T56

ICD-10Non-billable category

Toxic effect of metals

Official ICD-10-CM descriptor (FY2026)

Toxic effect of metals

T56 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.

Includes

toxic effects of fumes and vapors of metals
toxic effects of metals from all sources, except medicinal substances

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

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

Use additional code

Report an additional code to identify the associated condition.

code to identify any retained metal foreign body, if applicable (Z18.0-, T18.1-)

7th character

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

Permitted 7th characters

A	initial encounter
D	subsequent encounter
S	sequela

More specific codes under T56

Where this code sits

Chapter: 19. Injury, poisoning and certain other consequences of external causes (S00-T88)
Block: Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.