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ICD-10-CM 2027

ICD-10 code for Minamata disease

T56.1

Toxic effects of mercury and its compounds

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Minamata disease”. Page updated September 29, 2026.

About coding Minamata disease

The ICD-10-CM code for Minamata disease is T56.1 (Toxic effects of mercury and its compounds).

Within T56 (toxic effect of metals), T56.1 is specifically for toxic effects of mercury and its compounds. Related codes cover lead and its compounds (T56.0), chromium and its compounds (T56.2), cadmium and its compounds (T56.3), copper and its compounds (T56.4), zinc and its compounds (T56.5), tin and its compounds (T56.6), beryllium and its compounds (T56.7), other metals (T56.8) and 1 more.

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

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

Common questions about Minamata disease ICD-10 codes

What is the ICD-10 code for Minamata disease?

T56.1 — Toxic effects of mercury and its compounds (a header code; report a more specific subcode).

Is T56.1 billable?

No. T56.1 is a header code. Report one of its more specific subcodes instead.