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I27.21 Secondary pulmonary arterial hypertension

Back I27Other pulmonary heart diseasesCategory5 →I27.0Primary pulmonary hypertensionCategory I27.1Kyphoscoliotic heart diseaseCategory I27.2Other secondary pulmonary hypertensionCategory6 →I27.20Pulmonary hypertension, unspecifiedCategory I27.21Secondary pulmonary arterial hypertensionCategory I27.22Pulmonary hypertension due to left heart diseaseCategory I27.23Pulmonary hypertension due to lung diseases and hypoxiaCategory I27.24Chronic thromboembolic pulmonary hypertensionCategory I27.29Other secondary pulmonary hypertensionCategory I27.8Other specified pulmonary heart diseasesCategory5 →I27.81Cor pulmonale (chronic)Category I27.82Chronic pulmonary embolismCategory I27.83Eisenmenger's syndromeCategory I27.84Fontan related circulationCategory4 →I27.840Fontan-associated liver disease [FALD]Category I27.841Fontan-associated lymphatic dysfunctionCategory I27.848Other Fontan-associated conditionCategory I27.849Fontan related circulation, unspecifiedCategory I27.89Other specified pulmonary heart diseasesCategory I27.9Pulmonary heart disease, unspecifiedCategory

CategoryCODABLE

I27.21

Secondary pulmonary arterial hypertension

EXAMPLES

(Associated) (drug-induced) (toxin-induced) pulmonary arterial hypertension NOS
(Associated) (drug-induced) (toxin-induced) (secondary) group 1 pulmonary hypertension

CODING RULE

Code also: 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.-)

Chapter: IX · Diseases of the circulatory system
Section: I26-I28
Valid from

Source

CMS ICD-10-CM Tabular List, edition FY2026.

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