Lattice degeneration of retina, bilateral

This code describes a bilateral thinning and degeneration of the peripheral retina, characterized by a lattice-like pattern of crisscrossing lines. This condition predisposes individuals to retinal tears and detachments due to vitreous traction.

Use this code when documentation explicitly states "lattice degeneration of retina, bilateral." This diagnosis is typically made during a dilated funduscopic examination. Supporting documentation should include findings of peripheral retinal thinning with characteristic lattice lesions in both eyes.

• Ensure documentation specifies involvement of both eyes; otherwise, use the appropriate unilateral code (H35.411 or H35.412).
• Do not confuse with other retinal degenerations like paving-stone degeneration (H35.42-) or retinoschisis (H35.7-).
• If a retinal detachment or tear is also present, code the detachment/tear first, followed by this code as a contributing factor.