T65.94XA
✓ Billable
Toxic effect of unspecified substance, undetermined, initial encounter
ICD-10-CM · FY2026 · Injury, Poisoning and Certain Other Consequences of External Causes
Code
T65.94XA
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Injury, Poisoning and Certain Other Consequences of External Causes
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code T65.94XA?
ICD-10-CM code T65.94XA represents Toxic effect of unspecified substance, undetermined, initial encounter. It is a billable diagnosis code in the Injury, Poisoning and Certain Other Consequences of External Causes chapter, effective October 1, 2025 – September 30, 2026.
Is T65.94XA billable?
Yes. T65.94XA is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is T65.94XA in?
T65.94XA belongs to the Injury, Poisoning and Certain Other Consequences of External Causes chapter (S00–T88) of ICD-10-CM.
Related codes in the T65 category
T65
Toxic effect of other and unspecified substances
Non-billable
T65.0
Toxic effect of cyanides
Non-billable
T65.1
Toxic effect of strychnine and its salts
Non-billable
T65.2
Toxic effect of tobacco and nicotine
Non-billable
T65.3
Toxic effect of nitroderivatives and aminoderivatives of benzene and its homologues
Non-billable
T65.4
Toxic effect of carbon disulfide
Non-billable
T65.5
Toxic effect of nitroglycerin and other nitric acids and esters
Non-billable
T65.6
Toxic effect of paints and dyes, not elsewhere classified
Non-billable
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