2026 ICD-10-CM Diagnosis Code H47.9Unspecified disorder of visual pathways

ICD-10-CM Codes›H00–H59›H46-H47›H47

ICD-10-CM H47.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H47.9 is a billable ICD-10-CM diagnosis code for unspecified disorder of visual pathways. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as disorder of left visual pathway. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neuro-ophthalmology.

Code Identity

ICD-10-CM Code
H47.9
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified disorder of visual pathways
Short Description
Unspecified disorder of visual pathways
Same as the full description in the CMS dataset.
Parent Code
H47
Other disorders of optic [2nd] nerve and visual pathways

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 CodeH47.9Unspecified disorder of visual pathways

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Disorder of left visual pathway
  • Disorder of optic radiation
  • Disorder of optic tract
  • Disorder of right visual pathway
  • Disorder of visual cortex
  • Disorder of visual pathways

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Disorder(of)
      • visual
        • pathway

Clinical ClassificationClinical

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

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

Patient EducationClinical

Vision Impairment and Blindness

Vision impairment is the loss of vision. It includes blindness, which means that you have lost all or most of your sight. It also includes low vision, which means you have some vision, but the vision loss makes it hard to do everyday activities. You may have trouble reading, shopping, cooking, writing, and watching TV.

The full article covers:

  • What is vision impairment?
  • What causes vision impairment?
  • How is vision impairment diagnosed?
  • What are the types of low vision?
  • What are the treatments for low vision?
  • How can I make the most of my remaining sight?
  • Can vision impairment be prevented?

Read the full article at MedlinePlus

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

Convert H47.9 to ICD-9-CMHistory

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

ICD-9-CM
377.9 Optic nerve disorder NOS
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About H47.9Overview

Is H47.9 (Other disorders of optic [2nd] nerve and visual pathways) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report unspecified disorder of visual pathways on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

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

Under the General Equivalence Mappings, unspecified disorder of visual pathways converts to ICD-9-CM 377.9 (optic nerve disorder NOS). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.