ICD-10 Code H18.89 – Other specified disorders of cornea (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.89 – Other specified disorders of cornea
What it is
H18.89 identifies a corneal disorder that is documented but does not fit a more specific ICD-10-CM cornea code. Use it when the record names a distinct corneal condition and no better option is available.
Clinical signs
Clinical features vary; refer to documentation. Corneal disorders may present with pain, redness, foreign-body sensation, blurred vision, or visible corneal opacity, but the exact findings depend on the condition recorded.
When to use this code
Use H18.89 when the clinician documents an unspecified-by-category corneal disorder that is still more precise than “unspecified corneal disorder.” It is appropriate when the note names a corneal abnormality but does not provide enough detail for a more specific code. Check documentation for laterality and any linked diagnosis.
Do not use for
Do not use this code when the chart supports a specific corneal diagnosis with its own ICD-10-CM code. If the documentation only says “corneal disorder” without further detail, check documentation for a more appropriate unspecified code.
Coding tip
Assign H18.89 only after you confirm the provider documented a distinct corneal disorder that is not captured elsewhere.