Unspecified adhesions of iris, bilateral

This code describes the presence of scar tissue or abnormal attachments involving the iris in both eyes, where the specific type or cause of the adhesion is not documented. These adhesions can restrict pupillary movement and affect vision.

Use this code when documentation indicates bilateral iris adhesions without further specification of their nature (e.g., anterior synechiae, posterior synechiae) or etiology. This code is appropriate when the physician notes "bilateral iris adhesions, unspecified" or similar terminology.

• Ensure documentation explicitly states "bilateral" involvement; otherwise, a unilateral code or an unspecified laterality code may be more appropriate.
• If the specific type of adhesion (e.g., anterior, posterior) is known, a more specific code from the H21.3 or H21.4 subcategories should be used.
• Always look for underlying causes or associated conditions (e.g., inflammation, trauma) that may require additional coding.