Other cyst of bone, unspecified thigh

This code signifies the presence of a non-neoplastic, fluid-filled sac or lesion within the bone structure of the thigh, where the specific type of cyst is not further identified. It indicates an abnormal cavity within the bone that is not due to infection, trauma, or a tumor, and its exact nature remains unspecified.

This code is appropriate for cases where imaging studies (e.g., X-ray, MRI) reveal a bone cyst in the thigh, but the physician's documentation does not specify a more definitive type (e.g., aneurysmal bone cyst, unicameral bone cyst). It is used when the laterality of the thigh is also not documented.

• Ensure documentation clearly states "cyst of bone" in the thigh and lacks further specificity regarding the cyst type or laterality.
• Avoid using this code if a more specific type of bone cyst (e.g., M85.45- for solitary bone cyst) or laterality is documented.
• Query the provider for more specific information regarding the cyst type and laterality if available to allow for more precise coding.