Skeletal fluorosis, unspecified thigh

This code signifies a bone disorder resulting from excessive fluoride intake, specifically affecting the thigh region. Skeletal fluorosis leads to increased bone density, calcification of ligaments, and joint pain due to abnormal bone formation. The "unspecified" nature indicates that the laterality (right or left thigh) is not documented.

Apply this code when documentation confirms a diagnosis of skeletal fluorosis impacting the thigh, but the specific side (right or left) is not specified. This typically occurs in patients with chronic exposure to high levels of fluoride, often from contaminated drinking water or industrial sources, presenting with thigh pain, stiffness, or radiographic findings consistent with increased bone density in the femur.

• Ensure documentation clearly states "skeletal fluorosis" and specifies involvement of the "thigh."
• If laterality (right or left thigh) is documented, use the more specific codes M85.151 or M85.152.
• Consider co-reporting codes for the underlying cause of fluoride exposure if known and documented.