2027 ICD-10-CM Diagnosis Code T59.82Toxic effects of hexamethylene diisocyanate

ICD-10-CM Codes›S00–T88›T51-T65›T59

ICD-10-CM T59.82
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

T59.82 is a non-billable ICD-10-CM category code for toxic effects of hexamethylene diisocyanate, so it cannot be submitted on claims. Use a more specific code from this category instead, such as T59.821A, T59.821D, T59.821S, and T59.822A.

Code Identity

ICD-10-CM Code
T59.82
Billable Status
No — Non-Billable Category
Code Describes
Toxic effects of hexamethylene diisocyanate
Short Description
Toxic effects of hexamethylene diisocyanate
Same as the full description in the CMS dataset.
Parent Code
T59.8
Toxic effect of other specified gases, fumes and vapors

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionT51-T65Toxic effects of substances chiefly nonmedicinal as to source
CategoryT59Toxic effect of other gases, fumes and vapors
This CodeT59.82Toxic effects of hexamethylene diisocyanate

Specific Coding for Toxic effects of hexamethylene diisocyanateOverview

Non-specific codes like T59.82 require more characters. Use one of these billable codes instead:

  • T59.821 for Toxic effect of hexamethylene diisocyanate, accidental (unintentional)

  • Use T59.821A for initial encounter

  • Use T59.821D for subsequent encounter

  • Use T59.821S for sequela

  • T59.822 for Toxic effect of hexamethylene diisocyanate, intentional self-harm

  • Use T59.822A for initial encounter

  • Use T59.822D for subsequent encounter

  • Use T59.822S for sequela

  • T59.823 for Toxic effect of hexamethylene diisocyanate, assault

  • Use T59.823A for initial encounter

  • Use T59.823D for subsequent encounter

  • Use T59.823S for sequela

  • T59.824 for Toxic effect of hexamethylene diisocyanate, undetermined

  • Use T59.824A for initial encounter

  • Use T59.824D for subsequent encounter

  • Use T59.824S for sequela

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 other gases, fumes and vapors (T59). 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 T59.82: its own notes plus those printed at T59, block T51-T65, and Chapter 19. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From T59 Toxic effect of other gases, fumes and vapors applies to 144 codes
  • aerosol propellants

Excludes1

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

From T59 Toxic effect of other gases, fumes and vapors applies to 144 codes
  • chlorofluorocarbons (T53.5)
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 T59 Toxic effect of other gases, fumes and vapors applies to 144 codes
  • The appropriate 7th character is to be added to each code from category T59
Values for category T59 Encounter: Initial, Subsequent, Sequela
  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

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

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name T59.82, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming T59.82: they are not reported together with it, unless the two conditions are unrelated.

  • T71 Asphyxiation
    asphyxia from other gases, fumes and vapors (T59.-) names T59.-, which includes this code

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 T59.82Overview

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

T59.82 (sometimes written as T5982) is the ICD-10-CM category for toxic effects of hexamethylene diisocyanate, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is T59.82 (Toxic effect of other specified gases, fumes and vapors) a billable code?

No. This is a category header that groups the codes for toxic effects of hexamethylene diisocyanate, and headers cannot be submitted on claims. Claims for toxic effects of hexamethylene diisocyanate need a more specific code from this category, such as T59.821A, T59.821D, and T59.821S.

Can T59.82 be reported with T53.5?

Not as a rule. The Excludes1 note at T59, which applies to T59.82, lists "chlorofluorocarbons (T53.5)". 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).