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Home / ICD-10-CM / Chapter 19: Injury, poisoning and certain other consequences of external causes (S00-T88) / Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)

T52.821: Toxic effect of cycloparaffins, accidental (unintentional)

ICD-10-CM code T52.821

New code ยท FY2027

Not billable: this is a header. Use one of the more specific codes below.

  • New code, effective October 1, 2026 (FY2027).

Code breakdown

T52.821

  1. T52CategoryToxic effect of organic solvents
  2. 8Character 4Toxic effects of other organic solvents
  3. 2Character 5Toxic effects of cycloparaffins
  4. 1Character 6Toxic effect of cycloparaffins, accidental (unintentional)

Coding notes

Inclusion terms

  • Toxic effects of cycloparaffins NOS

Inclusion terms (from T52.82)

  • Toxic effects of naphthenes
  • Toxic effects of cycloalkanes

Excludes1 (from T52)

  • halogen derivatives of aliphatic and aromatic hydrocarbons (T53.-)

7th character (from T52)

  • The appropriate 7th character is to be added to each code from category T52

7th characters (category T52)

  • A initial encounter
  • D subsequent encounter
  • S sequela

Check this code

All FY2027 ICD-10-CM changes

ICD-10-CM codes and descriptions are from the CMS and NCHS code files. Coverage is from the CMS Medicare Coverage Database billing and coding articles.