DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

S55 Injury of blood vessels at forearm level

  • Header · not billable
  • Codes take a 7th character

S55 is not billable. The category heads 135 billable codes in FY2027, grouped under 5 subdivisions. Its codes take a 7th character, so none is complete with fewer than 7 characters.

Index → code

  • Injuryblood vessel NECforearm → S55.90-
  • Injuryblood vessel NECulnar artery (forearm level) → S55.00-
  • Injuryblood vessel NECradial artery (forearm level) → S55.10-

Where it sits

  1. Chapter 19 Injury, poisoning and certain other consequences of external causes (S00-T88)
  2. S50-S59 Injuries to the elbow and forearm (S50-S59)
  3. S55 Injury of blood vessels at forearm level
Billable codes
135
Subdivisions
5
CC / MCC codes
45 / 0
HCC V28 codes
0
New FY2027
0
Index entries
15

Codes in S55

  1. S55.0
    Injury of ulnar artery at forearm level
    Header
  2. S55.00
    Unspecified injury of ulnar artery at forearm level
    Header
  3. S55.001
    Unspecified injury of ulnar artery at forearm level, right arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  4. S55.002
    Unspecified injury of ulnar artery at forearm level, left arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  5. S55.009
    Unspecified injury of ulnar artery at forearm level, unspecified arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  6. S55.01
    Laceration of ulnar artery at forearm level
    Header
  7. S55.011
    Laceration of ulnar artery at forearm level, right arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  8. S55.012
    Laceration of ulnar artery at forearm level, left arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  9. S55.019
    Laceration of ulnar artery at forearm level, unspecified arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  10. S55.09
    Other specified injury of ulnar artery at forearm level
    Header
  11. S55.091
    Other specified injury of ulnar artery at forearm level, right arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  12. S55.092
    Other specified injury of ulnar artery at forearm level, left arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  13. S55.099
    Other specified injury of ulnar artery at forearm level, unspecified arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  14. S55.1
    Injury of radial artery at forearm level
    Header
  15. S55.10
    Unspecified injury of radial artery at forearm level
    Header
  16. S55.101
    Unspecified injury of radial artery at forearm level, right arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  17. S55.102
    Unspecified injury of radial artery at forearm level, left arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  18. S55.109
    Unspecified injury of radial artery at forearm level, unspecified arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  19. S55.11
    Laceration of radial artery at forearm level
    Header
  20. S55.111
    Laceration of radial artery at forearm level, right arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  21. S55.112
    Laceration of radial artery at forearm level, left arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  22. S55.119
    Laceration of radial artery at forearm level, unspecified arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  23. S55.19
    Other specified injury of radial artery at forearm level
    Header
  24. S55.191
    Other specified injury of radial artery at forearm level, right arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  25. S55.192
    Other specified injury of radial artery at forearm level, left arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  26. S55.199
    Other specified injury of radial artery at forearm level, unspecified arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  27. S55.2
    Injury of vein at forearm level
    Header
  28. S55.20
    Unspecified injury of vein at forearm level
    Header
  29. S55.201
    Unspecified injury of vein at forearm level, right arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  30. S55.202
    Unspecified injury of vein at forearm level, left arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  31. S55.209
    Unspecified injury of vein at forearm level, unspecified arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  32. S55.21
    Laceration of vein at forearm level
    Header
  33. S55.211
    Laceration of vein at forearm level, right arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  34. S55.212
    Laceration of vein at forearm level, left arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  35. S55.219
    Laceration of vein at forearm level, unspecified arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  36. S55.29
    Other specified injury of vein at forearm level
    Header
  37. S55.291
    Other specified injury of vein at forearm level, right arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  38. S55.292
    Other specified injury of vein at forearm level, left arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  39. S55.299
    Other specified injury of vein at forearm level, unspecified arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  40. S55.8
    Injury of other blood vessels at forearm level
    Header
  41. S55.80
    Unspecified injury of other blood vessels at forearm level
    Header
  42. S55.801
    Unspecified injury of other blood vessels at forearm level, right arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  43. S55.802
    Unspecified injury of other blood vessels at forearm level, left arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  44. S55.809
    Unspecified injury of other blood vessels at forearm level, unspecified arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  45. S55.81
    Laceration of other blood vessels at forearm level
    Header
  46. S55.811
    Laceration of other blood vessels at forearm level, right arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  47. S55.812
    Laceration of other blood vessels at forearm level, left arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  48. S55.819
    Laceration of other blood vessels at forearm level, unspecified arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  49. S55.89
    Other specified injury of other blood vessels at forearm level
    Header
  50. S55.891
    Other specified injury of other blood vessels at forearm level, right arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  51. S55.892
    Other specified injury of other blood vessels at forearm level, left arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  52. S55.899
    Other specified injury of other blood vessels at forearm level, unspecified arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  53. S55.9
    Injury of unspecified blood vessel at forearm level
    Header
  54. S55.90
    Unspecified injury of unspecified blood vessel at forearm level
    Header
  55. S55.901
    Unspecified injury of unspecified blood vessel at forearm level, right arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  56. S55.902
    Unspecified injury of unspecified blood vessel at forearm level, left arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  57. S55.909
    Unspecified injury of unspecified blood vessel at forearm level, unspecified arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  58. S55.91
    Laceration of unspecified blood vessel at forearm level
    Header
  59. S55.911
    Laceration of unspecified blood vessel at forearm level, right arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  60. S55.912
    Laceration of unspecified blood vessel at forearm level, left arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  61. S55.919
    Laceration of unspecified blood vessel at forearm level, unspecified arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  62. S55.99
    Other specified injury of unspecified blood vessel at forearm level
    Header
  63. S55.991
    Other specified injury of unspecified blood vessel at forearm level, right arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  64. S55.992
    Other specified injury of unspecified blood vessel at forearm level, left arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  65. S55.999
    Other specified injury of unspecified blood vessel at forearm level, unspecified arm +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters

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 S55

Excludes2

  • injury of blood vessels at wrist and hand level (S65.-) S65
  • injury of brachial vessels (S45.1-S45.2) S45.1 S45.2

Code also

  • any associated open wound (S51.-) S51

Notes that also apply

Block S50-S59 instructions (Excludes2 4): printed on the block page.

Chapter 19 instructions (Notes 2, Excludes2 2, Use additional code 1): printed on the chapter 19 page.

7th characters

7th characters for S55 defined here

The appropriate 7th character is to be added to each code from category S55

7th characters for S55
7thMeaning (NCHS)
Ainitial encounter
Dsubsequent encounter
Ssequela

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

  • Injuryblood vessel NECulnar artery (forearm level) → S55.00-
  • Injuryblood vessel NECradial artery (forearm level) → S55.10-
  • Injuryblood vessel NECforearm → S55.90-
  • Injuryblood vessel NECulnar artery (forearm level)laceration → S55.01-
  • Injuryblood vessel NECulnar artery (forearm level)specified type NEC → S55.09-
  • Injuryblood vessel NECradial artery (forearm level)laceration → S55.11-
  • Injuryblood vessel NECradial artery (forearm level)specified type NEC → S55.19-
  • Injuryblood vessel NECforearmvein → S55.20-
  • Injuryblood vessel NECforearmlaceration → S55.91-
  • Injuryblood vessel NECforearmveinlaceration → S55.21-
  • Injuryblood vessel NECforearmveinspecified type NEC → S55.29-
  • Injuryblood vessel NECforearmspecifiedsite NEC → S55.80-
  • Injuryblood vessel NECforearmspecifiedtype NEC → S55.99-
  • Injuryblood vessel NECforearmspecifiedsite NEClaceration → S55.81-
  • Injuryblood vessel NECforearmspecifiedsite NECspecified type NEC → S55.89-

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

Hierarchy