Other cyst of bone, multiple sites

This code signifies the presence of multiple benign, fluid-filled sacs or cavities within bone tissue that are not otherwise specified. These cysts are typically asymptomatic but can weaken the bone, potentially leading to pathological fractures. They are distinct from malignant bone lesions or specific types of bone cysts with their own dedicated codes.

Apply this code when documentation clearly indicates the presence of "other" bone cysts affecting multiple skeletal sites, and a more specific ICD-10-CM code for the type of cyst (e.g., aneurysmal, solitary) is not provided or applicable. Supporting documentation should include imaging reports (X-ray, MRI, CT) confirming the presence and multiplicity of the cysts, along with a physician's diagnosis.

• Ensure the documentation explicitly states "multiple sites" to justify the use of this code, as single-site cysts have different codes.
• Review the medical record carefully to rule out more specific types of bone cysts (e.g., M85.4- for solitary bone cyst) before assigning this "other" and "multiple sites" code.
• Always sequence this code after any underlying condition that may be causing or associated with the bone cysts, if applicable and documented.