H32 Chorioretinal disorders in diseases classified elsewhere

Billable ICD-10-CM code, FY2026.

Excludes1 (never code together)

• chorioretinitis (in):
• toxoplasmosis (acquired) (B58.01)
• tuberculosis (A18.53)

Code first

• underlying disease, such as:
• congenital toxoplasmosis (P37.1)
• histoplasmosis (B39.-)
• leprosy (A30.-)

Applies from H32 Chorioretinal disorders in diseases classified elsewhere

Excludes1 (never code together)

• chorioretinitis (in):
• toxoplasmosis (acquired) (B58.01)
• tuberculosis (A18.53)

Code first

• underlying disease, such as:
• congenital toxoplasmosis (P37.1)
• histoplasmosis (B39.-)
• leprosy (A30.-)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 363.8 Other disorders of choroid (approximate)

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

• Manifestation codes as principal diagnosis: Manifestation codes describe the manifestation of an underlying disease, not the disease itself, and are not allowed as principal diagnosis.

Code annotations containing back-references to H32

Back-references to H32

• Use Additional: B39 Histoplasmosis ("retinitis (H32)")

Back-references to H32

• Use Additional: B39 Histoplasmosis ("retinitis (H32)")

Diagnosis Index entries for H32

• Chorioretinitis › histoplasmic
• Chorioretinitis › in (due to) › histoplasmosis
• Chorioretinitis › in (due to) › toxoplasmosis (acquired) › congenital (active)
• Chorioretinitis › leprous
• Chorioretinitis › syphilitic (secondary) › congenital (early)
• Retinitis › albuminurica
• Retinitis › renal
• Retinitis › syphilitic (early) (secondary) › congenital (early)
• Syphilis, syphilitic (acquired) › congenital › chorioretinitis, choroiditis

Nearby codes

• H32 Chorioretinal disorders in diseases classified elsewhere (this code)