ICD-10 Code H18.041 – Kayser-Fleischer ring, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.041 – Kayser-Fleischer ring, right eye
What it is
Use this code for a Kayser-Fleischer ring identified in the right eye. It refers to a corneal copper deposition seen as a brownish or greenish ring at the corneal margin.
Clinical signs
Typical findings include a peripheral corneal ring on slit-lamp exam, usually most visible in the superior and inferior cornea. Clinical features vary; refer to documentation.
When to use this code
Assign H18.041 when the provider documents a Kayser-Fleischer ring specifically in the right eye. Use it for confirmed ocular findings, whether noted during screening, consultation, or evaluation for an underlying disorder. If laterality is not stated, check documentation before coding.
Do not use for
Do not use this code for a left-eye or bilateral ring, or when the finding is documented only as unspecified eye. Do not code it for other corneal discolorations unless Kayser-Fleischer ring is specifically recorded.
Coding tip
Verify laterality in the ophthalmology note; the code is eye-specific and should match the documented side.