ICD-10 Code H18.8 – Other specified disorders of cornea (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.8 – Other specified disorders of cornea
What it is
H18.8 is used for corneal disorders that are identified, but do not fit a more specific ICD-10-CM cornea code. It covers other named corneal conditions when documentation supports the diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Findings may include corneal opacity, irregularity, edema, or other structural corneal changes noted on eye examination.
When to use this code
Use this code when the provider documents a specific corneal disorder that is not classified elsewhere in the cornea chapter. It is appropriate when the record clearly identifies the condition, but no more exact code is available.
If the diagnosis is nonspecific, or the chart only says “corneal disorder” without further detail, check documentation before assigning H18.8. You should also confirm that another corneal code does not better match the documented condition.
Do not use for
Do not use H18.8 for corneal conditions that have their own more specific code. Do not assign it when documentation is insufficient or when the disorder is outside the cornea.
Coding tip
Code H18.8 only after confirming the provider’s exact corneal diagnosis and ruling out a more specific ICD-10-CM option.