Ulcerative blepharitis left eye, unspecified eyelid

This code signifies an inflammatory condition of the eyelid margin, specifically the left eye, characterized by ulceration. It indicates a chronic form of blepharitis where there is a breakdown of the skin and tissue along the lid margin. The specific eyelid (upper or lower) is not documented.

Assign this code when documentation specifies ulcerative blepharitis affecting the left eye, and the physician does not specify whether it is the upper or lower eyelid. This typically occurs when the ulceration is diffuse or the exact location isn't clearly identified in the clinical notes.

• Ensure the documentation explicitly states "ulcerative" blepharitis, not just general blepharitis.
• Verify the laterality is specified as "left eye"; if right or bilateral, a different code is required.
• If the specific eyelid (upper or lower) is documented, a more precise code should be selected.