2020 ICD-10-CM Diagnosis Code S99

Other and unspecified injuries of ankle and foot

    2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
  • S99 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 S99 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of S99 - other international versions of ICD-10 S99 may differ.
The following code(s) above S99 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 S99:
  • 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
  • S90-S99
    2020 ICD-10-CM Range S90-S99

    Injuries to the ankle and foot

    Type 2 Excludes
    • burns and corrosions (T20-T32)
    • fracture of ankle and malleolus (S82.-)
    • frostbite (T33-T34)
    • insect bite or sting, venomous (T63.4)
    Injuries to the ankle and foot
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 S99:
  • Type 2 Excludes: S89
    ICD-10-CM Diagnosis Code S89

    Other and unspecified injuries of lower leg

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Note
    • A fracture not indicated as open or closed should be coded to closed
    Type 2 Excludes
    • other and unspecified injuries of ankle and foot (S99.-)
ICD-10-CM Codes Adjacent To S99
S98.921D …… subsequent encounter
S98.921S …… sequela
S98.922 Partial traumatic amputation of left foot, level unspecified
S98.922A …… initial encounter
S98.922D …… subsequent encounter
S98.922S …… sequela
S98.929 Partial traumatic amputation of unspecified foot, level unspecified
S98.929A …… initial encounter
S98.929D …… subsequent encounter
S98.929S …… sequela
S99 Other and unspecified injuries of ankle and foot
S99.0 Physeal fracture of calcaneus
S99.00 Unspecified physeal fracture of calcaneus
S99.001 Unspecified physeal fracture of right calcaneus
S99.001A …… initial encounter for closed fracture
S99.001B …… initial encounter for open fracture
S99.001D …… subsequent encounter for fracture with routine healing
S99.001G …… subsequent encounter for fracture with delayed healing
S99.001K …… subsequent encounter for fracture with nonunion
S99.001P …… subsequent encounter for fracture with malunion
S99.001S …… sequela

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