Pulmonary heart disease, unspecified

This code represents a form of heart disease that develops secondary to a primary lung disorder, without further specification of the underlying cause or type. It indicates a cardiac condition directly resulting from pulmonary hypertension or other chronic lung conditions affecting the right side of the heart.

Use this code when documentation clearly states "pulmonary heart disease" or "cor pulmonale" but lacks specific details regarding the etiology (e.g., chronic obstructive pulmonary disease, pulmonary embolism). It is appropriate when the physician has not identified or documented the specific lung disease causing the cardiac involvement.

• Avoid using this code if a more specific code for cor pulmonale due to a specified lung disease (e.g., I27.1, I27.81) can be assigned.
• Always query the provider for clarification if the underlying pulmonary condition is known but not explicitly linked to the pulmonary heart disease.
• This code should be sequenced after the primary pulmonary condition if that condition is documented and known to be the cause.