I27: Other pulmonary heart diseases
Codes under I27 (Other pulmonary heart diseases). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| I27.0 | Primary pulmonary hypertension | ✓ |
| I27.0 | Primary pulmonary hypertension | ✓ |
| I27.1 | Kyphoscoliotic heart disease | ✓ |
| I27.1 | Kyphoscoliotic heart disease | ✓ |
| I27.2 | Other secondary pulmonary hypertension | — |
| I27.2 | Other secondary pulmonary hypertension | — |
| I27.8 | Other specified pulmonary heart diseases | — |
| I27.8 | Other specified pulmonary heart diseases | — |
| I27.9 | Pulmonary heart disease, unspecified | ✓ |
| I27.9 | Pulmonary heart disease, unspecified | ✓ |
| I27.20 | Pulmonary hypertension, unspecified | ✓ |
| I27.20 | Pulmonary hypertension, unspecified | ✓ |
| I27.21 | Secondary pulmonary arterial hypertension | ✓ |
| I27.21 | Secondary pulmonary arterial hypertension | ✓ |
| I27.22 | Pulmonary hypertension due to left heart disease | ✓ |
| I27.22 | Pulmonary hypertension due to left heart disease | ✓ |
| I27.23 | Pulmonary hypertension due to lung diseases and hypoxia | ✓ |
| I27.23 | Pulmonary hypertension due to lung diseases and hypoxia | ✓ |
| I27.24 | Chronic thromboembolic pulmonary hypertension | ✓ |
| I27.24 | Chronic thromboembolic pulmonary hypertension | ✓ |
| I27.29 | Other secondary pulmonary hypertension | ✓ |
| I27.29 | Other secondary pulmonary hypertension | ✓ |
| I27.81 | Cor pulmonale (chronic) | ✓ |
| I27.81 | Cor pulmonale (chronic) | ✓ |
| I27.82 | Chronic pulmonary embolism | ✓ |
| I27.82 | Chronic pulmonary embolism | ✓ |
| I27.83 | Eisenmenger's syndrome | ✓ |
| I27.83 | Eisenmenger's syndrome | ✓ |
| I27.84 | Fontan related circulation | — |
| I27.84 | Fontan related circulation | — |
| I27.89 | Other specified pulmonary heart diseases | ✓ |
| I27.89 | Other specified pulmonary heart diseases | ✓ |
| I27.840 | Fontan-associated liver disease [FALD] | ✓ |
| I27.840 | Fontan-associated liver disease [FALD] | ✓ |
| I27.841 | Fontan-associated lymphatic dysfunction | ✓ |
| I27.841 | Fontan-associated lymphatic dysfunction | ✓ |
| I27.848 | Other Fontan-associated condition | ✓ |
| I27.848 | Other Fontan-associated condition | ✓ |
| I27.849 | Fontan related circulation, unspecified | ✓ |
| I27.849 | Fontan related circulation, unspecified | ✓ |
Frequently asked questions
What is ICD-10-CM code I27?
I27 is an ICD-10-CM category covering Other pulmonary heart diseases. It contains 40 more specific diagnosis codes, 34 of which are billable.
Is I27 a billable code?
No — I27 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example I27.0 — Primary pulmonary hypertension). 34 of the 40 codes under I27 are billable.
What codes fall under I27?
I27 includes I27.0, I27.0, I27.1, I27.1, I27.2, plus 35 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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