ICD-10 Code H25.012 – Cortical age-related cataract, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H25.012 – Cortical age-related cataract, left eye
What it is
This code identifies an age-related cataract affecting the cortex of the lens in the left eye. Use it when the record specifically documents cortical cataract and laterality is left.
Clinical signs
Common findings include gradual blurred vision, glare, and reduced contrast sensitivity. Clinical features vary; refer to documentation, and confirm that the cataract is described as cortical and limited to the left eye.
When to use this code
Use H25.012 when the provider documents a cortical age-related cataract in the left eye, even if symptoms are mild. It is appropriate for ophthalmology assessments, preoperative evaluations, or follow-up visits when the diagnosis remains active. If laterality is not stated, check documentation.
Do not use for
Do not use this code for cataracts in the right eye, bilateral cataracts, or non-age-related cataracts. Also avoid it when the note only says “cataract” without confirming cortical type and left-sided laterality.
Coding tip
Verify both morphology and laterality in the assessment, since missing either detail can lead to an incorrect cataract code.