Which of the following is considered a preventive service under Medicare Part B?

Bone mass measurements are classified as a preventive service under Medicare Part B because they are specifically designed to assess bone density and evaluate the risk of osteoporosis in patients. This preventive measure aims to detect bone loss early, allowing for interventions that can decrease the risk of fractures and promote overall bone health. Such services are important in preventing more serious health issues down the line, aligning with the broader goal of Medicare Part B, which focuses on preventive care to enhance long-term health outcomes.

In contrast, the other options involve services that typically fall outside the scope of preventive healthcare. Surgery for chronic conditions addresses existing health issues rather than preventing future complications. Prescription medication management often pertains to the treatment of ongoing conditions, rather than preventive measures. Similarly, patient physical therapy is considered a rehabilitative service, aimed at recovery and management rather than prevention of disease or health deterioration.