H33.109 Unspecified retinoschisis, unspecified 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 H33.1 Retinoschisis and retinal cysts

Excludes1 (never code together)

• congenital retinoschisis (Q14.1)
• microcystoid degeneration of retina (H35.42-)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 361.10 Retinoschisis, unspecified (approximate)

Code annotations containing back-references to H33.109

Back-references to H33

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

Nearby codes

• H33.1 Retinoschisis and retinal cysts
• H33.10 Unspecified retinoschisis
• H33.101 Unspecified retinoschisis, right eye
• H33.102 Unspecified retinoschisis, left eye
• H33.103 Unspecified retinoschisis, bilateral
• H33.109 Unspecified retinoschisis, unspecified eye (this code)
• H33.11 Cyst of ora serrata
• H33.111 Cyst of ora serrata, right eye
• H33.112 Cyst of ora serrata, left eye
• H33.113 Cyst of ora serrata, bilateral
• H33.119 Cyst of ora serrata, unspecified eye