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T56.821

T56.821: Toxic effect of gadolinium, accidental (unintentional)

Non-billable headerICD-10-CM

T56.821 is a non-billable header ICD-10-CM code for toxic effect of gadolinium, accidental (unintentional). It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.

This code requires a 7th character

The appropriate 7th character is to be added to each code from category T56

A
initial encounter
D
subsequent encounter
S
sequela

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Toxic effect of gadolinium NOS

Excludes1 inherited from the categories above T56.821

A category’s note binds every code beneath it.

Written on T56.82: Toxic effect of gadolinium

  • adverse effect of diagnostic agents (T50.8X5-)

Written on T56: Toxic effect of metals

  • arsenic and its compounds (T57.0)
  • manganese and its compounds (T57.2)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead T56.821

3 child codes. Green means billable.

Other codes under T56.82

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.