ICD-10-CM Code M63.86

Disorders of muscle in diseases classified elsewhere, lower leg

Version 2020 Non-Billable Code

Not Valid for Submission

M63.86 is a "header" nonspecific and non-billable 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 2020 for the submission of HIPAA-covered transactions.

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

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

  • 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

Code Classification

  • Diseases of the musculoskeletal system and connective tissue (M00–M99)
    • Disorders of muscles (M60-M63)
      • Disorders of muscle in diseases classified elsewhere (M63)

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


Muscle Disorders

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

  • Injury or overuse, such as sprains or strains, cramps or tendinitis
  • A genetic disorder, such as muscular dystrophy
  • Some cancers
  • Inflammation, such as myositis
  • Diseases of nerves that affect muscles
  • Infections
  • Certain medicines

Sometimes the cause is not known.


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