Rupture of synovium, unspecified shoulder

This code signifies a tear or break in the synovial membrane of the shoulder joint, without further specification of which shoulder is affected. The synovium is the connective tissue lining the joint capsule, responsible for producing synovial fluid that lubricates the joint. A rupture can lead to pain, swelling, and impaired joint function.

Apply this code when documentation clearly indicates a rupture of the shoulder synovium, but the laterality (left or right) is not specified by the provider. This is often used in initial assessments or when the specific shoulder is not yet definitively determined or recorded. Supporting documentation would include physician notes detailing a synovial rupture without laterality.

• Avoid using this code if the documentation specifies the affected shoulder (e.g., right or left); instead, use the more specific M66.111 or M66.112.
• Ensure the documentation differentiates a synovial rupture from other shoulder soft tissue injuries, such as tendon or ligament tears.
• This code should be sequenced as a primary diagnosis when the synovial rupture is the reason for the encounter.