M13: Other arthritis

M13.8: Other specified arthritis

Other specified arthritis, classified under the ICD-10 code M13.8, refers to forms of arthritis not specifically named in the major categories of this joint condition. Arthritis is a term that broadly describes inflammation of one or more joints, leading to a variety of symptoms such as pain, stiffness, swelling, and decreased range of motion. The "other specified" category captures those instances of arthritis that may present with unusual symptoms, affect atypical joints, or caused by less common factors. These might be due to infections, underlying diseases, genetic predispositions, or metabolism issues. Though the symptoms are generally similar to common forms of arthritis, the disease progression, severity, and affected systems may widely vary depending upon the underlying cause. Just like other types of arthritis, ongoing inflammation can potentially lead to irreversible damage to the joints and cause disability.