2026 ICD-10-CM Diagnosis Code H34.232Retinal artery branch occlusion, left eye

ICD-10-CM Codes›H00–H59›H30-H36›H34

ICD-10-CM H34.232
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H34.232 is a billable ICD-10-CM diagnosis code for retinal artery branch occlusion, left eye. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 124 through 125. Coders also document this condition as arterial retinal branch occlusion. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Retinal and vitreous conditions.

Code Identity

ICD-10-CM Code
H34.232
Billable Status
Yes — Valid for Submission
Code Describes
Retinal artery branch occlusion, left eye
Short Description
Retinal artery branch occlusion, left eye
Same as the full description in the CMS dataset.
Parent Code
H34.23
Retinal artery branch occlusion

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH30-H36Disorders of choroid and retina
CategoryH34Retinal vascular occlusions
This CodeH34.232Retinal artery branch occlusion, left eye

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Arterial retinal branch occlusion
  • Cilioretinal artery occlusion
  • Occlusion of left branch retinal artery
  • Occlusion of left cilioretinal artery
  • Retinal artery occlusion

Clinical ClassificationClinical

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

CCSR EYE005
Retinal and vitreous conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Retinal Artery Occlusion

    sudden ischemia in the retina due to blocked blood flow through the central retinal artery or its branches leading to sudden complete or partial loss of vision, respectively, in the eye.

  • Central Retinal Artery Occlusion, Bilateral|Central retinal artery occlusion, bilateral

    evidence of central retinal artery occlusion that is bilateral.

  • Central Retinal Artery Occlusion, Left Eye|Central retinal artery occlusion, left eye

    evidence of central retinal artery occlusion in the left eye.

  • Central Retinal Artery Occlusion, Right Eye|Central retinal artery occlusion, right eye

    evidence of central retinal artery occlusion in the right eye.

  • Central Retinal Artery Occlusion|Central Retinal Arterial Occlusion|Central retinal artery occlusion, unspecified eye

    blockage of the central retinal artery.

  • Partial Retinal Arterial Occlusion|Partial retinal artery occlusion, unspecified eye

    a partial occlusion of the retinal artery.

  • Partial Retinal Artery Occlusion, Bilateral|Partial retinal artery occlusion, bilateral

    evidence of partial retinal artery occlusion that is bilateral.

  • Partial Retinal Artery Occlusion, Left Eye|Partial retinal artery occlusion, left eye

    evidence of partial retinal artery occlusion in the left eye.

  • Partial Retinal Artery Occlusion, Right Eye|Partial retinal artery occlusion, right eye

    evidence of partial retinal artery occlusion in the right eye.

  • Retinal Artery Occlusion

    an occlusion of the retinal artery.

  • Transient Retinal Arterial Occlusion|Transient retinal artery occlusion, unspecified eye

    a partial, temporary occlusion of the retinal artery.

  • Transient Retinal Artery Occlusion, Bilateral|Transient retinal artery occlusion, bilateral

    evidence of transient retinal artery occlusion that is bilateral.

  • Transient Retinal Artery Occlusion, Left Eye|Transient retinal artery occlusion, left eye

    evidence of transient retinal artery occlusion in the left eye.

  • Transient Retinal Artery Occlusion, Right Eye|Transient retinal artery occlusion, right eye

    evidence of transient retinal artery occlusion in the right eye.

Patient EducationClinical

Retinal Disorders

The retina is a layer of tissue in the back of your eye that senses light and sends images to your brain. In the center of this nerve tissue is the macula. It provides the sharp, central vision needed for reading, driving and seeing fine detail.

Read the full article at MedlinePlus

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

Convert H34.232 to ICD-9-CMHistory

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

ICD-9-CM
362.32 Arterial branch occlus
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 H34.232Overview

Is H34.232 (Retinal artery branch occlusion) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report retinal artery branch occlusion, left eye on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does H34.232 group to?

When retinal artery branch occlusion, left eye is the principal diagnosis on an inpatient stay, it groups to MS-DRG 124, 125, with relative weights from 0.7678 to 1.3231 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of H34.232?

Under the General Equivalence Mappings, retinal artery branch occlusion, left eye converts to ICD-9-CM 362.32 (arterial branch occlus). 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.