ICD-10-CM › S00-T88 › T51-T65 › T59.821 Toxic effect of hexamethylene... › T59.821S

Valid for claims with a date of service in the current code year.

Valid FY2027 onwards.

What has happened to this code

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

Inherited from T59 Toxic effect of other gases, fumes and vapors

Seventh character required

• The appropriate 7th character is to be added to each code from category T59

Excludes1 - never coded here

• chlorofluorocarbons (T53.5)

Includes

• aerosol propellants

Inherited from the T51-T65 section Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)

Excludes1 - never coded here

• contact with and (suspected) exposure to toxic substances (Z77.-)

Use additional code

• 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.-)

Note

• 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.

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.

• Hexamethylene > diisocyanate

Codes in the same group

Code	Description	Status
T59.821A	Toxic effect of hexamethylene diisocyanate, accidental (unintentional), initial encounter	Valid
T59.821D	Toxic effect of hexamethylene diisocyanate, accidental (unintentional), subsequent encounter	Valid