Deep vascularization of cornea, unspecified eye

This code describes the presence of abnormal, deep blood vessel growth into the corneal tissue, indicating a significant and often chronic corneal pathology. This vascularization can impair vision by causing corneal opacification and can be a sign of severe inflammation or injury. The "unspecified eye" designation means the laterality of the condition is not documented.

Use this code when documentation clearly indicates deep vascularization of the cornea without specifying whether it affects the right or left eye. This condition is often associated with chronic keratitis, corneal ulcers, or contact lens-induced hypoxia. Supporting documentation should include ophthalmologist notes detailing the depth and presence of corneal neovascularization.

• Avoid using this code if the laterality (right or left eye) is documented; instead, choose the more specific H16.441 or H16.442.
• This code should be sequenced as a primary diagnosis when the deep vascularization is the main reason for the encounter, or as a secondary diagnosis if it's a complication of another corneal condition.
• Ensure documentation specifies "deep" vascularization; superficial vascularization is coded differently (H16.43-).