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  5. Toxic effect of corrosive substances (T54)

Toxic effect of corrosive substances (T54)

The T54 ICD-10 codes describe the toxic effects caused by exposure to corrosive substances. These codes classify poisoning by various corrosive chemicals; such as phenol, corrosive organic compounds, acids, alkalis, and unspecified corrosive agents; detailing whether exposure was accidental, intentional (self-harm), assault-related, or undetermined.

These codes are specifically used to document medical conditions resulting from harmful contact with corrosive agents that damage tissues, including chemical burns or systemic poisoning. For example, the ICD-10 code for toxic effects of phenol and its homologues (commonly known as carbolic acid poisoning or chlorinated phenol adverse reaction) falls under T54.0. Similarly, toxic effects from corrosive acids like hydrochloric or sulfuric acid are found under T54.2, with synonyms such as acid chemical burns or vitriol burning. Codes like T54.3 cover alkali poisonings, including injuries from substances like lye or sodium hydroxide. Each category further specifies the context of the toxic event; whether accidental, self-inflicted, assault, or undetermined; with detailed subcodes indicating initial encounters, subsequent visits, or late effects (sequela). The T54 code group thus guides accurate coding of corrosive substance poisonings for clinical, legal, and billing purposes.

  • 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 corrosive substances (T54)

        • T54 Toxic effect of corrosive substances
        • T54.0 Toxic effects of phenol and phenol homologues
        • T54.0X Toxic effects of phenol and phenol homologues
        • T54.0X1 Toxic effect of phenol and phenol homologues, accidental (unintentional)
        • T54.0X1A Toxic effect of phenol and phenol homologues, accidental (unintentional), initial encounter
        • T54.0X1D Toxic effect of phenol and phenol homologues, accidental (unintentional), subsequent encounter
        • T54.0X1S Toxic effect of phenol and phenol homologues, accidental (unintentional), sequela
        • T54.0X2 Toxic effect of phenol and phenol homologues, intentional self-harm
        • T54.0X2A Toxic effect of phenol and phenol homologues, intentional self-harm, initial encounter
        • T54.0X2D Toxic effect of phenol and phenol homologues, intentional self-harm, subsequent encounter
        • T54.0X2S Toxic effect of phenol and phenol homologues, intentional self-harm, sequela
        • T54.0X3 Toxic effect of phenol and phenol homologues, assault
        • T54.0X3A Toxic effect of phenol and phenol homologues, assault, initial encounter
        • T54.0X3D Toxic effect of phenol and phenol homologues, assault, subsequent encounter
        • T54.0X3S Toxic effect of phenol and phenol homologues, assault, sequela
        • T54.0X4 Toxic effect of phenol and phenol homologues, undetermined
        • T54.0X4A Toxic effect of phenol and phenol homologues, undetermined, initial encounter
        • T54.0X4D Toxic effect of phenol and phenol homologues, undetermined, subsequent encounter
        • T54.0X4S Toxic effect of phenol and phenol homologues, undetermined, sequela
        • T54.1 Toxic effects of other corrosive organic compounds
        • T54.1X Toxic effects of other corrosive organic compounds
        • T54.1X1 Toxic effect of other corrosive organic compounds, accidental (unintentional)
        • T54.1X1A Toxic effect of other corrosive organic compounds, accidental (unintentional), initial encounter
        • T54.1X1D Toxic effect of other corrosive organic compounds, accidental (unintentional), subsequent encounter
        • T54.1X1S Toxic effect of other corrosive organic compounds, accidental (unintentional), sequela
        • T54.1X2 Toxic effect of other corrosive organic compounds, intentional self-harm
        • T54.1X2A Toxic effect of other corrosive organic compounds, intentional self-harm, initial encounter
        • T54.1X2D Toxic effect of other corrosive organic compounds, intentional self-harm, subsequent encounter
        • T54.1X2S Toxic effect of other corrosive organic compounds, intentional self-harm, sequela
        • T54.1X3 Toxic effect of other corrosive organic compounds, assault
        • T54.1X3A Toxic effect of other corrosive organic compounds, assault, initial encounter
        • T54.1X3D Toxic effect of other corrosive organic compounds, assault, subsequent encounter
        • T54.1X3S Toxic effect of other corrosive organic compounds, assault, sequela
        • T54.1X4 Toxic effect of other corrosive organic compounds, undetermined
        • T54.1X4A Toxic effect of other corrosive organic compounds, undetermined, initial encounter
        • T54.1X4D Toxic effect of other corrosive organic compounds, undetermined, subsequent encounter
        • T54.1X4S Toxic effect of other corrosive organic compounds, undetermined, sequela
        • T54.2 Toxic effects of corrosive acids and acid-like substances
        • T54.2X Toxic effects of corrosive acids and acid-like substances
        • T54.2X1 Toxic effect of corrosive acids and acid-like substances, accidental (unintentional)
        • T54.2X1A Toxic effect of corrosive acids and acid-like substances, accidental (unintentional), initial encounter
        • T54.2X1D Toxic effect of corrosive acids and acid-like substances, accidental (unintentional), subsequent encounter
        • T54.2X1S Toxic effect of corrosive acids and acid-like substances, accidental (unintentional), sequela
        • T54.2X2 Toxic effect of corrosive acids and acid-like substances, intentional self-harm
        • T54.2X2A Toxic effect of corrosive acids and acid-like substances, intentional self-harm, initial encounter
        • T54.2X2D Toxic effect of corrosive acids and acid-like substances, intentional self-harm, subsequent encounter
        • T54.2X2S Toxic effect of corrosive acids and acid-like substances, intentional self-harm, sequela
        • T54.2X3 Toxic effect of corrosive acids and acid-like substances, assault
        • T54.2X3A Toxic effect of corrosive acids and acid-like substances, assault, initial encounter
        • T54.2X3D Toxic effect of corrosive acids and acid-like substances, assault, subsequent encounter
        • T54.2X3S Toxic effect of corrosive acids and acid-like substances, assault, sequela
        • T54.2X4 Toxic effect of corrosive acids and acid-like substances, undetermined
        • T54.2X4A Toxic effect of corrosive acids and acid-like substances, undetermined, initial encounter
        • T54.2X4D Toxic effect of corrosive acids and acid-like substances, undetermined, subsequent encounter
        • T54.2X4S Toxic effect of corrosive acids and acid-like substances, undetermined, sequela
        • T54.3 Toxic effects of corrosive alkalis and alkali-like substances
        • T54.3X Toxic effects of corrosive alkalis and alkali-like substances
        • T54.3X1 Toxic effect of corrosive alkalis and alkali-like substances, accidental (unintentional)
        • T54.3X1A Toxic effect of corrosive alkalis and alkali-like substances, accidental (unintentional), initial encounter
        • T54.3X1D Toxic effect of corrosive alkalis and alkali-like substances, accidental (unintentional), subsequent encounter
        • T54.3X1S Toxic effect of corrosive alkalis and alkali-like substances, accidental (unintentional), sequela
        • T54.3X2 Toxic effect of corrosive alkalis and alkali-like substances, intentional self-harm
        • T54.3X2A Toxic effect of corrosive alkalis and alkali-like substances, intentional self-harm, initial encounter
        • T54.3X2D Toxic effect of corrosive alkalis and alkali-like substances, intentional self-harm, subsequent encounter
        • T54.3X2S Toxic effect of corrosive alkalis and alkali-like substances, intentional self-harm, sequela
        • T54.3X3 Toxic effect of corrosive alkalis and alkali-like substances, assault
        • T54.3X3A Toxic effect of corrosive alkalis and alkali-like substances, assault, initial encounter
        • T54.3X3D Toxic effect of corrosive alkalis and alkali-like substances, assault, subsequent encounter
        • T54.3X3S Toxic effect of corrosive alkalis and alkali-like substances, assault, sequela
        • T54.3X4 Toxic effect of corrosive alkalis and alkali-like substances, undetermined
        • T54.3X4A Toxic effect of corrosive alkalis and alkali-like substances, undetermined, initial encounter
        • T54.3X4D Toxic effect of corrosive alkalis and alkali-like substances, undetermined, subsequent encounter
        • T54.3X4S Toxic effect of corrosive alkalis and alkali-like substances, undetermined, sequela
        • T54.9 Toxic effects of unspecified corrosive substance
        • T54.91 Toxic effect of unspecified corrosive substance, accidental (unintentional)
        • T54.91XA Toxic effect of unspecified corrosive substance, accidental (unintentional), initial encounter
        • T54.91XD Toxic effect of unspecified corrosive substance, accidental (unintentional), subsequent encounter
        • T54.91XS Toxic effect of unspecified corrosive substance, accidental (unintentional), sequela
        • T54.92 Toxic effect of unspecified corrosive substance, intentional self-harm
        • T54.92XA Toxic effect of unspecified corrosive substance, intentional self-harm, initial encounter
        • T54.92XD Toxic effect of unspecified corrosive substance, intentional self-harm, subsequent encounter
        • T54.92XS Toxic effect of unspecified corrosive substance, intentional self-harm, sequela
        • T54.93 Toxic effect of unspecified corrosive substance, assault
        • T54.93XA Toxic effect of unspecified corrosive substance, assault, initial encounter
        • T54.93XD Toxic effect of unspecified corrosive substance, assault, subsequent encounter
        • T54.93XS Toxic effect of unspecified corrosive substance, assault, sequela
        • T54.94 Toxic effect of unspecified corrosive substance, undetermined
        • T54.94XA Toxic effect of unspecified corrosive substance, undetermined, initial encounter
        • T54.94XD Toxic effect of unspecified corrosive substance, undetermined, subsequent encounter
        • T54.94XS Toxic effect of unspecified corrosive substance, undetermined, sequela

Instructional Notations

7th Character Note

Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.

  • The appropriate 7th character is to be added to each code from category T54

7th Character

Indicates that a seventh character is to be assigned to codes in a subcategory.

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

Clinical Terms

The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.

Oxalates

Derivatives of OXALIC ACID. Included under this heading are a broad variety of acid forms, salts, esters, and amides that are derived from the ethanedioic acid structure.

Oxalic Acid

A strong dicarboxylic acid occurring in many plants and vegetables. It is produced in the body by metabolism of glyoxylic acid or ascorbic acid. It is not metabolized but excreted in the urine. It is used as an analytical reagent and general reducing agent.