Convert ICD-10-CM T50.A11A to ICD-9-CM

T50.A11A can be converted to ICD-9-CM using the following scenario:
Scenario 1
  • 2015 ICD-9-CM 978.6 Poisoning by pertussis vaccine, including combinations with a pertussis component
  • With:
  • 2015 ICD-9-CM E858.1 Accidental poisoning by primarily systemic agents

Note: approximate conversions between ICD-9-CM codes and ICD-10-CM codes may require clinical interpretation in order to determine the most appropriate conversion code(s) for your specific coding situation.

Source: 2020 ICD-10-CM CMS General Equivalence Mappings.