Is ICD-10-CM code T52.811S billable?

Yes, T52.811S (Toxic effect of alkenes, accidental (unintentional), sequela) is a billable ICD-10-CM diagnosis code, valid for reimbursement on HIPAA-covered transactions for FY2027.

Is T52.811S exempt from POA reporting?

Yes, T52.811S 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 T52.811S belong to?

T52.811S belongs to Chapter 19 of the ICD-10-CM tabular list: S00–T88 (Injury, Poisoning and Certain Other Consequences of External Causes).

Is T52.811S a new ICD-10-CM code for 2027?

Yes, T52.811S 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).

T52.811SBillable, valid for claims from October 1, 2026New for FY2027

Toxic effect of alkenes, accidental (unintentional), sequela

Under T52.811 Toxic effect of alkenes, accidental (unintentional), in Toxic effects of substances chiefly nonmedicinal as to source (T51-T65), chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes

T52.811S is billable and valid on claims for FY 2027. If the record has more detail, check the other codes under T52.811 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 T52.811: Toxic effect of alkenes, accidental (unintentional)

These notes sit on T52.811 and apply to every code under it, including T52.811S.

Includes: conditions that are coded here

Toxic effects of alkenes NOS

Also applies, from T52: Toxic effect of organic solvents

These notes sit on T52 and apply to every code under it, including T52.811S.

Excludes1: not coded here, use a different code

halogen derivatives of aliphatic and aromatic hydrocarbons (T53.-)

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 T52.811S.

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 T52.811

Toxic effect of alkenes, accidental (unintentional)

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(this code)

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.

Code history

Added in FY2027 (effective October 1, 2026). Before that, these cases were coded as T52.8X1S. No changes since.