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T56.824S ICD-10-CM Code: Toxic effect of gadolinium, undetermined, sequela

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FY 2026 Apr update / Injury, poisoning and certain other consequences of external causes (S00-T88) / Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)

T56.824S

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Toxic effect of gadolinium, undetermined, sequela

Toxic effect of gadolinium, undetermined, sequela

CMS-HCC V28

0

0

RAF 0

CMS-HCC V24

0

0

RAF 0

ACA/HHS

0

0

RAF 0

ESRD/PACE

0

0

RAF 0

RXHCC

0

0

RAF 0

Code Trumping

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Code Book Path

Official
T56.82Toxic effect of gadolinium
T56.824Toxic effect of gadolinium, undetermined
T56.824SToxic effect of gadolinium, undetermined, sequela

Inclusion Terms

Official

ICD-10-CM does not list inclusion terms for T56.824S in this effective period.

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for T56.824S in this effective period.

Related Child Codes

Official
T56.824AToxic effect of gadolinium, undetermined, initial encounter
T56.824DToxic effect of gadolinium, undetermined, subsequent encounter

Includes

Official

ICD-10-CM does not list Includes notes for T56.824S in this effective period.

Excludes 1

Official

ICD-10-CM does not list Excludes 1 notes for T56.824S in this effective period.

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for T56.824S in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for T56.824S in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for T56.824S in this effective period.

Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.

Is T56.824S an HCC code?

No. T56.824S is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

T56.824S is the ICD-10-CM diagnosis code for toxic effect of gadolinium, undetermined, sequela. T56.824S sits in the ICD-10-CM chapter for injury, poisoning and certain other consequences of external causes (s00-t88), within the section covering toxic effects of substances chiefly nonmedicinal as to source (t51-t65).

T56.824S is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.

T56.824S is a billable ICD-10-CM code that can be reported on claims but does not currently contribute to a Medicare Advantage member's RAF score under any CMS risk adjustment model (V28, V24, ESRD, or RxHCC). Coders reviewing T56.824S should check whether additional documentation would support a more specific child code in the same hierarchy that does map to a payment HCC, capturing the correct specificity is the highest-impact RAF improvement available within accurate coding.

HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for T56.824S sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Child Codes

Code Hierarchy

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