Non-Billable / Non-Specific Code
ICD-10-CM T78 is the diagnosis code for Adverse effects, not elsewhere classified. This code falls under the section "Other and unspecified effects of external causes" 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 T78. If the patient has both, code each condition separately:
Understanding where T78 sits in the ICD-10-CM classification helps ensure proper coding:
No, T78 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
T78 is the ICD-10-CM diagnosis code for "Adverse effects, not elsewhere classified". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
T78 is located in Section T66-T78 â "Other and unspecified effects of external causes" within Chapter 19 of the ICD-10-CM Tabular List.
T78 has 6 sub-code(s) that provide more specific detail: T78.0, T78.1, T78.2, T78.3, T78.4 and more.
Use T78 when the patients documented diagnosis matches "Adverse effects, 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 Adverse effects, not elsewhere classified is T78.
No, T78 is non-billable. Use a more specific sub-code for primary diagnosis billing.
T78 is in Chapter 19 of the ICD-10-CM Tabular List.
Yes, T78 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.