Flu icd 9 July 8, 2019 16 32 64 128 Flu icd 9 code Flu icd 9 dx Stomach flu icd 9 Gastric flu icd 9 Flu symptoms icd 9 Flu vaccine icd 9 Viral flu icd 9 Flu shot icd 9 Flu b icd 9 Flu infection icd 9 Flu like symptoms icd 9 Flu like illness icd 9 Cold and flu icd 9 Icd 9 flu unspecified