Non-Billable / Non-Specific Code
ICD-10-CM T78.1 is the diagnosis code for Other adverse food reactions, 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 should never be coded at the same time as T78.1. They are mutually exclusive:
The following conditions are not included in T78.1. If the patient has both, code each condition separately:
Understanding where T78.1 sits in the ICD-10-CM classification helps ensure proper coding:
No, T78.1 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
T78.1 is the ICD-10-CM diagnosis code for "Other adverse food reactions, not elsewhere classified". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of T78.1 is T78 ("Adverse effects, not elsewhere classified"). T78.1 provides a more specific classification within this category.
T78.1 is located in Section T66-T78 â "Other and unspecified effects of external causes" within Chapter 19 of the ICD-10-CM Tabular List.
T78.1 has 3 sub-code(s) that provide more specific detail: T78.11, T78.12, T78.19.
Use T78.1 when the patients documented diagnosis matches "Other adverse food reactions, 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 Other adverse food reactions, not elsewhere classified is T78.1.
No, T78.1 is non-billable. Use a more specific sub-code for primary diagnosis billing.
T78.1 is in Chapter 19 of the ICD-10-CM Tabular List.
Type 1 Excludes for T78.1 include: anaphylactic reaction or shock due to adverse food reaction (T78.0-); anaphylactic reaction due to food (T78.0-); bacterial food borne intoxications (A05.-).
Yes, T78.1 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.