ICD-10 Code I27.8 – Other specified pulmonary heart diseases (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I27.8 – Other specified pulmonary heart diseases
What it is
I27.8 identifies pulmonary heart disease that does not fit a more specific ICD-10 category. Use it for right heart strain or disease related to pulmonary vascular or lung conditions when the record supports this broader, specified diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Records may describe right-sided cardiac enlargement, cor pulmonale, or signs of pulmonary hypertension associated with chronic lung or vascular disease.
When to use this code
Use I27.8 when the provider documents a specific pulmonary heart disease that is not otherwise classified. It is appropriate when the note clearly supports pulmonary origin of right heart involvement, but no more exact code applies. Check documentation if the cause or subtype is unclear.
Do not use for
Do not use this code for primary pulmonary hypertension, chronic thromboembolic disease, or other separately classified pulmonary vascular disorders. If the record names a more specific diagnosis, code that instead.
Coding tip
Confirm the provider links the right heart condition to the pulmonary disorder before assigning I27.8.