2021 ICD-10-CM Code M63.86

Disorders of muscle in diseases classified elsewhere, lower leg

Version 2021
Non-Billable Code

Not Valid for Submission

M63.86 is a "header" nonspecific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of disorders of muscle in diseases classified elsewhere, lower leg. 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:M63.86
Short Description:Disorders of muscle in diseases classd elswhr, lower leg
Long Description:Disorders of muscle in diseases classified elsewhere, lower leg

Code Classification

Specific Coding for Disorders of muscle in diseases classd elswhr, lower leg

Header codes like M63.86 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 disorders of muscle in diseases classd elswhr, lower leg:

  • M63.861 - Disorders of muscle in diseases classified elsewhere, right lower leg
  • M63.862 - Disorders of muscle in diseases classified elsewhere, left lower leg
  • M63.869 - Disorders of muscle in diseases classified elsewhere, unspecified lower leg

Information for Patients


Muscle Disorders

Also called: Myopathy

Your muscles help you move and help your body work. Different types of muscles have different jobs. There are many problems that can affect muscles. Muscle disorders can cause weakness, pain or even paralysis.

Causes of muscle disorders include

Sometimes the cause is not known.


[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)