ICD-10 Code I28 – Other diseases of pulmonary vessels (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I28 – Other diseases of pulmonary vessels
What it is
I28 identifies other disorders affecting the pulmonary vessels, the blood vessels that carry blood between the heart and lungs. Use it when documentation names a pulmonary vascular condition that is not classified elsewhere.
Clinical signs
Clinical features vary; refer to documentation. Patients may have findings related to impaired pulmonary blood flow or pressure, but the exact presentation depends on the specific vascular disorder recorded.
When to use this code
Use I28 when the provider documents a pulmonary vessel disease that does not fit a more specific ICD-10-CM code. It is appropriate for nonspecific or residual pulmonary vascular conditions after you review the chart. If the record names a more precise diagnosis, code that condition instead.
Do not use for
Do not use I28 for pulmonary embolism, pulmonary hypertension, or other specifically coded cardiopulmonary disorders. Check documentation if the note describes a more exact vascular diagnosis.
Coding tip
Code I28 only after confirming the pulmonary vascular condition is documented and no more specific code applies.