ICDwise
T56 ⚠ Non-billable

Toxic effect of metals

ICD-10-CM · FY2026 · Injury, Poisoning and Certain Other Consequences of External Causes

Code
T56
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Injury, Poisoning and Certain Other Consequences of External Causes
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Official coding notes

From CMS's ICD-10-CM Tabular List.

Includes
  • toxic effects of fumes and vapors of metals
  • toxic effects of metals from all sources, except medicinal substances
Excludes1 — never code together
  • arsenic and its compounds (T57.0)
  • manganese and its compounds (T57.2)
Use additional code
  • 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

Frequently asked questions

What is ICD-10 code T56?
ICD-10-CM code T56 represents Toxic effect of metals. It is a non-billable header code requiring a more specific subcategory in the Injury, Poisoning and Certain Other Consequences of External Causes chapter, effective October 1, 2025 – September 30, 2026.
Is T56 billable?
No. T56 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is T56 in?
T56 belongs to the Injury, Poisoning and Certain Other Consequences of External Causes chapter (S00–T88) of ICD-10-CM.

Related codes in the T56 category

T56.0 Toxic effects of lead and its compounds Non-billable T56.1 Toxic effects of mercury and its compounds Non-billable T56.2 Toxic effects of chromium and its compounds Non-billable T56.0X Toxic effects of lead and its compounds Non-billable T56.1X Toxic effects of mercury and its compounds Non-billable T56.2X Toxic effects of chromium and its compounds Non-billable T56.0X1 Toxic effect of lead and its compounds, accidental (unintentional) Non-billable T56.0X2 Toxic effect of lead and its compounds, intentional self-harm Non-billable

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