2027 ICD-10-CM Diagnosis Code H47.20Unspecified optic atrophy

ICD-10-CM Codes›H00–H59›H46-H47›H47

ICD-10-CM H47.20
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

H47.20 is a billable ICD-10-CM diagnosis code for unspecified optic atrophy. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 123. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neuro-ophthalmology.

Code Identity

ICD-10-CM Code
H47.20
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified optic atrophy
Short Description
Unspecified optic atrophy
Same as the full description in the CMS dataset.
Parent Code
H47.2
Optic atrophy

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH46-H47Disorders of optic nerve and visual pathways
CategoryH47Other disorders of optic [2nd] nerve and visual pathways
This CodeH47.20Unspecified optic atrophy

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Atrophy of fundus of eye
  • Atrophy of optic disc
  • Atrophy of sector of optic disc
  • Bilateral optic atrophy of eyes
  • Complete optic atrophy
  • Early onset cerebellar ataxia with retinitis pigmentosa and optic atrophy
  • Optic atrophy
  • Optic atrophy of left eye
  • Optic atrophy of right eye
  • Optic atrophy secondary to retinal disease
  • Progressive encephalopathy with edema, hypsarrhythmia and optic atrophy syndrome
  • Progressive encephalopathy with edema, hypsarrhythmia, and optic atrophy-like syndrome
  • Retrobulbar optic nerve atrophy
  • Second cranial nerve finding

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to H47.20: its own notes plus those printed at Chapter 7. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 7 (H00-H59) Diseases of the eye and adnexa applies to 2,677 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury (trauma) of eye and orbit (S05.-)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)

Notes

General instructions on how these codes are used.

From Chapter 7 (H00-H59) Diseases of the eye and adnexa applies to 2,677 codes
  • Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR EYE006
Neuro-ophthalmology
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Optic Atrophy

    atrophy of the optic disk which may be congenital or acquired. this condition indicates a deficiency in the number of nerve fibers which arise in the retina and converge to form the optic disk; optic nerve; optic chiasm; and optic tracts. glaucoma; ischemia; inflammation, a chronic elevation of intracranial pressure, toxins, optic nerve compression, and inherited conditions (see optic atrophies, hereditary) are relatively common causes of this condition.

Patient EducationClinical

Optic Nerve Disorders

The optic nerve is a bundle of more than 1 million nerve fibers that carry visual messages. You have one connecting the back of each eye (your retina) to your brain. Damage to an optic nerve can cause vision loss. The type of vision loss and how severe it is depends on where the damage occurs. It may affect one or both eyes.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert H47.20 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
377.10 Optic atrophy NOS
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About H47.20Overview

What is the ICD-10 code for unspecified optic atrophy?

The ICD-10-CM code for unspecified optic atrophy is H47.20 (sometimes written as H4720). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is H47.20 (Optic atrophy) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report unspecified optic atrophy on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does H47.20 group to?

When unspecified optic atrophy is the principal diagnosis on an inpatient stay, it groups to MS-DRG 123 (neurological Eye Disorders), which carries a relative weight of 0.8218. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of H47.20?

Under the General Equivalence Mappings, unspecified optic atrophy converts to ICD-9-CM 377.10 (optic atrophy NOS). The mapping is a direct match.