Billable / Specific Code
ICD-10-CM T40.1X1 is the diagnosis code for Poisoning by heroin, accidental (unintentional). This code falls under the section "Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances" within Chapter 19 — Injury, poisoning and certain other consequences of external causes (S00-T88). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where T40.1X1 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, T40.1X1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
T40.1X1 is the ICD-10-CM diagnosis code for "Poisoning by heroin, accidental (unintentional)". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of T40.1X1 is T40.1X ("Poisoning by and adverse effect of heroin"). T40.1X1 provides a more specific classification within this category.
T40.1X1 is located in Section T36-T50 — "Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances" within Chapter 19 of the ICD-10-CM Tabular List.
T40.1X1 has 1918 sub-code(s) that provide more specific detail: A00, A01, A02, A03, A04 and more.
Use T40.1X1 when the patients documented diagnosis matches "Poisoning by heroin, accidental (unintentional)" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Poisoning by heroin, accidental (unintentional) is T40.1X1.
Yes, T40.1X1 can be used as a primary diagnosis code since it is billable and specific.
T40.1X1 is in Chapter 19 of the ICD-10-CM Tabular List.
Yes, T40.1X1 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.