ICD-10-CM Code M17

Osteoarthritis of knee

Version 2020 Non-Billable Code

Not Valid for Submission

M17 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of osteoarthritis of knee. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

Short Description:Osteoarthritis of knee
Long Description:Osteoarthritis of knee

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

  • M17.0 - Bilateral primary osteoarthritis of knee
  • M17.1 - Unilateral primary osteoarthritis of knee
  • M17.10 - Unilateral primary osteoarthritis, unspecified knee
  • M17.11 - Unilateral primary osteoarthritis, right knee
  • M17.12 - Unilateral primary osteoarthritis, left knee
  • M17.2 - Bilateral post-traumatic osteoarthritis of knee
  • M17.3 - Unilateral post-traumatic osteoarthritis of knee
  • M17.30 - Unilateral post-traumatic osteoarthritis, unspecified knee
  • M17.31 - Unilateral post-traumatic osteoarthritis, right knee
  • M17.32 - Unilateral post-traumatic osteoarthritis, left knee
  • M17.4 - Other bilateral secondary osteoarthritis of knee
  • M17.5 - Other unilateral secondary osteoarthritis of knee
  • M17.9 - ... unspecified

Clinical Information

  • OSTEOARTHRITIS KNEE-. noninflammatory degenerative disease of the knee joint consisting of three large categories: conditions that block normal synchronous movement conditions that produce abnormal pathways of motion and conditions that cause stress concentration resulting in changes to articular cartilage. crenshaw campbell's operative orthopaedics 8th ed p2019

Code Classification

  • Diseases of the musculoskeletal system and connective tissue (M00–M99)
    • Osteoarthritis (M15-M19)
      • Osteoarthritis of knee (M17)

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


Osteoarthritis is the most common form of arthritis. It causes pain, swelling, and reduced motion in your joints. It can occur in any joint, but usually it affects your hands, knees, hips or spine.

Osteoarthritis breaks down the cartilage in your joints. Cartilage is the slippery tissue that covers the ends of bones in a joint. Healthy cartilage absorbs the shock of movement. When you lose cartilage, your bones rub together. Over time, this rubbing can permanently damage the joint.

Risk factors for osteoarthritis include

  • Being overweight
  • Getting older
  • Injuring a joint

No single test can diagnose osteoarthritis. Most doctors use several methods, including medical history, a physical exam, x-rays, or lab tests.

Treatments include exercise, medicines, and sometimes surgery.

NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases

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