Icd 9 code for influenza July 8, 2019 16 32 64 128 Icd 9 code for influenza unspecified Icd 9 code for influenza vaccination Icd 9 code for influenza with respiratory manifestations Icd 9 code for influenza a infection Icd 9 code for influenza virus infection Icd 9 code for haemophilus influenzae Influenza a icd 9 Icd 9 code for flu like symptoms