ICD-10-CM Code M22

Disorder of patella

Version 2020 Non-Billable Code

Not Valid for Submission

M22 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of disorder of patella. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10:M22
Short Description:Disorder of patella
Long Description:Disorder of patella

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

  • M22.0 - Recurrent dislocation of patella
  • M22.00 - Recurrent dislocation of patella, unspecified knee
  • M22.01 - Recurrent dislocation of patella, right knee
  • M22.02 - Recurrent dislocation of patella, left knee
  • M22.1 - Recurrent subluxation of patella
  • M22.10 - Recurrent subluxation of patella, unspecified knee
  • M22.11 - Recurrent subluxation of patella, right knee
  • M22.12 - Recurrent subluxation of patella, left knee
  • M22.2 - Patellofemoral disorders
  • M22.2X - Patellofemoral disorders
  • M22.2X1 - Patellofemoral disorders, right knee
  • M22.2X2 - Patellofemoral disorders, left knee
  • M22.2X9 - Patellofemoral disorders, unspecified knee
  • M22.3 - Other derangements of patella
  • M22.3X - Other derangements of patella
  • M22.3X1 - Other derangements of patella, right knee
  • M22.3X2 - Other derangements of patella, left knee
  • M22.3X9 - Other derangements of patella, unspecified knee
  • M22.4 - Chondromalacia patellae
  • M22.40 - Chondromalacia patellae, unspecified knee
  • M22.41 - Chondromalacia patellae, right knee
  • M22.42 - Chondromalacia patellae, left knee
  • M22.8 - Other disorders of patella
  • M22.8X - Other disorders of patella
  • M22.8X1 - Other disorders of patella, right knee
  • M22.8X2 - Other disorders of patella, left knee
  • M22.8X9 - Other disorders of patella, unspecified knee
  • M22.9 - Unspecified disorder of patella
  • M22.90 - Unspecified disorder of patella, unspecified knee
  • M22.91 - Unspecified disorder of patella, right knee
  • M22.92 - Unspecified disorder of patella, left knee

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code M22:

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • traumatic dislocation of patella S83.0

Code Classification

  • Diseases of the musculoskeletal system and connective tissue (M00–M99)
    • Other joint disorders (M20-M25)
      • Disorder of patella (M22)

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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