ICD-10 Code H18.009 – Unspecified corneal deposit, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.009 – Unspecified corneal deposit, unspecified eye
What it is
This code identifies a corneal deposit in an unspecified eye when the record does not state the exact cause, type, or laterality. Use it for a documented corneal deposit that remains nonspecific.
Clinical signs
Clinical features vary; refer to documentation. Commonly, a corneal deposit may appear as a visible opacity or material on the cornea and may be noted on slit-lamp examination.
When to use this code
Use H18.009 when the provider documents a corneal deposit but does not specify which eye or provide a more precise diagnosis. It also fits cases where the deposit is recorded without further detail in the assessment. If the chart later identifies the eye or a specific corneal disorder, code that instead.
Do not use for
Do not use this code when the documentation names a specific corneal condition, such as a dystrophy, ulcer, or foreign body. Check documentation if the deposit is linked to another diagnosed eye disorder.
Coding tip
Query for laterality and the underlying cause before assigning this unspecified code.