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  6. 2024 ICD-10-CM Code T56.1X
Version 2024
Non-Billable Code

2024 ICD-10-CM Diagnosis Code T56.1X

Toxic effects of mercury and its compounds

ICD-10-CM Code:
T56.1X
ICD-10 Code for:
Toxic effects of mercury and its compounds
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • Injury, poisoning and certain other consequences of external causes
    (S00–T88)
    • Toxic effects of substances chiefly nonmedicinal as to source
      (T51-T65)
      • Toxic effect of metals
        (T56)

T56.1X is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of toxic effects of mercury and its compounds. The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Toxic effects of mercury and its compounds

Non-specific codes like T56.1X require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for toxic effects of mercury and its compounds:

  • T56.1X1 for Toxic effect of mercury and its compounds, accidental (unintentional) - NON-BILLABLE CODE

  • Use T56.1X1A for initial encounter - BILLABLE CODE

  • Use T56.1X1D for subsequent encounter - BILLABLE CODE

  • Use T56.1X1S for sequela - BILLABLE CODE

  • T56.1X2 for Toxic effect of mercury and its compounds, intentional self-harm - NON-BILLABLE CODE

  • Use T56.1X2A for initial encounter - BILLABLE CODE

  • Use T56.1X2D for subsequent encounter - BILLABLE CODE

  • Use T56.1X2S for sequela - BILLABLE CODE

  • T56.1X3 for Toxic effect of mercury and its compounds, assault - NON-BILLABLE CODE

  • Use T56.1X3A for initial encounter - BILLABLE CODE

  • Use T56.1X3D for subsequent encounter - BILLABLE CODE

  • Use T56.1X3S for sequela - BILLABLE CODE

  • T56.1X4 for Toxic effect of mercury and its compounds, undetermined - NON-BILLABLE CODE

  • Use T56.1X4A for initial encounter - BILLABLE CODE

  • Use T56.1X4D for subsequent encounter - BILLABLE CODE

  • Use T56.1X4S for sequela - BILLABLE CODE

Coding Guidelines

When a harmful substance is ingested or comes in contact with a person, this is classified as a toxic effect. Toxic effect codes have an associated intent: accidental, intentional self-harm, assault and undetermined.

The appropriate 7th character is to be added to each code from block Toxic effect of metals (T56). Use the following options for the aplicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Patient Education


Mercury

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


[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.