ICD-10-CM Code M21.86

Other specified acquired deformities of lower leg

Version 2020 Non-Billable Code

Not Valid for Submission

M21.86 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of other specified acquired deformities of lower leg. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10:M21.86
Short Description:Other specified acquired deformities of lower leg
Long Description:Other specified acquired deformities of lower leg

Consider the following ICD-10 codes with a higher level of specificity:

  • M21.861 - Other specified acquired deformities of right lower leg
  • M21.862 - Other specified acquired deformities of left lower leg
  • M21.869 - Other specified acquired deformities of unspecified lower leg

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 M21.86 are found in the index:


Code Classification

  • Diseases of the musculoskeletal system and connective tissue (M00–M99)
    • Other joint disorders (M20-M25)
      • Other acquired deformities of limbs (M21)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

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]