ICD-10 Code H16.02 – Ring corneal ulcer (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.02 – Ring corneal ulcer
What it is
Ring corneal ulcer is a corneal ulcer with a ring-shaped infiltrate or lesion. Use this code when the documentation specifically identifies the ulcer as ring-shaped.
Clinical signs
Typical findings include a corneal ulcer with a circular, ring-like appearance and associated corneal opacity or inflammation. Clinical features vary; refer to documentation.
When to use this code
Use H16.02 when the clinician documents a ring corneal ulcer or a corneal ulcer described as ring-shaped. You may also use it when the diagnosis is confirmed in an ophthalmology note or discharge summary. If the record only says “corneal ulcer” without the ring description, check documentation.
Do not use for
Do not use this code for nonspecific corneal ulcers, corneal abrasions, or other corneal disorders without a ring-shaped ulcer description. Check documentation if the lesion type is unclear.
Coding tip
Code the most specific corneal ulcer term documented; the “ring” qualifier is essential for H16.02.