ICD-10 Diagnosis Code M70.4

Prepatellar bursitis

Diagnosis Code M70.4

ICD-10: M70.4
Short Description: Prepatellar bursitis
Long Description: Prepatellar bursitis
This is the 2017 version of the ICD-10-CM diagnosis code M70.4

Code Classification
  • Diseases of the musculoskeletal system and connective tissue
    • Other soft tissue disorders (M70-M79)
      • Soft tissue disorders related to use, overuse and pressure (M70)

Information for Patients


A bursa is a small, fluid-filled sac that acts as a cushion between a bone and other moving parts, such as muscles, tendons, or skin. Bursitis occurs when a bursa becomes inflamed. People get bursitis by overusing a joint. It can also be caused by an injury. It usually occurs at the knee or elbow. Kneeling or leaning your elbows on a hard surface for a long time can make bursitis start. Doing the same kinds of movements every day or putting stress on joints increases your risk.

Symptoms of bursitis include pain and swelling. Your doctor will diagnose bursitis with a physical exam and tests such as x-rays and MRIs. He or she may also take fluid from the swollen area to be sure the problem isn't an infection.

Treatment of bursitis includes rest, pain medicines, or ice. If there is no improvement, your doctor may inject a drug into the area around the swollen bursa. If the joint still does not improve after 6 to 12 months, you may need surgery to repair damage and relieve pressure on the bursa.

NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases

  • Bursitis
  • Bursitis of the heel
  • Trochanteric bursitis
  • What Are Bursitis and Tendinitis? - NIH - Easy-to-Read (National Institute of Arthritis and Musculoskeletal and Skin Diseases)

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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

  • ACL reconstruction
  • Anterior crucate ligament (ACL) injury
  • Anterior cruciate ligament (ACL) injury -- aftercare
  • Anterior knee pain
  • Baker's cyst
  • Broken kneecap - aftercare
  • Collateral ligament (CL) injury -- aftercare
  • Getting your home ready - knee or hip surgery
  • Knee arthroscopy
  • Knee MRI scan
  • Knee pain
  • Meniscus tears -- aftercare
  • Osgood-Schlatter disease

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