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ICD-10-CM · FY 2026 APRIL UPDATE

T56

Toxic effect of metals

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
T56.0Toxic effects of lead and its compoundsCategory
T56.0XToxic effects of lead and its compoundsCategory
T56.0X1Toxic effect of lead and its compounds, accidental (unintentional)Category
T56.0X1AToxic effect of lead and its compounds, accidental (unintentional), initial encounterBillable
T56.0X1DToxic effect of lead and its compounds, accidental (unintentional), subsequent encounterBillable
T56.0X1SToxic effect of lead and its compounds, accidental (unintentional), sequelaBillable
T56.0X2Toxic effect of lead and its compounds, intentional self-harmCategory
T56.0X2AToxic effect of lead and its compounds, intentional self-harm, initial encounterBillable
T56.0X2DToxic effect of lead and its compounds, intentional self-harm, subsequent encounterBillable
T56.0X2SToxic effect of lead and its compounds, intentional self-harm, sequelaBillable
T56.0X3Toxic effect of lead and its compounds, assaultCategory
T56.0X3AToxic effect of lead and its compounds, assault, initial encounterBillable
T56.0X3DToxic effect of lead and its compounds, assault, subsequent encounterBillable
T56.0X3SToxic effect of lead and its compounds, assault, sequelaBillable
T56.0X4Toxic effect of lead and its compounds, undeterminedCategory
T56.0X4AToxic effect of lead and its compounds, undetermined, initial encounterBillable
T56.0X4DToxic effect of lead and its compounds, undetermined, subsequent encounterBillable
T56.0X4SToxic effect of lead and its compounds, undetermined, sequelaBillable
T56.1Toxic effects of mercury and its compoundsCategory
T56.1XToxic effects of mercury and its compoundsCategory
T56.1X1Toxic effect of mercury and its compounds, accidental (unintentional)Category
T56.1X1AToxic effect of mercury and its compounds, accidental (unintentional), initial encounterBillable
T56.1X1DToxic effect of mercury and its compounds, accidental (unintentional), subsequent encounterBillable
T56.1X1SToxic effect of mercury and its compounds, accidental (unintentional), sequelaBillable
T56.1X2Toxic effect of mercury and its compounds, intentional self-harmCategory
T56.1X2AToxic effect of mercury and its compounds, intentional self-harm, initial encounterBillable
T56.1X2DToxic effect of mercury and its compounds, intentional self-harm, subsequent encounterBillable
T56.1X2SToxic effect of mercury and its compounds, intentional self-harm, sequelaBillable
T56.1X3Toxic effect of mercury and its compounds, assaultCategory
T56.1X3AToxic effect of mercury and its compounds, assault, initial encounterBillable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.