ICD-10-CM > S00-T88 > T36-T50 > T50 > T50.A > T50.A1 > T50.A15 T50.A15 Adverse effect of pertussis vaccine, including combinations with a pertussis component Non-Billable/Non-Specific Codes T50.A15A..., initial encounterT50.A15D..., subsequent encounterT50.A15S..., sequela