Other rupture of muscle (nontraumatic), right upper arm

This diagnosis code signifies a spontaneous, non-injury-related tear or separation of muscle fibers within the right upper arm. It describes a rupture that occurs without external trauma, often due to underlying muscle weakness, overuse, or degenerative changes.

Apply this code when documentation clearly indicates a non-traumatic rupture of a muscle in the patient's right upper arm. This typically involves conditions like a spontaneous biceps rupture or a tear in the deltoid or triceps muscle not caused by an accident or external force. Documentation should specify the non-traumatic nature of the rupture.

• Differentiate carefully between traumatic (S46.- series) and non-traumatic ruptures; the documentation must explicitly state "nontraumatic" or "spontaneous."
• Ensure the laterality (right) and anatomical site (upper arm) are precisely documented to support this specific code.
• Avoid using this code for muscle strains or sprains without a definitive rupture; those conditions have separate codes.