Hypertrophy of bone, left femur

This diagnosis code signifies an abnormal enlargement or overgrowth of bone tissue specifically located in the left femur. This hypertrophy can result from various underlying conditions, including chronic stress, inflammation, or certain metabolic disorders, leading to increased bone density or size.

Apply this code when documentation explicitly states hypertrophy of the left femur. This typically occurs in scenarios such as Paget's disease affecting the femur, osteomyelitis with associated bone overgrowth, or reactive bone formation due to chronic injury or stress. Supporting documentation should include imaging reports (X-ray, MRI, CT) confirming the hypertrophy and a physician's diagnostic statement.

• Ensure the documentation specifies "hypertrophy" and not other bone abnormalities like osteosclerosis or osteophytes, which have different codes.
• Verify the laterality is explicitly stated as "left femur"; if unspecified, a different code would be required.
• Always code the underlying cause of the hypertrophy, if known and documented, as a primary or secondary diagnosis.