ICD-10-CM Code M23.00

Cystic meniscus, unspecified meniscus

Version 2020 Non-Billable Code

Not Valid for Submission

M23.00 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of cystic meniscus, unspecified meniscus. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10:M23.00
Short Description:Cystic meniscus, unspecified meniscus
Long Description:Cystic meniscus, unspecified meniscus

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

  • M23.000 - Cystic meniscus, unspecified lateral meniscus, right knee
  • M23.001 - Cystic meniscus, unspecified lateral meniscus, left knee
  • M23.002 - Cystic meniscus, unspecified lateral meniscus, unspecified knee
  • M23.003 - Cystic meniscus, unspecified medial meniscus, right knee
  • M23.004 - Cystic meniscus, unspecified medial meniscus, left knee
  • M23.005 - Cystic meniscus, unspecified medial meniscus, unspecified knee
  • M23.006 - ... right knee
  • M23.007 - ... left knee
  • M23.009 - ... unspecified 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 M23.00:

Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Cystic meniscus, unspecified lateral meniscus
  • Cystic meniscus, unspecified medial meniscus

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 M23.00 are found in the index:


Code Classification

  • Diseases of the musculoskeletal system and connective tissue (M00–M99)
    • Other joint disorders (M20-M25)
      • Internal derangement of knee (M23)

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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