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