Stress fracture, left ulna, initial encounter for fracture

This code signifies a stress fracture affecting the left ulna, which is a hairline crack in the bone resulting from repetitive stress rather than a single traumatic event. It indicates that this is the initial encounter for the diagnosis and treatment of this specific fracture.

Apply this code when documentation clearly states a stress fracture of the left ulna and the patient is receiving active treatment for the fracture. This includes initial evaluation, cast application, or surgical repair. Supporting documentation would typically include imaging reports (X-ray, MRI, bone scan) confirming the stress fracture and a physician's note detailing the diagnosis and treatment plan.

• Ensure laterality is accurately documented; this code is specific to the left ulna.
• Verify the encounter type; "A" indicates an initial encounter for active treatment. Subsequent care would require a different seventh character.
• Differentiate stress fractures from traumatic fractures; the mechanism of injury should support a stress-related etiology.