2027 ICD-10-CM Diagnosis Code H47.43Disorders of optic chiasm in (due to) vascular disorders

ICD-10-CM Codes›H00–H59›H46-H47›H47

ICD-10-CM H47.43
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

H47.43 is a billable ICD-10-CM diagnosis code for disorders of optic chiasm in (due to) vascular disorders. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 91 through 93. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 13 closely related codes. Coders also document this condition as disorder of optic chiasm due to vascular disorder. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neuro-ophthalmology.

Code Identity

ICD-10-CM Code
H47.43
Billable Status
Yes — Valid for Submission
Code Describes
Disorders of optic chiasm in (due to) vascular disorders
Short Description
Disorders of optic chiasm in (due to) vascular disorders
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 CodeH47.43Disorders of optic chiasm in (due to) vascular disorders

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Disorder of optic chiasm due to vascular disorder
  • Disorder of visual pathway due to vascular disorder
  • Infarction of optic chiasm
  • Injury of optic chiasm

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to H47.43: its own notes plus those printed at H47.4 and 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)

Code Also

A second code may be needed to fully describe the condition; the note gives no sequencing direction.

From H47.4 Disorders of optic chiasm applies to 4 codes
  • underlying condition

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

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 H47.43 to ICD-9-CMHistory

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

ICD-9-CM
377.53 Opt chiasm w vascul dis
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 H47.43Overview

What is the ICD-10 code for disorders of optic chiasm in (due to) vascular disorders?

The ICD-10-CM code for disorders of optic chiasm in (due to) vascular disorders is H47.43 (sometimes written as H4743). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is H47.43 (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) vascular disorders on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does H47.43 group to?

When disorders of optic chiasm in (due to) vascular disorders is the principal diagnosis on an inpatient stay, it groups to MS-DRG 91, 92, 93, with relative weights from 0.7783 to 1.7050 depending on complications. Higher weights mean higher Medicare reimbursement.

Is H47.43 a CC or MCC?

CMS lists H47.43 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 13 closely related codes in its exclusion list.

What is the ICD-9 equivalent of H47.43?

Under the General Equivalence Mappings, disorders of optic chiasm in (due to) vascular disorders converts to ICD-9-CM 377.53 (opt chiasm w vascul dis). The mapping is a direct match.