Corneal ectasia, right eye

This code signifies a non-inflammatory thinning and bulging of the cornea, specifically affecting the right eye. Corneal ectasia leads to an irregular corneal shape, often resulting in significant visual impairment due to astigmatism and myopia. It can be a primary condition like keratoconus or secondary to refractive surgery.

Apply this code when documentation clearly indicates a diagnosis of corneal ectasia affecting the right eye. This includes conditions such as keratoconus, pellucid marginal degeneration, or post-LASIK ectasia, provided the laterality is specified as right. Supporting documentation should detail the corneal irregularity and its impact on vision.

• Ensure laterality is explicitly documented as "right eye" to avoid unspecified coding.
• Distinguish from corneal degeneration (H18.4-) or corneal scars (H17.-) which have different underlying etiologies.
• Consider co-reporting with codes for associated visual disturbances, such as astigmatism (H52.2-) or myopia (H52.1-), if separately documented and treated.