T56.1

T56.1: Toxic effects of mercury and its compounds

Non-billable headerICD-10-CM

T56.1 is a non-billable header ICD-10-CM code for toxic effects of mercury and its compounds. 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

Excludes1 inherited from the categories above T56.1

A category’s note binds every code beneath it.

Written on T56: Toxic effect of metals

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

Other codes that can never be billed with T56.1

Their own Excludes1 notes name this code, so the conflict is not listed above.

T61Toxic effect of noxious substances eaten as seafood
T62Toxic effect of other noxious substances eaten as food

Risk adjustment

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

Alphabetic index entries that lead here

Minamata disease

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead T56.1

1 child code. Green means billable.

T56.1XToxic effects of mercury and its compounds