Non-Billable / Non-Specific Code
ICD-10-CM T43 is the diagnosis code for Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified. This code falls under the section "Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances" within Chapter 19 â Injury, poisoning and certain other consequences of external causes (S00-T88). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions are not included in T43. If the patient has both, code each condition separately:
Understanding where T43 sits in the ICD-10-CM classification helps ensure proper coding:
No, T43 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
T43 is the ICD-10-CM diagnosis code for "Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
T43 is located in Section T36-T50 â "Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances" within Chapter 19 of the ICD-10-CM Tabular List.
T43 has 9 sub-code(s) that provide more specific detail: T43.0, T43.1, T43.2, T43.3, T43.4 and more.
Use T43 when the patients documented diagnosis matches "Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified" 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, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified is T43.
No, T43 is non-billable. Use a more specific sub-code for primary diagnosis billing.
T43 is in Chapter 19 of the ICD-10-CM Tabular List.
Yes, T43 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.