S52.246C Nondisplaced spiral fracture of shaft of ulna, unspecified arm, initial encounter for open fracture type IIIA, IIIB, or IIIC

Name of the Condition

• Nondisplaced spiral fracture of shaft of ulna, unspecified arm, initial encounter for open fracture type IIIA, IIIB, or IIIC

Summary

A nondisplaced spiral fracture of the shaft of the ulna, unspecified arm, is a break in the long, straight portion of the ulna bone (one of the two forearm bones) with a spiral pattern and no misalignment of bone fragments. This fracture typically results from rotational forces and involves the main body of the ulna without displacement, meaning the broken bone ends remain in their normal anatomical position. The fracture affects the ulna shaft and is documented as unspecified for the arm. The "initial encounter for open fracture type IIIA, IIIB, or IIIC" modifier indicates the fracture is open (exposing bone) with significant soft tissue damage, categorized as severe (type III) based on the Gustilo-Anderson classification.

Causes

Direct trauma to the forearm, such as from a fall, blow, or accident. High-impact injuries, including sports-related incidents or motor vehicle collisions. Indirect forces transmitted through the wrist or elbow, potentially causing a twisting break in the ulna shaft. Open fractures may result from trauma that breaches the skin, exposing the fractured bone.

Risk Factors

• Participation in contact sports or activities with a high risk of falls.
• Osteoporosis or other conditions that weaken bone density.
• Previous fractures or bone abnormalities that may predispose to injury.
• Advanced age, which can reduce bone strength.
• High-energy trauma, increasing the likelihood of open fractures.

Symptoms

• Pain and tenderness localized to the forearm.
• Swelling and bruising around the injured area.
• Difficulty moving the arm, wrist, or hand due to pain or instability.
• Possible visible deformity if the fracture is displaced.
• Open wound or exposed bone (for open fractures).
• Signs of infection, such as redness, pus, or fever (if the fracture is open).

Diagnosis

Physical examination to assess tenderness, swelling, and range of motion. Imaging tests, such as X-rays, to confirm the fracture type, location, and displacement. Evaluation of the open wound to determine the Gustilo-Anderson classification (IIIA, IIIB, or IIIC) for open fractures. Assessment of surrounding soft tissue damage and neurovascular status.

Treatment Options

Stabilization of the fracture, often with casting or splinting, to allow healing. Surgical intervention may be required for open fractures to clean the wound, repair soft tissue, and stabilize the bone. Antibiotics to prevent or treat infection in open fractures. Pain management and physical therapy to restore function after healing.

Prognosis and Follow-Up

Prognosis depends on the severity of the fracture and soft tissue damage. Nondisplaced fractures generally heal well with proper immobilization. Open fractures may have a longer recovery due to infection risk and tissue repair needs. Follow-up appointments to monitor healing, assess range of motion, and adjust treatment as needed. Physical therapy to regain strength and mobility.

Complications

Infection, particularly with open fractures. Delayed healing or nonunion of the fracture. Nerve or blood vessel damage from the injury or treatment. Chronic pain or stiffness in the forearm. Malunion (healing in an abnormal position) if displacement occurs.

Lifestyle & Prevention

Avoid high-risk activities or use protective gear (e.g., wrist guards) during sports. Maintain bone health through diet and exercise to reduce fracture risk. Prompt treatment of open wounds to minimize infection. Follow post-injury care instructions to support healing.

When to Seek Professional Help

Severe pain, swelling, or deformity after an injury. Open wound with exposed bone or signs of infection (redness, pus, fever). Numbness, tingling, or loss of circulation in the hand or fingers. Inability to move the arm or wrist.

Tips for Medical Coders

Document the fracture type (nondisplaced spiral), bone (ulna shaft), arm (unspecified), and encounter (initial). Specify the open fracture type (IIIA, IIIB, or IIIC) to accurately reflect the severity of soft tissue damage. Ensure clinical documentation supports the open fracture classification and initial encounter status.