ICD-10 Code H18.2 – Other and unspecified corneal edema (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.2 – Other and unspecified corneal edema
What it is
H18.2 identifies corneal swelling when the record does not specify a more precise corneal disorder. The cornea becomes thickened by fluid, which can blur vision and affect clarity.
Clinical signs
Findings may include corneal haze, blurred vision, and reduced transparency on eye examination. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents corneal edema, corneal swelling, or unspecified edema of the cornea without a more specific diagnosis. It also fits cases where the chart does not identify the underlying cause or laterality. Check documentation if another corneal condition is named.
Do not use for
Do not use H18.2 if the record specifies a different corneal disorder, such as corneal dystrophy, ulcer, or scar. Do not use it for edema clearly documented as part of a separate eye condition unless the provider links it to the cornea.
Coding tip
Code the most specific corneal diagnosis available, and query for cause or laterality when the note is unclear.