ICD-10 Diagnosis Code T56.1X4

Toxic effect of mercury and its compounds, undetermined

Diagnosis Code T56.1X4

ICD-10: T56.1X4
Short Description: Toxic effect of mercury and its compounds, undetermined
Long Description: Toxic effect of mercury and its compounds, undetermined
This is the 2017 version of the ICD-10-CM diagnosis code T56.1X4

Not Valid for Submission
The code T56.1X4 is a "header" and not valid for submission for HIPAA-covered transactions.

Code Classification
  • Injury, poisoning and certain other consequences of external causes (S00–T98)
    • Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)
      • Toxic effect of metals (T56)

Information for Patients


Mercury is an element that is found in air, water and soil. It has several forms. Metallic mercury is a shiny, silver-white, odorless liquid. If heated, it is a colorless, odorless gas. It also combines with other elements to form powders or crystals. Mercury is in many products. Metallic mercury is used in glass thermometers, silver dental fillings, and button batteries. Mercury salts may be used in skin creams and ointments. It's also used in many industries.

Mercury in the air settles into water. It can pass through the food chain and build up in fish, shellfish, and animals that eat fish. The nervous system is sensitive to all forms of mercury. Exposure to high levels can damage the brain and kidneys. Pregnant women can pass the mercury in their bodies to their babies.

It is important to protect your family from mercury exposure:

  • Carefully handle and dispose of products that contain mercury
  • Limit your consumption of fish with higher levels of mercury

Agency for Toxic Substances and Disease Registry

  • Mercuric chloride poisoning
  • Mercuric oxide poisoning
  • Mercury
  • Mercury Quick Facts: Health Effects of Mercury Exposure (Agency for Toxic Substances and Disease Registry)
  • Methylmercury poisoning

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