DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

S81 Open wound of knee and lower leg

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

S81 is not billable. The category heads 108 billable codes in FY2027, grouped under 2 subdivisions. Its codes take a 7th character, so none is complete with fewer than 7 characters.

Index → code

Where it sits

  1. Chapter 19 Injury, poisoning and certain other consequences of external causes (S00-T88)
  2. S80-S89 Injuries to the knee and lower leg (S80-S89)
  3. S81 Open wound of knee and lower leg
Billable codes
108
Subdivisions
2
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
24

Codes in S81

  1. S81.0
    Open wound of knee
    Header
  2. S81.00
    Unspecified open wound of knee
    Header
  3. S81.001
    Unspecified open wound, right knee +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  4. S81.002
    Unspecified open wound, left knee +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  5. S81.009
    Unspecified open wound, unspecified knee +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  6. S81.01
    Laceration without foreign body of knee
    Header
  7. S81.011
    Laceration without foreign body, right knee +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  8. S81.012
    Laceration without foreign body, left knee +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  9. S81.019
    Laceration without foreign body, unspecified knee +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  10. S81.02
    Laceration with foreign body of knee
    Header
  11. S81.021
    Laceration with foreign body, right knee +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  12. S81.022
    Laceration with foreign body, left knee +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  13. S81.029
    Laceration with foreign body, unspecified knee +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  14. S81.03
    Puncture wound without foreign body of knee
    Header
  15. S81.031
    Puncture wound without foreign body, right knee +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  16. S81.032
    Puncture wound without foreign body, left knee +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  17. S81.039
    Puncture wound without foreign body, unspecified knee +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  18. S81.04
    Puncture wound with foreign body of knee
    Header
  19. S81.041
    Puncture wound with foreign body, right knee +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  20. S81.042
    Puncture wound with foreign body, left knee +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  21. S81.049
    Puncture wound with foreign body, unspecified knee +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  22. S81.05
    Open bite of knee
    Header
    Inclusion terms 1, Excludes1 1

    Inclusion terms

    • Bite of knee NOS

    Excludes1

    • superficial bite of knee (S80.27-) S80.27
  23. S81.051
    Open bite, right knee +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  24. S81.052
    Open bite, left knee +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  25. S81.059
    Open bite, unspecified knee +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  26. S81.8
    Open wound of lower leg
    Header
  27. S81.80
    Unspecified open wound of lower leg
    Header
  28. S81.801
    Unspecified open wound, right lower leg +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  29. S81.802
    Unspecified open wound, left lower leg +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  30. S81.809
    Unspecified open wound, unspecified lower leg +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  31. S81.81
    Laceration without foreign body of lower leg
    Header
  32. S81.811
    Laceration without foreign body, right lower leg +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  33. S81.812
    Laceration without foreign body, left lower leg +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  34. S81.819
    Laceration without foreign body, unspecified lower leg +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  35. S81.82
    Laceration with foreign body of lower leg
    Header
  36. S81.821
    Laceration with foreign body, right lower leg +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  37. S81.822
    Laceration with foreign body, left lower leg +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  38. S81.829
    Laceration with foreign body, unspecified lower leg +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  39. S81.83
    Puncture wound without foreign body of lower leg
    Header
  40. S81.831
    Puncture wound without foreign body, right lower leg +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  41. S81.832
    Puncture wound without foreign body, left lower leg +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  42. S81.839
    Puncture wound without foreign body, unspecified lower leg +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  43. S81.84
    Puncture wound with foreign body of lower leg
    Header
  44. S81.841
    Puncture wound with foreign body, right lower leg +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  45. S81.842
    Puncture wound with foreign body, left lower leg +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  46. S81.849
    Puncture wound with foreign body, unspecified lower leg +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  47. S81.85
    Open bite of lower leg
    Header
    Inclusion terms 1, Excludes1 1

    Inclusion terms

    • Bite of lower leg NOS

    Excludes1

    • superficial bite of lower leg (S80.86-, S80.87-) S80.86 S80.87
  48. S81.851
    Open bite, right lower leg +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  49. S81.852
    Open bite, left lower leg +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  50. S81.859
    Open bite, unspecified lower leg +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 S81

Excludes1

  • open fracture of knee and lower leg (S82.-) S82
  • traumatic amputation of lower leg (S88.-) S88

Excludes2

  • open wound of ankle and foot (S91.-) S91

Code also

  • any associated wound infection

Notes that also apply

Block S80-S89 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 S81 defined here

The appropriate 7th character is to be added to each code from category S81

7th characters for S81
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

  • Wound, openknee → S81.00-
  • Lacerationknee → S81.01-
  • Punctureknee → S81.039
  • Bite(s) (animal) (human)knee → S81.05-
  • Wound, openleg (lower) → S81.80-
  • Lacerationleg (lower) → S81.819
  • Punctureleg (lower) → S81.839
  • Bite(s) (animal) (human)leg (lower) → S81.85-
  • Lacerationkneewith foreign body → S81.02-
  • Puncturekneeright → S81.031
  • Puncturekneeleft → S81.032
  • Puncturekneewith foreign body → S81.049
  • Lacerationleg (lower)right → S81.811
  • Lacerationleg (lower)left → S81.812
  • Lacerationleg (lower)with foreign body → S81.829
  • Punctureleg (lower)right → S81.831
  • Punctureleg (lower)left → S81.832
  • Punctureleg (lower)with foreign body → S81.849
  • Puncturekneerightwith foreign body → S81.041
  • Puncturekneeleftwith foreign body → S81.042
  • Lacerationleg (lower)rightwith foreign body → S81.821
  • Lacerationleg (lower)leftwith foreign body → S81.822
  • Punctureleg (lower)rightwith foreign body → S81.841
  • Punctureleg (lower)leftwith foreign body → S81.842

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

Hierarchy