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2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Circulatory System 390-459 > Diseases Of Pulmonary Circulation 415-417 > Chronic Pulmonary Heart Disease 416.* > 2008 ICD-9-CM Diagnosis 416.0 Primary pulmonary hypertension  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 416.0 can be accessed here. Increased VASCULAR RESISTANCE in the PULMONARY CIRCULATION, usually secondary to HEART DISEASES or LUNG DISEASES. 416.0 is a specific code that can be used to specify a diagnosis 416.0 contains 16 index entries View the ICD-9-CM Volume 1 416.* hierarchy 416.0 also known as: Idiopathic pulmonary arteriosclerosis Pulmonary hypertension (essential) (idiopathic) (primary) Index entries containing 416.0: Arrillaga-Ayerza syndrome (pulmonary artery sclerosis with pulmonary hypertension) 416.0 Arteriosclerosis, arteriosclerotic (artery) (deformans) (diffuse) (disease) (endarteritis) (general) (obliterans) (obliterative) (occlusive) (senile) (with calcification) 440.9 pulmonary (idiopathic) 416.0 Ayerza's disease or syndrome (pulmonary artery sclerosis with pulmonary hypertension) 416.0 Cardiopathia nigra 416.0 Disease, diseased - see also Syndrome Ayerza's (pulmonary artery sclerosis with pulmonary hypertension) 416.0 heart (organic) 429.9 black 416.0 pulmonary - see also Disease, lung hypertensive (vascular) 416.0 cardiovascular 416.0 Hypertension, hypertensive (arterial) (arteriolar) (crisis) (degeneration) (disease) (essential) (fluctuating) (idiopathic) (intermittent) (labile) (low renin) (orthostatic) (paroxysmal) (primary) (systemic) (uncontrolled) (vascular) 401.0 401.1 401.9 lesser circulation - - 416.0 pulmonary (artery) - - 416.8 idiopathic 416.0 primary 416.0 of newborn 747.83 Sclerosis, sclerotic pulmonary (see also Fibrosis, lung) 515 artery 416.0 Syndrome - see also Disease Arrillaga-Ayerza (pulmonary artery sclerosis with pulmonary hypertension) 416.0 Ayerza (-Arrillaga) (pulmonary artery sclerosis with pulmonary hypertension) 416.0 cardiacos negros 416.0 pulmonary arteriosclerosis 416.0