounter: Initial, Subsequent, Sequela
  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Code HistoryHistory

FY 2027AddedAdded to the ICD-10-CM code setEffective October 1, 2026.
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About T52.81Overview

What is the ICD-10 code for toxic effects of alkenes?

T52.81 (sometimes written as T5281) is the ICD-10-CM category for toxic effects of alkenes, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is T52.81 (Toxic effects of other organic solvents) a billable code?

No. This is a category header that groups the codes for toxic effects of alkenes, and headers cannot be submitted on claims. Claims for toxic effects of alkenes need a more specific code from this category, such as T52.811A, T52.811D, and T52.811S.

Can T52.81 be reported with a code from T53?

Not as a rule. The Excludes1 note at T52, which applies to T52.81, lists "halogen derivatives of aliphatic and aromatic hydrocarbons (T53.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).