ICD-10 Code H18.043 – Kayser-Fleischer ring, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.043 – Kayser-Fleischer ring, bilateral
What it is
H18.043 identifies Kayser-Fleischer rings in both eyes. These are corneal copper deposits seen as a brownish or greenish ring near the corneal edge.
Clinical signs
Findings typically include bilateral corneal rings visible on slit-lamp examination. Clinical features vary; refer to documentation for the underlying cause and whether neurologic or hepatic findings are present.
When to use this code
Use H18.043 when the provider documents Kayser-Fleischer rings in both eyes, with or without an associated systemic diagnosis. It is appropriate when the chart clearly states bilateral corneal copper deposition. If laterality is not documented, check documentation.
Do not use for
Do not use this code for a unilateral Kayser-Fleischer ring or for vague corneal discoloration without confirmation. Do not assign it when the finding is only suspected or not documented by the clinician.
Coding tip
Confirm both laterality and the exact wording of the eye finding before coding.