Incomplete atypical femoral fracture, left leg, init

This code describes an incomplete stress fracture of the left femur, characterized by a transverse or short oblique fracture line in the subtrochanteric region or femoral shaft, without complete cortical disruption. It is considered atypical due to its distinct radiographic features and association with long-term bisphosphonate use.

Use this code for a patient presenting with an incomplete atypical femoral fracture of the left leg, typically identified on imaging (X-ray, MRI) as a thickened lateral cortex or a short transverse fracture line. This code is appropriate for the initial encounter where the fracture is first diagnosed and treatment is initiated. Documentation should clearly specify "incomplete," "atypical," and "left leg."

• Ensure documentation specifies "incomplete" and "atypical" to differentiate from other femoral fractures.
• Verify laterality (left leg) is clearly documented.
• The 7th character "A" indicates an initial encounter for the fracture, regardless of subsequent visits for the same fracture.