Osteoarthritis

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01

Osteoarthritis (OA) can be defined as a group of distinct, but overlapping diseases, which may have different etiologies, but similar biological, morphological, and clinical outcomes affecting the articular cartilage, subchondral bone, ligaments, joint capsule, synovial membrane, and periarticular muscles. OA is the most common joint disease in persons 65 years of age and above. Its etiology is not fully understood, although there are several related factors, such as female gender, genetics, metabolism, and excessive mechanical stress. The diagnosis of OA is primarily based on clinical history and physical examination. The cardinal radiographic features of OA are focal/non-uniform narrowing of the joint space in the areas subjected to the most pressure, subchondral cysts, subchondral sclerosis, and osteophytes.

sections/codes in this section (FA00-FA0Z)

• Osteoarthritis of hip  (FA00)
• Osteoarthritis of knee  (FA01)
• Osteoarthritis of wrist or hand  (FA02)
• Osteoarthritis of other specified joint  (FA03)
• Oligoosteoarthritis  (FA04)
• Polyosteoarthritis  (FA05)
• Osteoarthritis, unspecified  (FA0Z)

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