Stenosis of coronary artery stent, initial encounter

This code signifies a narrowing or obstruction within a previously placed coronary artery stent. It indicates a complication where the stent, designed to keep the artery open, has itself become stenosed, impeding blood flow to the heart muscle. This can lead to symptoms of angina or myocardial ischemia.

Use this code for patients presenting with symptoms or objective evidence of a new or worsening stenosis within an existing coronary stent. This applies to the initial diagnosis and treatment of such a complication. It is appropriate when the patient is first seen for this specific issue, regardless of prior stent placement history.

• Ensure documentation clearly specifies "stenosis of coronary artery stent" rather than just general coronary artery disease.
• Verify the encounter is the "initial encounter" for this specific complication; subsequent encounters would use a different seventh character.
• Distinguish from restenosis of the native coronary artery adjacent to a stent, which would be coded differently.