DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

H34 Retinal vascular occlusions

  • Header · not billable
  • Some codes take a 7th character

H34 is not billable. The category heads 45 billable codes in FY2027, grouped under 5 subdivisions.

Index → code

  • Embolism (multiple) (paradoxical)eye → H34.9
  • Obstruction, obstructed, obstructiveretinal (vessels) → H34.9
  • Occlusion, occludedretina, retinalvessels → H34.9

Where it sits

  1. Chapter 7 Diseases of the eye and adnexa (H00-H59)
  2. H30-H36 Disorders of choroid and retina (H30-H36)
  3. H34 Retinal vascular occlusions
Billable codes
45
Subdivisions
5
CC / MCC codes
29 / 0
HCC V28 codes
24
New FY2027
0
Index entries
10

Codes in H34

  1. H34.0
    Transient retinal artery occlusion
    Header
  2. H34.00
    Transient retinal artery occlusion, unspecified eye
    BillableCC
  3. H34.01
    Transient retinal artery occlusion, right eye
    BillableCC
  4. H34.02
    Transient retinal artery occlusion, left eye
    BillableCC
  5. H34.03
    Transient retinal artery occlusion, bilateral
    BillableCC
  6. H34.1
    Central retinal artery occlusion
    Header
  7. H34.10
    Central retinal artery occlusion, unspecified eye
    BillableCC
  8. H34.11
    Central retinal artery occlusion, right eye
    BillableCC
  9. H34.12
    Central retinal artery occlusion, left eye
    BillableCC
  10. H34.13
    Central retinal artery occlusion, bilateral
    BillableCC
  11. H34.2
    Other retinal artery occlusions
    Header
  12. H34.21
    Partial retinal artery occlusion
    Header
    Inclusion terms 2

    Inclusion terms

    • Hollenhorst's plaque
    • Retinal microembolism
  13. H34.211
    Partial retinal artery occlusion, right eye
    BillableCC
  14. H34.212
    Partial retinal artery occlusion, left eye
    BillableCC
  15. H34.213
    Partial retinal artery occlusion, bilateral
    BillableCC
  16. H34.219
    Partial retinal artery occlusion, unspecified eye
    BillableCC
  17. H34.23
    Retinal artery branch occlusion
    Header
  18. H34.231
    Retinal artery branch occlusion, right eye
    BillableCC
  19. H34.232
    Retinal artery branch occlusion, left eye
    BillableCC
  20. H34.233
    Retinal artery branch occlusion, bilateral
    BillableCC
  21. H34.239
    Retinal artery branch occlusion, unspecified eye
    BillableCC
  22. H34.8
    Other retinal vascular occlusions
    Header
  23. H34.81
    Central retinal vein occlusion
    Header
  24. H34.811
    Central retinal vein occlusion, right eye +7th: 0 1 2
    Needs 7th characterCC 0 1 2298 (all 7th characters)
  25. H34.812
    Central retinal vein occlusion, left eye +7th: 0 1 2
    Needs 7th characterCC 0 1 2298 (all 7th characters)
  26. H34.813
    Central retinal vein occlusion, bilateral +7th: 0 1 2
    Needs 7th characterCC 0 1 2298 (all 7th characters)
  27. H34.819
    Central retinal vein occlusion, unspecified eye +7th: 0 1 2
    Needs 7th characterCC 0 1 2298 (all 7th characters)
  28. H34.82
    Venous engorgement
    Header
    Inclusion terms 2

    Inclusion terms

    • Incipient retinal vein occlusion
    • Partial retinal vein occlusion
  29. H34.821
    Venous engorgement, right eye
    Billable
  30. H34.822
    Venous engorgement, left eye
    Billable
  31. H34.823
    Venous engorgement, bilateral
    Billable
  32. H34.829
    Venous engorgement, unspecified eye
    Billable
  33. H34.83
    Tributary (branch) retinal vein occlusion
    Header
  34. H34.831
    Tributary (branch) retinal vein occlusion, right eye +7th: 0 1 2
    Needs 7th character298 (all 7th characters)
  35. H34.832
    Tributary (branch) retinal vein occlusion, left eye +7th: 0 1 2
    Needs 7th character298 (all 7th characters)
  36. H34.833
    Tributary (branch) retinal vein occlusion, bilateral +7th: 0 1 2
    Needs 7th character298 (all 7th characters)
  37. H34.839
    Tributary (branch) retinal vein occlusion, unspecified eye +7th: 0 1 2
    Needs 7th character298 (all 7th characters)
  38. H34.9
    Unspecified retinal vascular occlusion
    BillableCC

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column. Rows marked +7th need a 7th character: pick one to build the full code; its code card has its own flags.

Instructions

At H34

Excludes1

  • amaurosis fugax (G45.3) G45.3

Notes that also apply

Chapter 7 instructions (Notes 1, Excludes2 11): printed on the chapter 7 page.

7th characters

7th characters for H34.81 defined at H34.81

One of the following 7th characters is to be assigned to codes in subcategory H34.81 to designate the severity of the occlusion:

7th characters for H34.81
7thMeaning (NCHS)
0with macular edema
1with retinal neovascularization
2stable

7th characters for H34.83 defined at H34.83

One of the following 7th characters is to be assigned to codes in subcategory H34.83 to designate the severity of the occlusion:

7th characters for H34.83
7thMeaning (NCHS)
0with macular edema
1with retinal neovascularization
2stable

A code that takes a 7th character is invalid without it; the placeholder X fills a code shorter than 6 characters (Official Guidelines I.A.5). How 7th characters work.

Index entries

  • Embolism (multiple) (paradoxical)eye → H34.9
  • Obstruction, obstructed, obstructiveretinal (vessels) → H34.9
  • Occlusion, occludedretina, retinalvein (central) → H34.81-
  • Occlusion, occludedretina, retinalvessels → H34.9
  • Occlusion, occludedarteryretinaltransient → H34.0-
  • Occlusion, occludedarteryretinalcentral → H34.1-
  • Occlusion, occludedarteryretinalpartial → H34.21-
  • Occlusion, occludedarteryretinalbranch → H34.23-
  • Occlusion, occludedretina, retinalvein (central)engorgement → H34.82-
  • Occlusion, occludedretina, retinalvein (central)tributary → H34.83-

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy