Icd 10 hfref exacerbation July 8, 2019 16 32 64 128 Icd 10 acute hfref exacerbation Icd 10 code hfref exacerbation Icd 10 code for acute hfref exacerbation Icd 10 code for acute exacerbation of systolic chf Icd 10 code for exacerbation Chf exacerbations icd 10 Icd 10 code for acute chf exacerbation unspecified