Skeletal fluorosis, unspecified upper arm

This code signifies skeletal fluorosis affecting an unspecified upper arm. Skeletal fluorosis is a chronic metabolic bone disease caused by excessive intake of fluoride, leading to abnormal bone formation, increased bone density, and potential joint stiffness or pain.

Use this code when documentation specifies skeletal fluorosis impacting the upper arm, but the laterality (right or left) is not specified. This diagnosis is typically supported by a history of chronic fluoride exposure, radiographic findings of increased bone density, and clinical symptoms localized to the upper extremity.

• Ensure documentation explicitly states "unspecified upper arm" if laterality is unknown; otherwise, a more specific code should be used.
• Distinguish from other metabolic bone diseases like osteopetrosis or Paget's disease, which have different etiologies and radiographic features.
• Code any associated symptoms or complications, such as pain (M25.52-), separately.