ICD-10-CM 2027
ICD-10 code for optic nerve atrophy
From the official ICD-10-CM alphabetic index entry “Atrophy, atrophic (of) › optic (nerve)”. Page updated September 29, 2026.
About coding optic nerve atrophy
The ICD-10-CM code for optic nerve atrophy is H47.20 (Unspecified optic atrophy). The official index lists 6 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on H47.20.
Within H47.2, choose H47.20 (Unspecified optic atrophy) only when documentation doesn't support a more specific option: primary optic atrophy (H47.21), hereditary optic atrophy (H47.22), glaucomatous optic atrophy (H47.23) and other optic atrophy (H47.29).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 123 (Neurological Eye Disorders, relative weight 0.822), in MDC 02 (Diseases and Disorders of the Eye), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific optic nerve atrophy codes (official index)
Common questions about optic nerve atrophy ICD-10 codes
What is the ICD-10 code for optic nerve atrophy?
- H47.20 — Unspecified optic atrophy. More specific codes apply when the documentation supports them: H47.23, H47.22, H47.21, H47.29 and others below.
What is the ICD-10 code for glaucomatous optic nerve atrophy?
- H47.23 — Glaucomatous optic atrophy (header code; choose a more specific subcode).
What is the ICD-10 code for hereditary optic nerve atrophy?
- H47.22 — Hereditary optic atrophy.
What is the ICD-10 code for primary optic nerve atrophy?
- H47.21 — Primary optic atrophy (header code; choose a more specific subcode).
What is the ICD-10 code for syphilitic optic nerve atrophy?
- A52.15 — Late syphilitic neuropathy.
Is H47.20 billable?
- Yes. H47.20 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can H47.20 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict H47.20 as a principal diagnosis.
Is H47.20 a CC or MCC?
- No. H47.20 is neither a CC nor an MCC under MS-DRG v44.0.