Other rupture of muscle (nontraumatic), right forearm

This code signifies a spontaneous, non-traumatic tear or disruption of muscle tissue within the right forearm. This typically involves a sudden, forceful contraction or overuse leading to muscle fiber separation without external injury.

Apply this code when documentation clearly indicates a non-traumatic rupture of a muscle in the patient's right forearm. This diagnosis is often supported by physical examination findings (e.g., palpable defect, ecchymosis, pain with movement) and imaging studies like ultrasound or MRI confirming the tear.

• Differentiate carefully between traumatic and non-traumatic ruptures; traumatic ruptures (S46.311A, S46.811A, S46.911A) are coded differently.
• Ensure the documentation specifies "right forearm" and confirms the non-traumatic etiology.
• Avoid using this code for muscle strains or sprains, which are less severe injuries without complete muscle fiber disruption.