2022 ICD-10-CM Code S93.409A
Sprain of unspecified ligament of unspecified ankle, initial encounter

Version 2022
ICD-10:S93.409A
Short Description:Sprain of unsp ligament of unspecified ankle, init encntr
Long Description:Sprain of unspecified ligament of unspecified ankle, initial encounter
Status: Valid for Submission

Code Classification

  • Injury, poisoning and certain other consequences of external causes (S00–T98)
    • Injuries to the ankle and foot (S90-S99)
      • Disloc & sprain of joints & ligaments at ankl, ft & toe lev (S93)

S93.409A is a billable diagnosis code used to specify a medical diagnosis of sprain of unspecified ligament of unspecified ankle, initial encounter. The code S93.409A is valid during the fiscal year 2022 from October 01, 2021 through September 30, 2022 for the submission of HIPAA-covered transactions.

The ICD-10-CM code S93.409A might also be used to specify conditions or terms like acute disruption of ankle syndesmosis, avulsion fracture of anterior fibula, avulsion of ligament with bony fragment, avulsion of ligament with bony fragment, avulsion of ligament with bony fragment of lateral malleolus , avulsion of ligament with bony fragment of medial malleolus, etc.

The code is commonly used in orthopedics medical specialties to specify clinical concepts such as selected sprains rotator cuff, cruciate ligament, and ankle.

S93.409A is an initial encounter code, includes a 7th character and should be used while the patient is receiving active treatment for a condition like sprain of unspecified ligament of unspecified ankle. According to ICD-10-CM Guidelines an "initial encounter" doesn't necessarily means "initial visit". The 7th character should be used when the patient is undergoing active treatment regardless if new or different providers saw the patient over the course of a treatment. The appropriate 7th character codes should also be used even if the patient delayed seeking treatment for a condition.

Unspecified diagnosis codes like S93.409A are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Coding Guidelines

The appropriate 7th character is to be added to each code from block Disloc & sprain of joints & ligaments at ankl, ft & toe lev (S93). Use the following options for the aplicable episode of care:

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

Convert S93.409A to ICD-9 Code

The General Equivalency Mapping (GEM) crosswalk indicates an approximate mapping between the ICD-10 code S93.409A its ICD-9 equivalent. The approximate mapping means there is not an exact match between the ICD-10 code and the ICD-9 code and the mapped code is not a precise representation of the original code.

Information for Patients


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.


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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


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Code History

  • 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 (First year ICD-10-CM implemented into the HIPAA code set)