DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Block · Chapter 19

T51-T65 Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)

Block T51-T65 groups 15 categories with 1,680 billable codes in FY2027. 60 codes are new this year.

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)

Neighbouring blocks

Categories
15
Billable codes
1,680
CC codes
0
MCC codes
0
HCC V28 codes
135
New FY2027
60

Categories in T51-T65

  • T51

    Toxic effect of alcohol

    –

    • 72 billable codes
    • 6 with HCC
  • T52

    Toxic effect of organic solvents

    –

    • 108 billable codes
    • 6 with HCC
    • 36 new
  • T53

    Toxic effect of halogen derivatives of aliphatic and aromatic hydrocarbons

    –

    • 108 billable codes
    • 9 with HCC
  • T54

    Toxic effect of corrosive substances

    Necrosis, necrotic (ischemic)phosphorus → T54.2

    • 60 billable codes
    • 5 with HCC
  • T55

    Toxic effect of soaps and detergents

    –

    • 24 billable codes
    • 2 with HCC
  • T56

    Toxic effect of metals

    Plumbism → T56.0

    • 144 billable codes
    • 12 with HCC
  • T57

    Toxic effect of other inorganic substances

    –

    • 72 billable codes
    • 6 with HCC
  • T58

    Toxic effect of carbon monoxide

    –

    • 60 billable codes
    • 5 with HCC
  • T59

    Toxic effect of other gases, fumes and vapors

    Vapor asphyxia or suffocation → T59.9

    • 144 billable codes
    • 11 with HCC
    • 12 new
  • T60

    Toxic effect of pesticides

    –

    • 84 billable codes
    • 7 with HCC
  • T61

    Toxic effect of noxious substances eaten as seafood

    Poisoning (acute)ciguatera fish → T61.0-

    • 72 billable codes
    • 6 with HCC
  • T62

    Toxic effect of other noxious substances eaten as food

    Poisoning (acute)food NECnoxious or naturally toxic → T62.9-

    • 60 billable codes
    • 5 with HCC
  • T63

    Toxic effect of contact with venomous animals and plants

    Bee sting (with allergic or anaphylactic shock) → T63.44-

    • 456 billable codes
    • 38 with HCC
  • T64

    Toxic effect of aflatoxin and other mycotoxin food contaminants

    –

    • 24 billable codes
    • 2 with HCC
  • T65

    Toxic effect of other and unspecified substances

    Red tide → T65.82-

    • 192 billable codes
    • 15 with HCC
    • 12 new

Index main terms

  • Poisoning (acute) → T56, T61, T62, T65 (18 entries)
  • Inhalation → T59 (4 entries)
  • Meningoencephalitis → T56 (2 entries)
  • Paralysis, paralytic (complete) (incomplete) → T56 (2 entries)
  • Allergy, allergic (reaction) (to) → T63 (1 entry)
  • Bee sting (with allergic or anaphylactic shock) → T63 (1 entry)
  • Conflagration → T59 (1 entry)
  • Effect, adverse → T59 (1 entry)
  • Mercurialism → T56 (1 entry)
  • Minamata disease → T56 (1 entry)
  • Myelopathy (spinal cord) → T56 (1 entry)
  • Necrosis, necrotic (ischemic) → T54 (1 entry)
  • Painter's colic → T56 (1 entry)
  • Palsy → T56 (1 entry)
  • Pink → T56 (1 entry)

+6 more main terms; the search box finds them by word.

Block instructions

Notes

  • When no intent is indicated code to accidental. Undetermined intent is only for use when there is specific documentation in the record that the intent of the toxic effect cannot be determined.

Excludes1

  • contact with and (suspected) exposure to toxic substances (Z77.-) Z77

Use additional code

  • code(s):
  • for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70) J60 J70
  • personal history of foreign body fully removed (Z87.821) Z87.821
  • to identify any retained foreign body, if applicable (Z18.-) Z18

Notes that also apply

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