Is ICD-10-CM code T52.824S billable?

Yes, T52.824S (Toxic effect of cycloparaffins, undetermined, sequela) is a billable ICD-10-CM diagnosis code, valid for reimbursement on HIPAA-covered transactions for FY2027.

Is T52.824S exempt from POA reporting?

Yes, T52.824S 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 T52.824S belong to?

T52.824S belongs to Chapter 19 of the ICD-10-CM tabular list: S00–T88 (Injury, Poisoning and Certain Other Consequences of External Causes).

Is T52.824S a new ICD-10-CM code for 2027?

Yes, T52.824S 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).

T52.824SBillable, valid for claims from October 1, 2026New for FY2027

Toxic effect of cycloparaffins, undetermined, sequela

Under T52.824 Toxic effect of cycloparaffins, undetermined, in Toxic effects of substances chiefly nonmedicinal as to source (T51-T65), chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes

T52.824S is billable and valid on claims for FY 2027. If the record has more detail, check the other codes under T52.824 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 T52.82: Toxic effects of cycloparaffins

These notes sit on T52.82 and apply to every code under it, including T52.824S.

Includes: conditions that are coded here

Toxic effects of naphthenes
Toxic effects of cycloalkanes

Also applies, from T52: Toxic effect of organic solvents

These notes sit on T52 and apply to every code under it, including T52.824S.

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 T52.824S.

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 T52.824

Toxic effect of cycloparaffins, undetermined

T52.824AToxic effect of cycloparaffins, undetermined, initial encounter
T52.824DToxic effect of cycloparaffins, undetermined, subsequent encounter
T52.824SToxic effect of cycloparaffins, undetermined, 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 T52.8X4S. No changes since.