Skip to content
Dx

ICD-10-CM 2027 diagnosis code

T56.3Toxic effects of cadmium and its compounds

Not billable — use a more specific codeRequires 7th character

T56.3 is a header code, so it can't be reported by itself. Choose one of the 1 more specific codes beneath it and add the required 7th character.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About T56.3

T56.3 is the ICD-10-CM diagnosis code for toxic effects of cadmium and its compounds. It belongs to category T56 (toxic effect of metals), block T51-T65 (toxic effects of substances chiefly nonmedicinal as to source) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 1 subcodes must be used instead.

Within T56 (toxic effect of metals), T56.3 is specifically for toxic effects of cadmium and its compounds. Related codes cover lead and its compounds (T56.0), mercury and its compounds (T56.1), chromium and its compounds (T56.2), 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-).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

7th character

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

  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Notes that apply from higher levels

Instructions written at a parent level also apply to T56.3.

› From T56 Toxic effect of metals
Includes
  • toxic effects of fumes and vapors of metals
  • toxic effects of metals from all sources, except medicinal substances
Excludes1
  • 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-)

Broader instructions also apply from T51-T65 Toxic effects of substances chiefly nonmedicinal as to source and Chapter 19: Injury, poisoning and certain other consequences of external causes.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about T56.3

Is T56.3 billable?

No. T56.3 is a header code. Report one of its more specific subcodes instead.