DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

T56 Toxic effect of metals

  • Header · not billable
  • Codes take a 7th character

T56 is not billable. The category heads 144 billable codes in FY2027, grouped under 10 subdivisions. Its codes take a 7th character, so none is complete with fewer than 7 characters.

Index → code

Where it sits

  1. Chapter 19 Injury, poisoning and certain other consequences of external causes (S00-T88)
  2. T51-T65 Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)
  3. T56 Toxic effect of metals
Billable codes
144
Subdivisions
10
CC / MCC codes
0 / 0
HCC V28 codes
12
New FY2027
0
Index entries
14

Codes in T56

  1. T56.0
    Toxic effects of lead and its compounds
    Header
  2. T56.0X
    Toxic effects of lead and its compounds
    Header
  3. T56.0X1
    Toxic effect of lead and its compounds, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Toxic effects of lead and its compounds NOS
  4. T56.0X2
    Toxic effect of lead and its compounds, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  5. T56.0X3
    Toxic effect of lead and its compounds, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  6. T56.0X4
    Toxic effect of lead and its compounds, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  7. T56.1
    Toxic effects of mercury and its compounds
    Header
  8. T56.1X
    Toxic effects of mercury and its compounds
    Header
  9. T56.1X1
    Toxic effect of mercury and its compounds, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Toxic effects of mercury and its compounds NOS
  10. T56.1X2
    Toxic effect of mercury and its compounds, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  11. T56.1X3
    Toxic effect of mercury and its compounds, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  12. T56.1X4
    Toxic effect of mercury and its compounds, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  13. T56.2
    Toxic effects of chromium and its compounds
    Header
  14. T56.2X
    Toxic effects of chromium and its compounds
    Header
  15. T56.2X1
    Toxic effect of chromium and its compounds, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Toxic effects of chromium and its compounds NOS
  16. T56.2X2
    Toxic effect of chromium and its compounds, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  17. T56.2X3
    Toxic effect of chromium and its compounds, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  18. T56.2X4
    Toxic effect of chromium and its compounds, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  19. T56.3
    Toxic effects of cadmium and its compounds
    Header
  20. T56.3X
    Toxic effects of cadmium and its compounds
    Header
  21. T56.3X1
    Toxic effect of cadmium and its compounds, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Toxic effects of cadmium and its compounds NOS
  22. T56.3X2
    Toxic effect of cadmium and its compounds, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  23. T56.3X3
    Toxic effect of cadmium and its compounds, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  24. T56.3X4
    Toxic effect of cadmium and its compounds, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  25. T56.4
    Toxic effects of copper and its compounds
    Header
  26. T56.4X
    Toxic effects of copper and its compounds
    Header
  27. T56.4X1
    Toxic effect of copper and its compounds, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Toxic effects of copper and its compounds NOS
  28. T56.4X2
    Toxic effect of copper and its compounds, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  29. T56.4X3
    Toxic effect of copper and its compounds, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  30. T56.4X4
    Toxic effect of copper and its compounds, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  31. T56.5
    Toxic effects of zinc and its compounds
    Header
  32. T56.5X
    Toxic effects of zinc and its compounds
    Header
  33. T56.5X1
    Toxic effect of zinc and its compounds, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Toxic effects of zinc and its compounds NOS
  34. T56.5X2
    Toxic effect of zinc and its compounds, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  35. T56.5X3
    Toxic effect of zinc and its compounds, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  36. T56.5X4
    Toxic effect of zinc and its compounds, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  37. T56.6
    Toxic effects of tin and its compounds
    Header
  38. T56.6X
    Toxic effects of tin and its compounds
    Header
  39. T56.6X1
    Toxic effect of tin and its compounds, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Toxic effects of tin and its compounds NOS
  40. T56.6X2
    Toxic effect of tin and its compounds, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  41. T56.6X3
    Toxic effect of tin and its compounds, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  42. T56.6X4
    Toxic effect of tin and its compounds, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  43. T56.7
    Toxic effects of beryllium and its compounds
    Header
  44. T56.7X
    Toxic effects of beryllium and its compounds
    Header
  45. T56.7X1
    Toxic effect of beryllium and its compounds, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Toxic effects of beryllium and its compounds NOS
  46. T56.7X2
    Toxic effect of beryllium and its compounds, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  47. T56.7X3
    Toxic effect of beryllium and its compounds, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  48. T56.7X4
    Toxic effect of beryllium and its compounds, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  49. T56.8
    Toxic effects of other metals
    Header
  50. T56.81
    Toxic effect of thallium
    Header
  51. T56.811
    Toxic effect of thallium, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Toxic effect of thallium NOS
  52. T56.812
    Toxic effect of thallium, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  53. T56.813
    Toxic effect of thallium, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  54. T56.814
    Toxic effect of thallium, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  55. T56.82
    Toxic effect of gadolinium
    Header
    Excludes1 1

    Excludes1

    • adverse effect of diagnostic agents (T50.8X5-) T50.8X5
  56. T56.821
    Toxic effect of gadolinium, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Toxic effect of gadolinium NOS
  57. T56.822
    Toxic effect of gadolinium, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  58. T56.823
    Toxic effect of gadolinium, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  59. T56.824
    Toxic effect of gadolinium, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  60. T56.89
    Toxic effects of other metals
    Header
  61. T56.891
    Toxic effect of other metals, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Toxic effects of other metals NOS
  62. T56.892
    Toxic effect of other metals, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  63. T56.893
    Toxic effect of other metals, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  64. T56.894
    Toxic effect of other metals, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  65. T56.9
    Toxic effects of unspecified metal
    Header
  66. T56.91
    Toxic effect of unspecified metal, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  67. T56.92
    Toxic effect of unspecified metal, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  68. T56.93
    Toxic effect of unspecified metal, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  69. T56.94
    Toxic effect of unspecified metal, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters

Sources of each column. Rows marked +7th need a 7th character: pick one to build the full code; its code card has its own flags.

Instructions

At T56

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) T57.0
  • manganese and its compounds (T57.2) T57.2

Use additional code

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

Notes that also apply

Block T51-T65 instructions (Notes 1, Excludes1 1, Use additional code 4): printed on the block page.

Chapter 19 instructions (Notes 2, Excludes2 2, Use additional code 1): printed on the chapter 19 page.

7th characters

7th characters for T56 defined here

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

7th characters for T56
7thMeaning (NCHS)
Ainitial encounter
Dsubsequent encounter
Ssequela

A code that takes a 7th character is invalid without it; the placeholder X fills a code shorter than 6 characters (Official Guidelines I.A.5). How 7th characters work.

Index entries

  • Painter's colic → T56.0
  • Plumbism → T56.0
  • Mercurialism → T56.1
  • Minamata disease → T56.1
  • Palsylead → T56.0
  • Paralysis, paralytic (complete) (incomplete)lead → T56.0
  • Paralysis, paralytic (complete) (incomplete)saturnine → T56.0
  • Poisoning (acute)lead → T56.0-
  • Pinkdisease → T56.1
  • Polyneuritis, polyneuriticerythredema → T56.1
  • Tremor(s)mercurial → T56.1
  • Meningoencephalitisin (due to)mercury → T56.1
  • Meningoencephalitistoxic NECdue to mercury → T56.1
  • Myelopathy (spinal cord)in (due to)mercury → T56.1

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy