2020 ICD-10-CM Diagnosis Code S81

Open wound of knee and lower leg

    2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
  • S81 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2020 edition of ICD-10-CM S81 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of S81 - other international versions of ICD-10 S81 may differ.
Code Also
Code Also Help
A code also note instructs that 2 codes may be required to fully describe a condition but the sequencing of the two codes is discretionary, depending on the severity of the conditions and the reason for the encounter.
  • any associated wound infection
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as S81. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • open fracture of knee and lower leg (
    ICD-10-CM Diagnosis Code S82
    • S82.0 Fracture of patella
    • S82.1 Fracture of upper end of tibia
    • S82.2 Fracture of shaft of tibia
    • S82.3 Fracture of lower end of tibia
    • S82.4 Fracture of shaft of fibula
    • S82.5 Fracture of medial malleolus
    • S82.6 Fracture of lateral malleolus
    • S82.8 Other fractures of lower leg
    • S82.9 Unspecified fracture of lower leg
    S82.-
    )
  • traumatic amputation of lower leg (
    ICD-10-CM Diagnosis Code S88
    • S88 Traumatic amputation of lower leg
      • S88.0 Traumatic amputation at knee level
        • S88.01 Complete traumatic amputation at knee level
          • S88.011 Complete traumatic amputation at knee level, ...
            • S88.011A Complete traumatic amputation at knee level, ...
            • S88.011D Complete traumatic amputation at knee level, ...
            • S88.011S Complete traumatic amputation at knee level, ...
          • S88.012 Complete traumatic amputation at knee level, ...
            • S88.012A Complete traumatic amputation at knee level, ...
            • S88.012D Complete traumatic amputation at knee level, ...
            • S88.012S Complete traumatic amputation at knee level, ...
          • S88.019 Complete traumatic amputation at knee level, ...
            • S88.019A Complete traumatic amputation at knee level, ...
            • S88.019D Complete traumatic amputation at knee level, ...
            • S88.019S Complete traumatic amputation at knee level, ...
        • S88.02 Partial traumatic amputation at knee level
          • S88.021 Partial traumatic amputation at knee level, r...
            • S88.021A Partial traumatic amputation at knee level, r...
            • S88.021D Partial traumatic amputation at knee level, r...
            • S88.021S Partial traumatic amputation at knee level, r...
          • S88.022 Partial traumatic amputation at knee level, l...
            • S88.022A Partial traumatic amputation at knee level, l...
            • S88.022D Partial traumatic amputation at knee level, l...
            • S88.022S Partial traumatic amputation at knee level, l...
          • S88.029 Partial traumatic amputation at knee level, u...
            • S88.029A Partial traumatic amputation at knee level, u...
            • S88.029D Partial traumatic amputation at knee level, u...
            • S88.029S Partial traumatic amputation at knee level, u...
      • S88.1 Traumatic amputation at level between knee an...
        • S88.11 Complete traumatic amputation at level betwee...
          • S88.111 Complete traumatic amputation at level betwee...
            • S88.111A Complete traumatic amputation at level betwee...
            • S88.111D Complete traumatic amputation at level betwee...
            • S88.111S Complete traumatic amputation at level betwee...
          • S88.112 Complete traumatic amputation at level betwee...
            • S88.112A Complete traumatic amputation at level betwee...
            • S88.112D Complete traumatic amputation at level betwee...
            • S88.112S Complete traumatic amputation at level betwee...
          • S88.119 Complete traumatic amputation at level betwee...
            • S88.119A Complete traumatic amputation at level betwee...
            • S88.119D Complete traumatic amputation at level betwee...
            • S88.119S Complete traumatic amputation at level betwee...
        • S88.12 Partial traumatic amputation at level between...
          • S88.121 Partial traumatic amputation at level between...
            • S88.121A Partial traumatic amputation at level between...
            • S88.121D Partial traumatic amputation at level between...
            • S88.121S Partial traumatic amputation at level between...
          • S88.122 Partial traumatic amputation at level between...
            • S88.122A Partial traumatic amputation at level between...
            • S88.122D Partial traumatic amputation at level between...
            • S88.122S Partial traumatic amputation at level between...
          • S88.129 Partial traumatic amputation at level between...
            • S88.129A Partial traumatic amputation at level between...
            • S88.129D Partial traumatic amputation at level between...
            • S88.129S Partial traumatic amputation at level between...
      • S88.9 Traumatic amputation of lower leg, level unsp...
        • S88.91 Complete traumatic amputation of lower leg, l...
          • S88.911 Complete traumatic amputation of right lower ...
            • S88.911A Complete traumatic amputation of right lower ...
            • S88.911D Complete traumatic amputation of right lower ...
            • S88.911S Complete traumatic amputation of right lower ...
          • S88.912 Complete traumatic amputation of left lower l...
            • S88.912A Complete traumatic amputation of left lower l...
            • S88.912D Complete traumatic amputation of left lower l...
            • S88.912S Complete traumatic amputation of left lower l...
          • S88.919 Complete traumatic amputation of unspecified ...
            • S88.919A Complete traumatic amputation of unspecified ...
            • S88.919D Complete traumatic amputation of unspecified ...
            • S88.919S Complete traumatic amputation of unspecified ...
        • S88.92 Partial traumatic amputation of lower leg, le...
          • S88.921 Partial traumatic amputation of right lower l...
            • S88.921A Partial traumatic amputation of right lower l...
            • S88.921D Partial traumatic amputation of right lower l...
            • S88.921S Partial traumatic amputation of right lower l...
          • S88.922 Partial traumatic amputation of left lower le...
            • S88.922A Partial traumatic amputation of left lower le...
            • S88.922D Partial traumatic amputation of left lower le...
            • S88.922S Partial traumatic amputation of left lower le...
          • S88.929 Partial traumatic amputation of unspecified l...
            • S88.929A Partial traumatic amputation of unspecified l...
            • S88.929D Partial traumatic amputation of unspecified l...
            • S88.929S Partial traumatic amputation of unspecified l...
    S88.-
    )
Type 2 Excludes
Type 2 Excludes Help
A type 2 excludes note represents "not included here". A type 2 excludes note indicates that the condition excluded is not part of the condition it is excluded from but a patient may have both conditions at the same time. When a type 2 excludes note appears under a code it is acceptable to use both the code (S81) and the excluded code together.
  • open wound of ankle and foot (
    ICD-10-CM Diagnosis Code S91
    • S91.0 Open wound of ankle
    • S91.1 Open wound of toe without damage to nail
    • S91.2 Open wound of toe with damage to nail
    • S91.3 Open wound of foot
    S91.-
    )
The following code(s) above S81 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to S81:
  • S00-T88
    2020 ICD-10-CM Range S00-T88

    Injury, poisoning and certain other consequences of external causes

    Note
    • Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
    Type 1 Excludes
    Use Additional
    • code to identify any retained foreign body, if applicable (Z18.-)
    Injury, poisoning and certain other consequences of external causes
  • S80-S89
    2020 ICD-10-CM Range S80-S89

    Injuries to the knee and lower leg

    Type 2 Excludes
    • burns and corrosions (T20-T32)
    • frostbite (T33-T34)
    • injuries of ankle and foot, except fracture of ankle and malleolus (S90-S99)
    • insect bite or sting, venomous (T63.4)
    Injuries to the knee and lower leg
Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
Code annotations containing back-references to S81:
  • Code Also: S84
    , S85
    , S86
    ICD-10-CM Diagnosis Code S84

    Injury of nerves at lower leg level

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Code Also
    • any associated open wound (S81.-)
    Type 2 Excludes
    • injury of nerves at ankle and foot level (S94.-)
    ICD-10-CM Diagnosis Code S85

    Injury of blood vessels at lower leg level

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Code Also
    • any associated open wound (S81.-)
    Type 2 Excludes
    • injury of blood vessels at ankle and foot level (S95.-)
    ICD-10-CM Diagnosis Code S86

    Injury of muscle, fascia and tendon at lower leg level

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Code Also
    • any associated open wound (S81.-)
    Type 2 Excludes
    • injury of muscle, fascia and tendon at ankle (S96.-)
    • injury of patellar ligament (tendon) (S76.1-)
    • sprain of joints and ligaments of knee (S83.-)
  • Type 2 Excludes: S71
    ICD-10-CM Diagnosis Code S71

    Open wound of hip and thigh

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Code Also
    • any associated wound infection
    Type 1 Excludes
    • open fracture of hip and thigh (S72.-)
    • traumatic amputation of hip and thigh (S78.-)
    Type 2 Excludes
    • bite of venomous animal (T63.-)
    • open wound of ankle, foot and toes (S91.-)
    • open wound of knee and lower leg (S81.-)
ICD-10-CM Codes Adjacent To S81
S80.921D …… subsequent encounter
S80.921S …… sequela
S80.922 Unspecified superficial injury of left lower leg
S80.922A …… initial encounter
S80.922D …… subsequent encounter
S80.922S …… sequela
S80.929 Unspecified superficial injury of unspecified lower leg
S80.929A …… initial encounter
S80.929D …… subsequent encounter
S80.929S …… sequela
S81 Open wound of knee and lower leg
S81.0 Open wound of knee
S81.00 Unspecified open wound of knee
S81.001 Unspecified open wound, right knee
S81.001A …… initial encounter
S81.001D …… subsequent encounter
S81.001S …… sequela
S81.002 Unspecified open wound, left knee
S81.002A …… initial encounter
S81.002D …… subsequent encounter
S81.002S …… sequela

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.