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T78

⚠ Non-billable (Header)

Adverse effects, not elsewhere classified

Injury, poisoning and certain other consequences of external causes (S00-T88)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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⚠️ Excludes2

direct

May be coded together if both conditions coexist

  • • complications of surgical and medical care NEC (T80-T88)

Child Codes (6)

T78.0Anaphylactic reaction due to foodT78.1Other adverse food reactions, not elsewhere classifiedT78.2Anaphylactic shock, unspecifiedT78.3Angioneurotic edemaT78.4Other and unspecified allergyT78.8Other adverse effects, not elsewhere classified

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Code Information

CodeT78
BillableNo — Header code
CategoryInjury, poisoning and certain other consequences of external causes (S00-T88)
Excludes10 rule(s)
Excludes21 note(s)
Child codes6

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)