Is ICD-10-CM code T59.822D billable?

Yes, T59.822D (Toxic effect of hexamethylene diisocyanate, intentional self-harm, subsequent encounter) is a billable ICD-10-CM diagnosis code, valid for reimbursement on HIPAA-covered transactions for FY2027.

Is T59.822D exempt from POA reporting?

Yes, T59.822D is on the CMS list of ICD-10-CM codes exempt from Present On Admission (POA) reporting for FY2027. Inpatient claims do not require a POA indicator for this code.

What chapter does ICD-10-CM code T59.822D belong to?

T59.822D belongs to Chapter 19 of the ICD-10-CM tabular list: S00–T88 (Injury, Poisoning and Certain Other Consequences of External Causes).

Is T59.822D a new ICD-10-CM code for 2027?

Yes, T59.822D was added or revised in the FY2027 ICD-10-CM update, effective October 1, 2026, as published by the Centers for Medicare and Medicaid Services (CMS).

T59.822DBillable, valid for claims from October 1, 2026New for FY2027

Toxic effect of hexamethylene diisocyanate, intentional self-harm, subsequent encounter

Under T59.822 Toxic effect of hexamethylene diisocyanate, intentional self-harm, in Toxic effects of substances chiefly nonmedicinal as to source (T51-T65), chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes

T59.822D is billable and valid on claims for FY 2027. If the record has more detail, check the other codes under T59.822 below.
As a secondary diagnosis it is not a CC or MCC, so it doesn't raise the MS-DRG payment.
Exempt from present-on-admission (POA) reporting. (POA Exempt list)

Instructional notes

Also applies, from T59: Toxic effect of other gases, fumes and vapors

These notes sit on T59 and apply to every code under it, including T59.822D.

Includes: conditions that are coded here

aerosol propellants

Excludes1: not coded here, use a different code

chlorofluorocarbons (T53.5)

Also applies, from Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)

These notes sit on T51-T65 and apply to every code under it, including T59.822D.

Excludes1: not coded here, use a different code

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

Use additional code: add a second code for this, listed after this one

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.-)

Other codes under T59.822

Toxic effect of hexamethylene diisocyanate, intentional self-harm

T59.822AToxic effect of hexamethylene diisocyanate, intentional self-harm, initial encounter
T59.822DToxic effect of hexamethylene diisocyanate, intentional self-harm, subsequent encounter(this code)
T59.822SToxic effect of hexamethylene diisocyanate, intentional self-harm, sequela

MS-DRGs

As the principal diagnosis, this code groups to these MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Poisoning

A poison is any substance that is harmful to your body. You might swallow it, inhale it, inject it, or absorb it through your skin. Any substance can be poisonous if too much is taken. Poisons can include:

Code history

Added in FY2027 (effective October 1, 2026). Before that, these cases were coded as T59.892D (Toxic effect of other specified gases, fumes and vapors, intentional self-harm, subsequent encounter). No changes since.