ICD-10-CM > I00-I99 > I26-I28 > I27 > I27.2 I27.2 Other secondary pulmonary hypertension Non-Billable/Non-Specific Code Also associated underlying condition Type 1 Excludes Eisenmenger's syndrome (I27.83) Codes I27.20Pulmonary hypertension, unspecifiedI27.21Secondary pulmonary arterial hypertensionI27.22Pulmonary hypertension due to left heart diseaseI27.23Pulmonary hypertension due to lung diseases and hypoxiaI27.24Chronic thromboembolic pulmonary hypertensionI27.29Other secondary pulmonary hypertension