H33.20 Serous retinal detachment, unspecified eye

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from H33 Retinal detachments and breaks

Excludes1 (never code together)

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

Applies from H33.2 Serous retinal detachment

Applicable to

• Retinal detachment NOS
• Retinal detachment without retinal break

Excludes1 (never code together)

• central serous chorioretinopathy (H35.71-)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 361.2 Serous retinal detachment (approximate)

Medicare Code Edits (MCE v43.1 (April 2026))

• Unspecified code (laterality): Unspecified codes for which a more specific code identifying laterality (right, left, bilateral) exists within the same code family.

Code annotations containing back-references to H33.20

Back-references to H33.2

• Type 1 Excludes: H33.0 Retinal detachment with retinal break ("serous retinal detachment (without retinal break) (H33.2-)")
• Type 1 Excludes: H35.7 Separation of retinal layers ("retinal detachment (serous) (H33.2-)")

Back-references to H33

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

Nearby codes

• H33.191 Other retinoschisis and retinal cysts, right eye
• H33.192 Other retinoschisis and retinal cysts, left eye
• H33.193 Other retinoschisis and retinal cysts, bilateral
• H33.199 Other retinoschisis and retinal cysts, unspecified eye
• H33.2 Serous retinal detachment
• H33.20 Serous retinal detachment, unspecified eye (this code)
• H33.21 Serous retinal detachment, right eye
• H33.22 Serous retinal detachment, left eye
• H33.23 Serous retinal detachment, bilateral
• H33.3 Retinal breaks without detachment
• H33.30 Unspecified retinal break