Deep vascularization of cornea, bilateral

This code signifies the presence of new blood vessel growth deep within the corneal stroma, affecting both eyes. This vascularization can impair corneal transparency and vision, often indicating a chronic or severe underlying corneal pathology.

Apply this code when documentation explicitly states "deep vascularization of cornea" and specifies involvement of both eyes. This condition is frequently seen in chronic inflammatory conditions, severe infections, or after significant corneal trauma or surgery.

• Ensure the documentation clearly distinguishes between superficial and deep vascularization.
• Confirm bilateral involvement; if unilateral, a different code (H16.441 or H16.442) would be appropriate.
• Always code the underlying cause of the corneal vascularization, if known and documented, as a primary or secondary diagnosis.