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ICD-9-CM diagnosis code (retired)

978.6 — Poisoning by pertussis vaccine, including combinations with a pertussis component

ICD-9-CM was replaced by ICD-10 on October 1, 2015. These are the ICD-10-CM equivalents from the CMS General Equivalence Mappings.

About ICD-9-CM 978.6

978.6 is an ICD-9-CM diagnosis code for poisoning by pertussis vaccine, including combinations with a pertussis component. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-CM took over.

The CMS General Equivalence Mappings translate it to 4 ICD-10-CM codes, such as T50.A11A (Poisoning by pertussis vaccine, including combinations with a pertussis component, accidental (unintentional), initial encounter), T50.A12A (Poisoning by pertussis vaccine, including combinations with a pertussis component, intentional self-harm, initial encounter) and T50.A13A (Poisoning by pertussis vaccine, including combinations with a pertussis component, assault, initial encounter). All of these are approximate matches, so review the record to pick the right one.

ICD-10-CM equivalents

Common questions about 978.6

What is the ICD-10 code for ICD-9 978.6?

The GEMs map 978.6 to ICD-10-CM T50.A11A, T50.A12A, T50.A13A and T50.A14A.

GEMs are a translation aid, not a substitute for coding from the record. The 2027 ICD-10 code set has changed since the last GEMs release in 2018. Page updated September 29, 2026.