M65.921
ICD-10-CMThis code signifies inflammation of the synovial membrane or tendon sheath in the right upper arm, where the specific cause or type of inflammation is not documented. It represents a general inflammatory process affecting these structures without further diagnostic specificity.
Use this code when documentation indicates synovitis or tenosynovitis of the right upper arm, but the provider has not specified the etiology (e.g., infectious, traumatic, crystal-induced) or a more precise anatomical location within the upper arm. This code is appropriate when the medical record lacks the detail for a more specific diagnosis.
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