All ICD10 Codes

T65

Non-Billable
ChapterS00–T88
Rankcategory
Official Description

Toxic effect of other and unspecified substances

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88).

CH19 Parent Instructions

Excludes2(Not included here)
Use Additional Code
  • code to identify any retained foreign body, if applicable (Z18.-)

T51-T65 Parent Instructions

Excludes1(Not coded here)
  • contact with and (suspected) exposure to toxic substances (Z77.-)
Use Additional Code
  • code(s):
  • for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)
  • personal history of foreign body fully removed (Z87.821)
  • to identify any retained foreign body, if applicable (Z18.-)

Clinical Hierarchy

CH19Injury, poisoning and certain other consequences of external causes (S00-T88)
T51-T65Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)
T65Toxic effect of other and unspecified substances
T65.0Toxic effect of cyanides
T65.1Toxic effect of strychnine and its salts
T65.2Toxic effect of tobacco and nicotine
T65.3Toxic effect of nitroderivatives and aminoderivatives of benzene and its homologues
T65.4Toxic effect of carbon disulfide
T65.5Toxic effect of nitroglycerin and other nitric acids and esters
T65.6Toxic effect of paints and dyes, not elsewhere classified
T65.8Toxic effect of other specified substances
T65.9Toxic effect of unspecified substance

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to T65:

blockT51-T65
Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)
View context instructions
chapterCH19
Injury, poisoning and certain other consequences of external causes (S00-T88)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to T65. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

7 raw paths
Poisoning (acute)5 unique routes
algae and toxins→T65
latex→T65
nicotine (tobacco)→T65
specified substance NEC→T65
tobacco (nicotine)→T65
Red tide1 unique routes
Direct index entry→T65
Toxic (poisoning)1 unique routes
Direct index entry→T65

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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