T80.5 Anaphylactic reaction due to serum
The ICD-10-CM code for Anaphylactic reaction due to serum is T80.5 (FY2026). It is a non-billable category code — select a more specific code below for claims.
Classification
- Section
- T80-T88: Complications of surgical and medical care, not elsewhere classified (T80-T88)
- Category T80
- 53 codes (38 billable)
- FY2026 Status
- Stable since FY2024
Inclusion Terms
- Allergic shock due to serum
- Anaphylactic shock due to serum
- Anaphylactoid reaction due to serum
- Anaphylaxis due to serum
Official Coding Guidelines
Complications of surgery and other medical careG. Complications of surgery and other medical care When the admission is for treatment of a complication resulting from surgery or other medical care, the complication code is sequenced as the principal diagnosis. If the complication is classified to the T80-T88 series and the code lacks the necessary specificity in describing the complication, an additional code for the specific complication should be assigned.
Sequence blood vessel/nerve injury first (fragment)injury is to the blood vessels or nerves, that injury should be sequenced first.
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026