DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

T53 Toxic effect of halogen derivatives of aliphatic and aromatic hydrocarbons

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

T53 is not billable. The category heads 108 billable codes in FY2027, grouped under 9 subdivisions. Its codes take a 7th character, so none is complete with fewer than 7 characters.

Billable codes
108
Subdivisions
9
CC / MCC codes
0 / 0
HCC V28 codes
9
New FY2027
0
Index entries
0

Codes in T53

  1. T53.0
    Toxic effects of carbon tetrachloride
    Header
    Inclusion terms 1

    Inclusion terms

    • Toxic effects of tetrachloromethane
  2. T53.0X
    Toxic effects of carbon tetrachloride
    Header
  3. T53.0X1
    Toxic effect of carbon tetrachloride, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Toxic effects of carbon tetrachloride NOS
  4. T53.0X2
    Toxic effect of carbon tetrachloride, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  5. T53.0X3
    Toxic effect of carbon tetrachloride, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  6. T53.0X4
    Toxic effect of carbon tetrachloride, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  7. T53.1
    Toxic effects of chloroform
    Header
    Inclusion terms 1

    Inclusion terms

    • Toxic effects of trichloromethane
  8. T53.1X
    Toxic effects of chloroform
    Header
  9. T53.1X1
    Toxic effect of chloroform, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Toxic effects of chloroform NOS
  10. T53.1X2
    Toxic effect of chloroform, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  11. T53.1X3
    Toxic effect of chloroform, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  12. T53.1X4
    Toxic effect of chloroform, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  13. T53.2
    Toxic effects of trichloroethylene
    Header
    Inclusion terms 1

    Inclusion terms

    • Toxic effects of trichloroethene
  14. T53.2X
    Toxic effects of trichloroethylene
    Header
  15. T53.2X1
    Toxic effect of trichloroethylene, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Toxic effects of trichloroethylene NOS
  16. T53.2X2
    Toxic effect of trichloroethylene, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  17. T53.2X3
    Toxic effect of trichloroethylene, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  18. T53.2X4
    Toxic effect of trichloroethylene, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  19. T53.3
    Toxic effects of tetrachloroethylene
    Header
    Inclusion terms 2

    Inclusion terms

    • Toxic effects of perchloroethylene
    • Toxic effect of tetrachloroethene
  20. T53.3X
    Toxic effects of tetrachloroethylene
    Header
  21. T53.3X1
    Toxic effect of tetrachloroethylene, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Toxic effects of tetrachloroethylene NOS
  22. T53.3X2
    Toxic effect of tetrachloroethylene, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  23. T53.3X3
    Toxic effect of tetrachloroethylene, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  24. T53.3X4
    Toxic effect of tetrachloroethylene, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  25. T53.4
    Toxic effects of dichloromethane
    Header
    Inclusion terms 1

    Inclusion terms

    • Toxic effects of methylene chloride
  26. T53.4X
    Toxic effects of dichloromethane
    Header
  27. T53.4X1
    Toxic effect of dichloromethane, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Toxic effects of dichloromethane NOS
  28. T53.4X2
    Toxic effect of dichloromethane, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  29. T53.4X3
    Toxic effect of dichloromethane, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  30. T53.4X4
    Toxic effect of dichloromethane, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  31. T53.5
    Toxic effects of chlorofluorocarbons
    Header
  32. T53.5X
    Toxic effects of chlorofluorocarbons
    Header
  33. T53.5X1
    Toxic effect of chlorofluorocarbons, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Toxic effects of chlorofluorocarbons NOS
  34. T53.5X2
    Toxic effect of chlorofluorocarbons, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  35. T53.5X3
    Toxic effect of chlorofluorocarbons, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  36. T53.5X4
    Toxic effect of chlorofluorocarbons, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  37. T53.6
    Toxic effects of other halogen derivatives of aliphatic hydrocarbons
    Header
  38. T53.6X
    Toxic effects of other halogen derivatives of aliphatic hydrocarbons
    Header
  39. T53.6X1
    Toxic effect of other halogen derivatives of aliphatic hydrocarbons, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Toxic effects of other halogen derivatives of aliphatic hydrocarbons NOS
  40. T53.6X2
    Toxic effect of other halogen derivatives of aliphatic hydrocarbons, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  41. T53.6X3
    Toxic effect of other halogen derivatives of aliphatic hydrocarbons, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  42. T53.6X4
    Toxic effect of other halogen derivatives of aliphatic hydrocarbons, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  43. T53.7
    Toxic effects of other halogen derivatives of aromatic hydrocarbons
    Header
  44. T53.7X
    Toxic effects of other halogen derivatives of aromatic hydrocarbons
    Header
  45. T53.7X1
    Toxic effect of other halogen derivatives of aromatic hydrocarbons, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Toxic effects of other halogen derivatives of aromatic hydrocarbons NOS
  46. T53.7X2
    Toxic effect of other halogen derivatives of aromatic hydrocarbons, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  47. T53.7X3
    Toxic effect of other halogen derivatives of aromatic hydrocarbons, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  48. T53.7X4
    Toxic effect of other halogen derivatives of aromatic hydrocarbons, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  49. T53.9
    Toxic effects of unspecified halogen derivatives of aliphatic and aromatic hydrocarbons
    Header
  50. T53.91
    Toxic effect of unspecified halogen derivatives of aliphatic and aromatic hydrocarbons, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  51. T53.92
    Toxic effect of unspecified halogen derivatives of aliphatic and aromatic hydrocarbons, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  52. T53.93
    Toxic effect of unspecified halogen derivatives of aliphatic and aromatic hydrocarbons, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  53. T53.94
    Toxic effect of unspecified halogen derivatives of aliphatic and aromatic hydrocarbons, 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

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 T53 defined here

The appropriate 7th character is to be added to each code from category T53

7th characters for T53
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.

Hierarchy