2026 ICD-10-CM Diagnosis Code H47.42Disorders of optic chiasm in (due to) neoplasm

ICD-10-CM Codes›H00–H59›H46-H47›H47

ICD-10-CM H47.42
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H47.42 is a billable ICD-10-CM diagnosis code for disorders of optic chiasm in (due to) neoplasm. 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 optic chiasm associated with non-pituitary neoplasm. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Conditions due to neoplasm or the treatment of neoplasm and Neuro-ophthalmology.

Code Identity

ICD-10-CM Code
H47.42
Billable Status
Yes — Valid for Submission
Code Describes
Disorders of optic chiasm in (due to) neoplasm
Short Description
Disorders of optic chiasm in (due to) neoplasm
Same as the full description in the CMS dataset.
Parent Code
H47.4
Disorders of optic chiasm

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 CodeH47.42Disorders of optic chiasm in (due to) neoplasm

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Disorder of optic chiasm associated with non-pituitary neoplasm
  • Disorder of optic chiasm due to neoplasm
  • Disorder of optic chiasm due to non-pituitary neoplasm
  • Disorder of visual pathways associated with neoplasm

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)
      • optic
        • chiasm
          • due to
            • neoplasm

Clinical ClassificationClinical

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

CCSR NEO074
Conditions due to neoplasm or the treatment of neoplasm
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR EYE006
Neuro-ophthalmology
Default principal diagnosis: inpatient No · outpatient No

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 H47.42 to ICD-9-CMHistory

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

ICD-9-CM
377.52 Opt chiasm dis/neopl NEC
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 H47.42Overview

Is H47.42 (Disorders of optic chiasm) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report disorders of optic chiasm in (due to) neoplasm on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of H47.42?

Under the General Equivalence Mappings, disorders of optic chiasm in (due to) neoplasm converts to ICD-9-CM 377.52 (opt chiasm dis/neopl NEC). 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.