Other cyst of bone, right upper arm

This code signifies the presence of a non-neoplastic, fluid-filled or semi-solid sac within the bone of the patient's right upper arm. These cysts are typically benign and can be discovered incidentally or due to symptoms like pain or swelling.

Use this code when documentation specifies a "bone cyst," "simple bone cyst," or "aneurysmal bone cyst" located in the right humerus or other bone of the right upper arm. Supporting documentation should clearly indicate the laterality and anatomical site.

• Ensure the documentation specifies "right upper arm" to avoid laterality errors.
• Distinguish from neoplastic bone lesions, which would require different coding.
• Do not use for cysts of soft tissue adjacent to the bone; this code is strictly for intraosseous cysts.