Primary pulmonary hypertension

**Inclusion terms:** - Heritable pulmonary arterial hypertension - Idiopathic pulmonary arterial hypertension - Primary group 1 pulmonary hypertension - Primary pulmonary arterial hypertension

**Excludes1:** - persistent pulmonary hypertension of newborn (P29.30) - pulmonary hypertension NOS (I27.20) - secondary pulmonary arterial hypertension (I27.21) - secondary pulmonary hypertension (I27.29)