Spontaneous rupture of other tendons, right upper arm

This code signifies the non-traumatic tearing of a tendon located in the patient's right upper arm. This rupture occurs without an external force or injury, often due to underlying degenerative changes or systemic conditions affecting tendon integrity.

Apply this code when documentation clearly states a spontaneous (non-traumatic) rupture of a tendon in the right upper arm, such as the biceps or triceps tendon. This diagnosis is typically supported by imaging studies (e.g., MRI, ultrasound) confirming the rupture and a clinical history ruling out acute trauma.

• Ensure the documentation specifies "spontaneous" or "non-traumatic" to differentiate from traumatic ruptures.
• Verify the laterality (right) and anatomical location (upper arm) are explicitly stated.
• Distinguish from M66.822 (left upper arm) and M66.829 (unspecified upper arm) based on documentation.