Pathological fracture in oth disease, unsp humerus, init

This code signifies a fracture of an unspecified humerus that occurred due to an underlying disease process, rather than trauma. The bone was weakened by a condition, leading to a break with minimal or no force. This is the initial encounter for the management of this specific fracture.

Apply this code when documentation clearly indicates a humerus fracture resulting from a pathological condition (e.g., osteoporosis, metastatic cancer, bone cyst) and the specific humerus (left or right) is not documented. This code is appropriate for the initial treatment phase of the fracture.

• Ensure documentation specifies "pathological fracture" and the underlying disease.
• If the specific humerus (left or right) is known, a more specific code (M84.621A or M84.622A) should be used.
• Always sequence the underlying disease causing the pathological fracture as the primary diagnosis, followed by this fracture code.