ICD-10 Code H18.70 – Unspecified corneal deformity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.70 – Unspecified corneal deformity
What it is
H18.70 identifies a corneal shape abnormality when the record does not specify the exact deformity. Use it for a documented corneal distortion or irregularity without a more precise diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Findings may include an irregular corneal contour on exam or imaging, with associated visual distortion or reduced clarity if noted by the clinician.
When to use this code
Use this code when the provider documents an unspecified corneal deformity and no more specific corneal condition is named. It is appropriate when the chart confirms a deformity but does not describe the exact type.
Choose a more specific code if the documentation identifies keratoconus, corneal ectasia, scar-related distortion, or another defined corneal disorder. If the record is vague, code what is explicitly stated and check documentation.
Do not use for
Do not use H18.70 for a clearly named corneal disease or injury. Also avoid it when the record lacks any mention of deformity; check documentation.
Coding tip
Query for the exact corneal diagnosis whenever possible, because unspecified coding should be reserved for incomplete documentation.