2021 ICD-10-CM Code S86.9

Injury of unspecified muscle and tendon at lower leg level

Version 2021
Non-Billable Code
Unspecified Code

Not Valid for Submission

S86.9 is a "header" nonspecific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of injury of unspecified muscle and tendon at lower leg 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.

Unspecified diagnosis codes like S86.9 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.

ICD-10:S86.9
Short Description:Injury of unspecified muscle and tendon at lower leg level
Long Description:Injury of unspecified muscle and tendon at lower leg level

Code Classification

Specific Coding for Injury of unspecified muscle and tendon at lower leg level

Header codes like S86.9 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 injury of unspecified muscle and tendon at lower leg level:

  • S86.90 - Unspecified injury of unspecified muscle and tendon at lower leg level
  • S86.901 - Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, right leg
  • S86.901A - Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, right leg, initial encounter
  • S86.901D - Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, right leg, subsequent encounter
  • S86.901S - Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, right leg, sequela
  • S86.902 - Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, left leg
  • S86.902A - Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, left leg, initial encounter
  • S86.902D - Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, left leg, subsequent encounter
  • S86.902S - Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, left leg, sequela
  • S86.909 - Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg
  • S86.909A - Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, initial encounter
  • S86.909D - Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, subsequent encounter
  • S86.909S - Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, sequela
  • S86.91 - Strain of unspecified muscle and tendon at lower leg level
  • S86.911 - Strain of unspecified muscle(s) and tendon(s) at lower leg level, right leg
  • S86.911A - Strain of unspecified muscle(s) and tendon(s) at lower leg level, right leg, initial encounter
  • S86.911D - Strain of unspecified muscle(s) and tendon(s) at lower leg level, right leg, subsequent encounter
  • S86.911S - Strain of unspecified muscle(s) and tendon(s) at lower leg level, right leg, sequela
  • S86.912 - Strain of unspecified muscle(s) and tendon(s) at lower leg level, left leg
  • S86.912A - Strain of unspecified muscle(s) and tendon(s) at lower leg level, left leg, initial encounter
  • S86.912D - Strain of unspecified muscle(s) and tendon(s) at lower leg level, left leg, subsequent encounter
  • S86.912S - Strain of unspecified muscle(s) and tendon(s) at lower leg level, left leg, sequela
  • S86.919 - Strain of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg
  • S86.919A - Strain of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, initial encounter
  • S86.919D - Strain of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, subsequent encounter
  • S86.919S - Strain of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, sequela
  • S86.92 - Laceration of unspecified muscle and tendon at lower leg level
  • S86.921 - Laceration of unspecified muscle(s) and tendon(s) at lower leg level, right leg
  • S86.921A - Laceration of unspecified muscle(s) and tendon(s) at lower leg level, right leg, initial encounter
  • S86.921D - Laceration of unspecified muscle(s) and tendon(s) at lower leg level, right leg, subsequent encounter
  • S86.921S - Laceration of unspecified muscle(s) and tendon(s) at lower leg level, right leg, sequela
  • S86.922 - Laceration of unspecified muscle(s) and tendon(s) at lower leg level, left leg
  • S86.922A - Laceration of unspecified muscle(s) and tendon(s) at lower leg level, left leg, initial encounter
  • S86.922D - Laceration of unspecified muscle(s) and tendon(s) at lower leg level, left leg, subsequent encounter
  • S86.922S - Laceration of unspecified muscle(s) and tendon(s) at lower leg level, left leg, sequela
  • S86.929 - Laceration of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg
  • S86.929A - Laceration of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, initial encounter
  • S86.929D - Laceration of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, subsequent encounter
  • S86.929S - Laceration of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, sequela
  • S86.99 - Other injury of unspecified muscle and tendon at lower leg level
  • S86.991 - Other injury of unspecified muscle(s) and tendon(s) at lower leg level, right leg
  • S86.991A - Other injury of unspecified muscle(s) and tendon(s) at lower leg level, right leg, initial encounter
  • S86.991D - Other injury of unspecified muscle(s) and tendon(s) at lower leg level, right leg, subsequent encounter
  • S86.991S - Other injury of unspecified muscle(s) and tendon(s) at lower leg level, right leg, sequela
  • S86.992 - Other injury of unspecified muscle(s) and tendon(s) at lower leg level, left leg
  • S86.992A - Other injury of unspecified muscle(s) and tendon(s) at lower leg level, left leg, initial encounter
  • S86.992D - Other injury of unspecified muscle(s) and tendon(s) at lower leg level, left leg, subsequent encounter
  • S86.992S - Other injury of unspecified muscle(s) and tendon(s) at lower leg level, left leg, sequela
  • S86.999 - Other injury of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg
  • S86.999A - Other injury of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, initial encounter
  • S86.999D - Other injury of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, subsequent encounter
  • S86.999S - Other injury of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, sequela

Information for Patients


Leg Injuries and Disorders

Your legs are made up of bones, blood vessels, muscles, and other connective tissue. They are important for motion and standing. Playing sports, running, falling, or having an accident can damage your legs. Common leg injuries include sprains and strains, joint dislocations, and fractures.

These injuries can affect the entire leg, or just the foot, ankle, knee, or hip. Certain diseases also lead to leg problems. For example, knee osteoarthritis, common in older people, can cause pain and limited motion. Problems in your veins in your legs can lead to varicose veins or deep vein thrombosis.


[Learn More]

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)