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ICD-10-CM 2027 diagnosis code

H34.211Partial retinal artery occlusion, right eye

✓ Billable / specificCC — complication/comorbidity

H34.211 is a valid, billable ICD-10-CM code for partial retinal artery occlusion, right eye. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About H34.211

H34.211 is the ICD-10-CM diagnosis code for partial retinal artery occlusion, right eye. It belongs to category H34 (retinal vascular occlusions), block H30-H36 (disorders of choroid and retina) and chapter 7 (diseases of the eye and adnexa). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within H34.21 (partial retinal artery occlusion), H34.211 is specifically for partial retinal artery occlusion, right eye. Related codes cover left eye (H34.212), bilateral (H34.213) and unspecified eye (H34.219).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 123 (Neurological Eye Disorders, relative weight 0.822), in MDC 02 (Diseases and Disorders of the Eye), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 362.33 (partial retinal arterial occlusion).

Notes that apply from higher levels

Instructions written at a parent level also apply to H34.211.

› From H34 Retinal vascular occlusions
Excludes1

Broader instructions also apply from Chapter 7: Diseases of the eye and adnexa.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

MDC 02 · Diseases and Disorders of the Eye

ICD-9-CM equivalent

Converter →
  • 362.33Partial retinal arterial occlusionapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about H34.211

Is H34.211 billable?

Yes. H34.211 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can H34.211 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict H34.211 as a principal diagnosis.

Is H34.211 a CC or MCC?

H34.211 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does H34.211 group to?

H34.211 is used in the MS-DRG v44.0 logic for MS-DRG 123 (Neurological Eye Disorders). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for H34.211?

The CMS General Equivalence Mappings map H34.211 to ICD-9-CM 362.33.