ICD-10 Code H18.00 – Unspecified corneal deposit (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.00 – Unspecified corneal deposit
What it is
This code identifies a corneal deposit when the record does not specify the type or cause. It tells you the provider documented material in the cornea, but not a more precise diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Commonly, corneal deposits may be seen on eye examination as opacity, spots, or other visible material in the cornea.
When to use this code
Use H18.00 when the chart states corneal deposit, corneal opacity from deposit, or similar wording without further detail. It is appropriate when the provider has not identified a specific deposit type or underlying condition.
Choose this code only when the documentation supports a corneal deposit and no more specific ICD-10-CM code is available. Check documentation if the note suggests a different corneal disorder.
Do not use for
Do not use this code for clearly specified corneal disorders, such as dystrophy, ulcer, or scar, unless the record also documents a deposit. Do not use when the diagnosis is only suspected.
Coding tip
If the provider names the deposit type or cause, code that more specific diagnosis instead of H18.00.