AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2024 Issue 4; New/Revised ICD-10-CM Codes

Synovitis and Tenosynovitis

Code M65.9, Synovitis and tenosynovitis, unspecified, has been expanded to create new subcategories that include specific codes to identify synovitis and tenosynovitis of specific sites of the shoulder, upper arm, forearm, hand, thigh, lower leg, ankle and foot, other site, unspecified site, and multiple sites. Tenosynovitis, also known as synovitis, is an inflammation of the synovial membrane surrounding the tendons. The synovial membrane can become inflamed if it is damaged, infected, or irritated; and the inflammation can lead to other serious issues. Tenosynovitis is typically painful, and is most common in the wrists, hands, and feet. Symptoms...

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