H31.121 Diffuse secondary atrophy of choroid, right eye

Billable ICD-10-CM code, FY2026.

Applies from H31.1 Choroidal degeneration

Excludes2 (not included here)

• angioid streaks of macula (H35.33)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 362.77 Dystrophies primarily involving Bruch's membrane (approximate)
• 363.42 Diffuse secondary atrophy of choroid (approximate)

Code annotations containing back-references to H31.121

Back-references to H31.1

• Type 1 Excludes: H35.5 Hereditary retinal dystrophy ("dystrophies primarily involving Bruch's membrane (H31.1-)")

Back-references to H31

• Use Additional: H44.2A Degenerative myopia with choroidal neovascularization ("code for any associated choroid disorders (H31.-)")

Nearby codes

• H31.111 Age-related choroidal atrophy, right eye
• H31.112 Age-related choroidal atrophy, left eye
• H31.113 Age-related choroidal atrophy, bilateral
• H31.119 Age-related choroidal atrophy, unspecified eye
• H31.12 Diffuse secondary atrophy of choroid
• H31.121 Diffuse secondary atrophy of choroid, right eye (this code)
• H31.122 Diffuse secondary atrophy of choroid, left eye
• H31.123 Diffuse secondary atrophy of choroid, bilateral
• H31.129 Diffuse secondary atrophy of choroid, unspecified eye
• H31.2 Hereditary choroidal dystrophy
• H31.20 Hereditary choroidal dystrophy, unspecified