2026 ICD-10-CM Diagnosis Code H34.9Unspecified retinal vascular occlusion

ICD-10-CM Codes›H00–H59›H30-H36›H34

ICD-10-CM H34.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H34.9 is a billable ICD-10-CM diagnosis code for unspecified retinal vascular occlusion. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Retinal and vitreous conditions.

Code Identity

ICD-10-CM Code
H34.9
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified retinal vascular occlusion
Short Description
Unspecified retinal vascular occlusion
Same as the full description in the CMS dataset.
Parent Code
H34
Retinal vascular occlusions

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH30-H36Disorders of choroid and retina
CategoryH34Retinal vascular occlusions
This CodeH34.9Unspecified retinal vascular occlusion

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Arteriospasm
  • Bilateral cholesterol embolus of retinal artery of bilateral eyes
  • Bilateral vascular occlusion of retina of eyes
  • Blood clot in eye
  • Calcific retinal embolus
  • Cholesterol retinal embolus
  • Cholesterol retinal embolus of left eye
  • Cholesterol retinal embolus of right eye
  • Chorioretinal infarction
  • Chorioretinal vascular disorder
  • Choroidal infarct
  • Ischemia of retina due to diabetes mellitus
  • Ischemia of retina due to type 1 diabetes mellitus
  • Ischemia of retina due to type 2 diabetes mellitus
  • Ischemic maculopathy
  • Macular infarction
  • Ocular ischemic syndrome
  • Platelet-fibrin retinal embolus
  • Rambaud Gallian syndrome
  • Retinal artery occlusion
  • Retinal artery spasm
  • Retinal embolus
  • Retinal ischemia
  • Retinal microembolism
  • Retinal vascular occlusion
  • Thrombosis of retinal artery
  • Vascular occlusion of retina of left eye
  • Vascular occlusion of retina of right eye
  • Vasospasm

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.

    • Embolism(multiple) (paradoxical)
      • eye
    • Obstruction, obstructed, obstructive
      • retinal (vessels)
    • Occlusion, occluded
      • retina, retinal
        • vessels

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.

  • Retinal Vascular Occlusion

    an occlusion of the retinal vasculature.

  • 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.

  • Arteriospasm

    an abnormal spasm of an artery.

  • Coronary Vasospasm

    sudden coronary artery smooth muscle contraction leading to lumen constriction and decreased blood flow.

  • Vasospasm

    sudden and often, paroxysmal contractions of the muscular wall of blood vessels.

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 H34.9 to ICD-9-CMHistory

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

ICD-9-CM
362.30 Retinal vasc occlus NOS
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 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About H34.9Overview

Is H34.9 (Retinal vascular occlusions) a billable code?

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

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

Under the General Equivalence Mappings, unspecified retinal vascular occlusion converts to ICD-9-CM 362.30 (retinal vasc occlus NOS). The mapping is a direct match.

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.