Version 2024

2024 ICD-10-CM Diagnosis Code S93.4

Sprain of ankle

ICD-10-CM Code:
S93.4
ICD-10 Code for:
Sprain of ankle
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • Injury, poisoning and certain other consequences of external causes
    (S00–T88)
    • Injuries to the ankle and foot
      (S90-S99)
      • Dislocation and sprain of joints and ligaments at ankle, foot and toe level
        (S93)

S93.4 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of sprain of ankle. The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Sprain of ankle

Non-specific codes like S93.4 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for sprain of ankle:

  • S93.40 for Sprain of unspecified ligament of ankle - NON-BILLABLE CODE

  • S93.401 for Sprain of unspecified ligament of right ankle - NON-BILLABLE CODE

  • Use S93.401A for initial encounter - BILLABLE CODE

  • Use S93.401D for subsequent encounter - BILLABLE CODE

  • Use S93.401S for sequela - BILLABLE CODE

  • S93.402 for Sprain of unspecified ligament of left ankle - NON-BILLABLE CODE

  • Use S93.402A for initial encounter - BILLABLE CODE

  • Use S93.402D for subsequent encounter - BILLABLE CODE

  • Use S93.402S for sequela - BILLABLE CODE

  • S93.409 for Sprain of unspecified ligament of unspecified ankle - NON-BILLABLE CODE

  • Use S93.409A for initial encounter - BILLABLE CODE

  • Use S93.409D for subsequent encounter - BILLABLE CODE

  • Use S93.409S for sequela - BILLABLE CODE

  • S93.41 for Sprain of calcaneofibular ligament - NON-BILLABLE CODE

  • S93.411 for Sprain of calcaneofibular ligament of right ankle - NON-BILLABLE CODE

  • Use S93.411A for initial encounter - BILLABLE CODE

  • Use S93.411D for subsequent encounter - BILLABLE CODE

  • Use S93.411S for sequela - BILLABLE CODE

  • S93.412 for Sprain of calcaneofibular ligament of left ankle - NON-BILLABLE CODE

  • Use S93.412A for initial encounter - BILLABLE CODE

  • Use S93.412D for subsequent encounter - BILLABLE CODE

  • Use S93.412S for sequela - BILLABLE CODE

  • S93.419 for Sprain of calcaneofibular ligament of unspecified ankle - NON-BILLABLE CODE

  • Use S93.419A for initial encounter - BILLABLE CODE

  • Use S93.419D for subsequent encounter - BILLABLE CODE

  • Use S93.419S for sequela - BILLABLE CODE

  • S93.42 for Sprain of deltoid ligament - NON-BILLABLE CODE

  • S93.421 for Sprain of deltoid ligament of right ankle - NON-BILLABLE CODE

  • Use S93.421A for initial encounter - BILLABLE CODE

  • Use S93.421D for subsequent encounter - BILLABLE CODE

  • Use S93.421S for sequela - BILLABLE CODE

  • S93.422 for Sprain of deltoid ligament of left ankle - NON-BILLABLE CODE

  • Use S93.422A for initial encounter - BILLABLE CODE

  • Use S93.422D for subsequent encounter - BILLABLE CODE

  • Use S93.422S for sequela - BILLABLE CODE

  • S93.429 for Sprain of deltoid ligament of unspecified ankle - NON-BILLABLE CODE

  • Use S93.429A for initial encounter - BILLABLE CODE

  • Use S93.429D for subsequent encounter - BILLABLE CODE

  • Use S93.429S for sequela - BILLABLE CODE

  • S93.43 for Sprain of tibiofibular ligament - NON-BILLABLE CODE

  • S93.431 for Sprain of tibiofibular ligament of right ankle - NON-BILLABLE CODE

  • Use S93.431A for initial encounter - BILLABLE CODE

  • Use S93.431D for subsequent encounter - BILLABLE CODE

  • Use S93.431S for sequela - BILLABLE CODE

  • S93.432 for Sprain of tibiofibular ligament of left ankle - NON-BILLABLE CODE

  • Use S93.432A for initial encounter - BILLABLE CODE

  • Use S93.432D for subsequent encounter - BILLABLE CODE

  • Use S93.432S for sequela - BILLABLE CODE

  • S93.439 for Sprain of tibiofibular ligament of unspecified ankle - NON-BILLABLE CODE

  • Use S93.439A for initial encounter - BILLABLE CODE

  • Use S93.439D for subsequent encounter - BILLABLE CODE

  • Use S93.439S for sequela - BILLABLE CODE

  • S93.49 for Sprain of other ligament of ankle - NON-BILLABLE CODE

  • S93.491 for Sprain of other ligament of right ankle - NON-BILLABLE CODE

  • Use S93.491A for initial encounter - BILLABLE CODE

  • Use S93.491D for subsequent encounter - BILLABLE CODE

  • Use S93.491S for sequela - BILLABLE CODE

  • S93.492 for Sprain of other ligament of left ankle - NON-BILLABLE CODE

  • Use S93.492A for initial encounter - BILLABLE CODE

  • Use S93.492D for subsequent encounter - BILLABLE CODE

  • Use S93.492S for sequela - BILLABLE CODE

  • S93.499 for Sprain of other ligament of unspecified ankle - NON-BILLABLE CODE

  • Use S93.499A for initial encounter - BILLABLE CODE

  • Use S93.499D for subsequent encounter - BILLABLE CODE

  • Use S93.499S for sequela - BILLABLE CODE

Coding Guidelines

The appropriate 7th character is to be added to each code from block Dislocation and sprain of joints and ligaments at ankle, foot and toe level (S93). Use the following options for the aplicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


Type 2 Excludes

Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
  • injury of Achilles tendon S86.0

Patient Education


Ankle Injuries and Disorders

Your ankle bone and the ends of your two lower leg bones make up the ankle joint. Your ligaments, which connect bones to one another, stabilize and support it. Your muscles and tendons move it.

The most common ankle problems are sprains and fractures (broken bones). A sprain is an injury to the ligaments. It may take a few weeks to many months to heal completely. A fracture is a break in a bone. You can also injure other parts of the ankle such as tendons, which join muscles to bone, and cartilage, which cushions your joints. Ankle sprains and fractures are common sports injuries.


[Learn More in MedlinePlus]

Sprains and Strains

A sprain is a stretched or torn ligament. Ligaments are tissues that connect bones at a joint. Falling, twisting, or getting hit can all cause a sprain. Ankle and wrist sprains are common. Symptoms include pain, swelling, bruising, and being unable to move your joint. You might feel a pop or tear when the injury happens.

A strain is a stretched or torn muscle or tendon. Tendons are tissues that connect muscle to bone. Twisting or pulling these tissues can cause a strain. Strains can happen suddenly or develop over time. Back and hamstring muscle strains are common. Many people get strains playing sports. Symptoms include pain, muscle spasms, swelling, and trouble moving the muscle.

At first, treatment of both sprains and strains usually involves resting the injured area, icing it, wearing a bandage or device that compresses the area, and medicines. Later treatment might include exercise and physical therapy.

NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases


[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.