I27 | 
		 | 
		Other pulmonary heart diseases   | 
	
 |  | 
	
		 I27.0 | 
		  | 
		Primary pulmonary hypertension | 
	 
	
		 |  | 
		
| 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)
  | 
	 
 
 | 
	   | 
 |  | 
	
		 I27.1 | 
		 | 
		Kyphoscoliotic heart disease | 
	 
  | 
 |  | 
	
		 I27.2 | 
		  | 
		Other secondary pulmonary hypertension | 
	 
	
		 |  | 
		
	
		| CodeAlso | 
		associated underlying condition
  | 
	 
	
		| Excludes1 | 
		Eisenmenger's syndrome (I27.83)
  | 
	 
 
 | 
	  |  | 
	
		 I27.20 | 
		  | 
		Pulmonary hypertension, unspecified | 
	 
	
		 |  | 
		
| Pulmonary hypertension NOS |   
 | 
	   |   |  | 
	
		 I27.21 | 
		  | 
		Secondary pulmonary arterial hypertension | 
	 
	
		 |  | 
		
| (Associated) (drug-induced) (toxin-induced) pulmonary arterial hypertension NOS |  | (Associated) (drug-induced) (toxin-induced) (secondary) group 1 pulmonary hypertension |  	
		| CodeAlso | 
		associated conditions if applicable, or adverse effects of drugs or toxins, such as: adverse effect of appetite depressants (T50.5X5) congenital heart disease (Q20-Q28) human immunodeficiency virus [HIV] disease (B20) polymyositis (M33.2-) portal hypertension (K76.6) rheumatoid arthritis (M05.-) schistosomiasis (B65.-) Sjögren syndrome (M35.0-) systemic sclerosis (M34.-)
  | 
	 
 
 | 
	   |   |  | 
	
		 I27.22 | 
		  | 
		Pulmonary hypertension due to left heart disease | 
	 
	
		 |  | 
		
| Group 2 pulmonary hypertension |  	
		| CodeAlso | 
		associated left heart disease, if known, such as: multiple valve disease (I08.-) rheumatic mitral valve diseases (I05.-) rheumatic aortic valve diseases (I06.-)
  | 
	 
 
 | 
	   |   |  | 
	
		 I27.23 | 
		  | 
		Pulmonary hypertension due to lung diseases and hypoxia | 
	 
	
		 |  | 
		
| Group 3 pulmonary hypertension |  	
		| CodeAlso | 
		associated lung disease, if known, such as: bronchiectasis (J47.-) cystic fibrosis with pulmonary manifestations (E84.0) interstitial lung disease (J84.-) pleural effusion (J90) sleep apnea (G47.3-)
  | 
	 
 
 | 
	   |   |  | 
	
		 I27.24 | 
		  | 
		Chronic thromboembolic pulmonary hypertension | 
	 
	
		 |  | 
		
| Group 4 pulmonary hypertension |  	
		| CodeAlso | 
		associated pulmonary embolism, if applicable (I26.-, I27.82)
  | 
	 
 
 | 
	   |   |  | 
	
		 I27.29 | 
		  | 
		Other secondary pulmonary hypertension | 
	 
	
		 |  | 
		
| Group 5 pulmonary hypertension |  | Pulmonary hypertension with unclear multifactorial mechanisms |  | Pulmonary hypertension due to hematologic disorders |  | Pulmonary hypertension due to metabolic disorders |  | Pulmonary hypertension due to other systemic disorders |  	
		| CodeAlso | 
		other associated disorders, if known, such as: chronic myeloid leukemia (C92.10-C92.22) essential thrombocythemia (D47.3) Gaucher disease (E75.22) hypertensive chronic kidney disease with end stage renal disease (I12.0, I13.11, I13.2) hyperthyroidism (E05.-) hypothyroidism (E00-E03) polycythemia vera (D45) sarcoidosis (D86.-)
  | 
	 
 
 | 
	   |    | 
 |  | 
	
		 I27.8 | 
		 | 
		Other specified pulmonary heart diseases | 
	 
 |  | 
	
		 I27.81 | 
		  | 
		Cor pulmonale (chronic) | 
	 
	
		 |  | 
		
| Cor pulmonale NOS |  	
		| CodeAlso | 
		, if applicable, right heart failure (I50.81-)
  | 
	 
	
		| Excludes1 | 
		acute cor pulmonale (I26.0-)
  | 
	 
 
 | 
	   |   |  | 
	
		 I27.82 | 
		  | 
		Chronic pulmonary embolism | 
	 
	
		 |  | 
		
	
		| UseAdditionalCode | 
		code, if applicable, for associated long-term (current) use of anticoagulants (Z79.01)
  | 
	 
	
		| Excludes1 | 
		personal history of pulmonary embolism (Z86.711)
  | 
	 
 
 | 
	   |   |  | 
	
		 I27.83 | 
		  | 
		Eisenmenger's syndrome | 
	 
	
		 |  | 
		
| Eisenmenger's complex |  | (Irreversible) Eisenmenger's disease |  | Pulmonary hypertension with right to left shunt related to congenital heart disease |  	
		| CodeAlso | 
		underlying heart defect, if known, such as: atrial septal defect (Q21.1-) Eisenmenger's defect (Q21.8) patent ductus arteriosus (Q25.0) ventricular septal defect (Q21.0)
  | 
	 
 
 | 
	   |   |  | 
	
		 I27.84 | 
		 | 
		Fontan related circulation | 
	 
 |  | 
	
		 I27.840 | 
		 | 
		Fontan-associated liver disease [FALD] | 
	 
  |   |  | 
	
		 I27.841 | 
		  | 
		Fontan-associated lymphatic dysfunction | 
	 
	
		 |  | 
		
	
		| CodeAlso | 
		associated conditions such as: chylothorax (J94.0) Fontan associated protein-losing enteropathy (K90.89) plastic (obstructive) bronchitis (J44.89)
  | 
	 
 
 | 
	   |   |  | 
	
		 I27.848 | 
		  | 
		Other Fontan-associated condition | 
	 
	
		 |  | 
		
	
		| UseAdditionalCode | 
		code to specify the Fontan associated condition
  | 
	 
 
 | 
	   |   |  | 
	
		 I27.849 | 
		 | 
		Fontan related circulation, unspecified | 
	 
  |    |   |  | 
	
		 I27.89 | 
		 | 
		Other specified pulmonary heart diseases | 
	 
  |    | 
 |  | 
	
		 I27.9 | 
		  | 
		Pulmonary heart disease, unspecified | 
	 
	
		 |  | 
		
| Chronic cardiopulmonary disease |   
 | 
	   |