H33.321 Round hole, right eye

Billable ICD-10-CM code, FY2026.

Applies from H33 Retinal detachments and breaks

Excludes1 (never code together)

• detachment of retinal pigment epithelium (H35.72-, H35.73-)

Applies from H33.3 Retinal breaks without detachment

Excludes1 (never code together)

• chorioretinal scars after surgery for detachment (H59.81-)

Excludes2 (not included here)

• peripheral retinal degeneration without break (H35.4-)

MS-DRG index

Defines the logic of DRG(s) 124-125 in MDC 02.

Approximate ICD-9-CM (GEMs)

• 361.31 Round hole of retina without detachment (approximate)

Code annotations containing back-references to H33.321

Back-references to H33.3

• Type 2 Excludes: H35.4 Peripheral retinal degeneration ("peripheral retinal degeneration with retinal break (H33.3-)")

Back-references to H33

• Use Additional: H44.2C Degenerative myopia with retinal detachment ("code to identify the retinal detachment (H33.-)")

Nearby codes

• H33.311 Horseshoe tear of retina without detachment, right eye
• H33.312 Horseshoe tear of retina without detachment, left eye
• H33.313 Horseshoe tear of retina without detachment, bilateral
• H33.319 Horseshoe tear of retina without detachment, unspecified eye
• H33.32 Round hole of retina without detachment
• H33.321 Round hole, right eye (this code)
• H33.322 Round hole, left eye
• H33.323 Round hole, bilateral
• H33.329 Round hole, unspecified eye
• H33.33 Multiple defects of retina without detachment
• H33.331 Multiple defects of retina without detachment, right eye