ICD-10 Code H33.321 – Round hole, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H33.321 – Round hole, right eye
What it is
H33.321 identifies a round retinal hole in the right eye. It means a full-thickness defect in the retina, located on the right side, and documented as a round hole rather than another retinal lesion.
Clinical signs
Findings may include an asymptomatic peripheral retinal hole or symptoms of flashes, floaters, or blurred vision if associated vitreoretinal traction occurs. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents a round hole in the retina of the right eye. It is appropriate for ophthalmology notes, retinal exam findings, or problem lists that clearly specify laterality and lesion type. If the record only says “retinal hole,” check documentation.
Do not use for
Do not use this code for left eye, bilateral, or unspecified retinal holes. It is also not the correct choice for retinal detachment, lattice degeneration, or other retinal breaks unless a round hole is specifically documented.
Coding tip
Verify both the lesion type and right-eye laterality in the chart before assigning H33.321.