ICD-10-CM Code M12.86

Other specific arthropathies, not elsewhere classified, knee

Version 2020 Non-Billable Code

Not Valid for Submission

M12.86 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of other specific arthropathies, not elsewhere classified, knee. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10:M12.86
Short Description:Other specific arthropathies, not elsewhere classified, knee
Long Description:Other specific arthropathies, not elsewhere classified, knee

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

  • M12.861 - Other specific arthropathies, not elsewhere classified, right knee
  • M12.862 - Other specific arthropathies, not elsewhere classified, left knee
  • M12.869 - Other specific arthropathies, not elsewhere classified, unspecified knee

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 M12.86 are found in the index:


Code Classification

  • Diseases of the musculoskeletal system and connective tissue (M00–M99)
    • Inflammatory polyarthropathies (M05-M14)
      • Other and unspecified arthropathy (M12)

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


Knee Injuries and Disorders

Your knee joint is made up of bone, cartilage, ligaments and fluid. Muscles and tendons help the knee joint move. When any of these structures is hurt or diseased, you have knee problems. Knee problems can cause pain and difficulty walking.

Knee problems are very common, and they occur in people of all ages. Knee problems can interfere with many things, from participation in sports to simply getting up from a chair and walking. This can have a big impact on your life.

The most common disease affecting the knee is osteoarthritis. The cartilage in the knee gradually wears away, causing pain and swelling.

Injuries to ligaments and tendons also cause knee problems. A common injury is to the anterior cruciate ligament (ACL). You usually injure your ACL by a sudden twisting motion. ACL and other knee injuries are common sports injuries.

Treatment of knee problems depends on the cause. In some cases your doctor may recommend knee replacement.

NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases


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