ICD code description I10 essential (primary) hypertension I11 hypertensive heart disease I11.0 hypertensive heart disease with (congestive) heart failure I11.9 hypertensive heart disease without (congestive) heart failure I12 hypertensive renal disease I12.0 hypertensive renal disease with renal failure I12.9 hypertensive renal disease without renal failure I13 hypertensive heart and renal disease I13.0 hypertensive heart and renal disease with (congestive) heart failure I13.1 hypertensive heart and renal disease with renal failure I13.2 hypertensive heart and renal disease with both (congestive) heart failure and renal failure I13.9 "hypertensive heart and renal disease, unspecified" I15 secondary hypertension I15.0 renovascular hypertension I15.1 hypertension secondary to other renal disorders I15.2 hypertension secondary to endocrine disorders I15.8 other secondary hypertension I15.9 "secondary hypertension, unspecified" I67.4 hypertensive encephalopathy