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ICD-10-CM 2027 diagnosis code

H34Retinal vascular occlusions

Not billable — use a more specific code

H34 is a header code, so it can't be reported by itself. Choose one of the 5 more specific codes beneath it.

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

H34 is the ICD-10-CM diagnosis code for retinal vascular occlusions. It belongs to block H30-H36 (disorders of choroid and retina) and chapter 7 (diseases of the eye and adnexa). It is a header code, so it can't be reported by itself; one of its 5 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: H34.0 (occlusion), H34.1 (occlusion), H34.2 (occlusions), H34.8 (occlusions) and H34.9 (occlusion).

Don't report H34 together with the conditions in its Excludes1 note: amaurosis fugax (G45.3).

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

Specific codes under H34

Coding notes

Excludes1Not coded here — never report together with this code

Notes that apply from higher levels

Instructions written at a parent level also apply to H34.

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

Codes whose notes reference H34

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

Is H34 billable?

No. H34 is a header code. Report one of its more specific subcodes instead.