Icd 10 code for hfref with acute exacerbation July 8, 2019 16 32 64 128 Icd 10 code for acute on chronic hfref exacerbation Icd 10 code for acute chf exacerbation unspecified Icd 10 code for acute exacerbation of systolic chf Hfref with acute exacerbation icd 10