2021 ICD-10-CM Code S96.21

Strain of intrinsic muscle and tendon at ankle and foot level

Version 2021
Non-Billable Code

Not Valid for Submission

S96.21 is a "header" nonspecific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of strain of intrinsic muscle and tendon at ankle and foot level. The code is NOT valid for the year 2021 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.

ICD-10:S96.21
Short Description:Strain of intrinsic msl/tnd at ankle and foot level
Long Description:Strain of intrinsic muscle and tendon at ankle and foot level

Code Classification

Specific Coding for Strain of intrinsic msl/tnd at ankle and foot level

Header codes like S96.21 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for strain of intrinsic msl/tnd at ankle and foot level:

  • S96.211 - ... right foot
  • S96.211A - ... right foot, initial encounter
  • S96.211D - ... right foot, subsequent encounter
  • S96.211S - ... right foot, sequela
  • S96.212 - ... left foot
  • S96.212A - ... left foot, initial encounter
  • S96.212D - ... left foot, subsequent encounter
  • S96.212S - ... left foot, sequela
  • S96.219 - ... unspecified foot
  • S96.219A - ... unspecified foot, initial encounter
  • S96.219D - ... unspecified foot, subsequent encounter
  • S96.219S - ... unspecified foot, sequela

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code S96.21 are found in the index:

Information for Patients


Foot Injuries and Disorders

Each of your feet has 26 bones, 33 joints, and more than 100 tendons, muscles, and ligaments. No wonder a lot of things can go wrong. Here are a few common problems:

Ill-fitting shoes often cause these problems. Aging and being overweight also increase your chances of having foot problems.


[Learn More in MedlinePlus]

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)