2026 ICD-10-CM Diagnosis Code H34.00Transient retinal artery occlusion, unspecified eye

ICD-10-CM Codes›H00–H59›H30-H36›H34

ICD-10-CM H34.00
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H34.00 is a billable ICD-10-CM diagnosis code for transient retinal artery occlusion, unspecified eye. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is flagged as an unspecified code, since codes identifying laterality exist in the same family. Coders also document this condition as transient arterial retinal occlusion. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Retinal and vitreous conditions.

Code Identity

ICD-10-CM Code
H34.00
Billable Status
Yes — Valid for Submission
Code Describes
Transient retinal artery occlusion, unspecified eye
Short Description
Transient retinal artery occlusion, unspecified eye
Same as the full description in the CMS dataset.
Parent Code
H34.0
Transient retinal artery occlusion

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH30-H36Disorders of choroid and retina
CategoryH34Retinal vascular occlusions
This CodeH34.00Transient retinal artery occlusion, unspecified eye

Code EditsBilling

Medicare Code Editor checks that affect claim validity for H34.00.

Unspecified codes
Unspecified codes exist in the ICD-10-CM classification for circumstances when documentation in the medical record does not provide the level of detail needed to support reporting a more specific code. However, in the inpatient setting, there should generally be very limited and rare circumstances for which the laterality (right, left, bilateral) of a condition is unable to be documented and reported. The following pages contain the list of unspecified ICD-10-CM diagnosis codes for which there is a more specific code to identify laterality (right, left, bilateral) within that code family.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Transient arterial retinal 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

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 H34.00 to ICD-9-CMHistory

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

ICD-9-CM
362.34 Transient arterial occlu
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 H34.00Overview

Is H34.00 (Transient retinal artery occlusion) a billable code?

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

What is the ICD-9 equivalent of H34.00?

Under the General Equivalence Mappings, transient retinal artery occlusion, unspecified eye converts to ICD-9-CM 362.34 (transient arterial occlu). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.