ICD-10 Code H18.552 – Macular corneal dystrophy, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.552 – Macular corneal dystrophy, left eye
What it is
This code identifies macular corneal dystrophy affecting the left eye. It is a corneal disorder that causes progressive clouding of the cornea and can reduce vision.
Clinical signs
Typical findings include bilateral or unilateral corneal haze, stromal opacities, and decreased visual acuity. Clinical features vary; refer to documentation.
When to use this code
Use H18.552 when the provider documents macular corneal dystrophy in the left eye specifically. It may also apply when the left eye is the only eye documented with the condition, even if the disease is present elsewhere only by history. Check documentation if laterality is unclear.
Do not use for
Do not use this code for nonspecific corneal opacity, other corneal dystrophies, or right-eye disease. If the record does not confirm macular corneal dystrophy of the left eye, check documentation.
Coding tip
Verify laterality and the exact dystrophy type in the assessment, not just the problem list.