DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

S64 Injury of nerves at wrist and hand level

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

S64 is not billable. The category heads 84 billable codes in FY2027, grouped under 7 subdivisions. Its codes take a 7th character, so none is complete with fewer than 7 characters.

Index → code

  • Injurynerve NEChand → S64.9-
  • Injurynerve NECdigitalthumb → S64.3-
  • Injurynerve NECdigitalfinger → S64.4-

Where it sits

  1. Chapter 19 Injury, poisoning and certain other consequences of external causes (S00-T88)
  2. S60-S69 Injuries to the wrist, hand and fingers (S60-S69)
  3. S64 Injury of nerves at wrist and hand level
Billable codes
84
Subdivisions
7
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
11

Codes in S64

  1. S64.0
    Injury of ulnar nerve at wrist and hand level
    Header
  2. S64.00
    Injury of ulnar nerve at wrist and hand level of unspecified arm +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  3. S64.01
    Injury of ulnar nerve at wrist and hand level of right arm +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  4. S64.02
    Injury of ulnar nerve at wrist and hand level of left arm +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  5. S64.1
    Injury of median nerve at wrist and hand level
    Header
  6. S64.10
    Injury of median nerve at wrist and hand level of unspecified arm +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  7. S64.11
    Injury of median nerve at wrist and hand level of right arm +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  8. S64.12
    Injury of median nerve at wrist and hand level of left arm +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  9. S64.2
    Injury of radial nerve at wrist and hand level
    Header
  10. S64.20
    Injury of radial nerve at wrist and hand level of unspecified arm +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  11. S64.21
    Injury of radial nerve at wrist and hand level of right arm +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  12. S64.22
    Injury of radial nerve at wrist and hand level of left arm +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  13. S64.3
    Injury of digital nerve of thumb
    Header
  14. S64.30
    Injury of digital nerve of unspecified thumb +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  15. S64.31
    Injury of digital nerve of right thumb +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  16. S64.32
    Injury of digital nerve of left thumb +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  17. S64.4
    Injury of digital nerve of other and unspecified finger
    Header
  18. S64.40
    Injury of digital nerve of unspecified finger +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  19. S64.49
    Injury of digital nerve of other finger
    Header
  20. S64.490
    Injury of digital nerve of right index finger +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  21. S64.491
    Injury of digital nerve of left index finger +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  22. S64.492
    Injury of digital nerve of right middle finger +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  23. S64.493
    Injury of digital nerve of left middle finger +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  24. S64.494
    Injury of digital nerve of right ring finger +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  25. S64.495
    Injury of digital nerve of left ring finger +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  26. S64.496
    Injury of digital nerve of right little finger +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  27. S64.497
    Injury of digital nerve of left little finger +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  28. S64.498
    Injury of digital nerve of other finger +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Injury of digital nerve of specified finger with unspecified laterality
  29. S64.8
    Injury of other nerves at wrist and hand level
    Header
  30. S64.8X
    Injury of other nerves at wrist and hand level
    Header
  31. S64.8X1
    Injury of other nerves at wrist and hand level of right arm +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  32. S64.8X2
    Injury of other nerves at wrist and hand level of left arm +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  33. S64.8X9
    Injury of other nerves at wrist and hand level of unspecified arm +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  34. S64.9
    Injury of unspecified nerve at wrist and hand level
    Header
  35. S64.90
    Injury of unspecified nerve at wrist and hand level of unspecified arm +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  36. S64.91
    Injury of unspecified nerve at wrist and hand level of right arm +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  37. S64.92
    Injury of unspecified nerve at wrist and hand level of left arm +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters

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 S64

Code also

  • any associated open wound (S61.-) S61

Notes that also apply

Block S60-S69 instructions (Excludes2 3): 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 S64 defined here

The appropriate 7th character is to be added to each code from category S64

7th characters for S64
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

  • Injurynerve NEChand → S64.9-
  • Injurynerve NECulnar (forearm level)hand (level) → S64.0-
  • Injurynerve NECmedian (forearm level)hand (level) → S64.1-
  • Injurynerve NECradial (forearm level)hand (level) → S64.2-
  • Injurynerve NECdigitalthumb → S64.3-
  • Injurynerve NECdigitalfinger → S64.4-
  • Injurynerve NEChandspecified NEC → S64.8
  • Injurynerve NECdigitalfingerindex → S64.49-
  • Injurynerve NECdigitalfingerlittle → S64.49-
  • Injurynerve NECdigitalfingermiddle → S64.49-
  • Injurynerve NECdigitalfingerring → S64.49-

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

Hierarchy