S52.226 Nondisplaced transverse fracture of shaft of unspecified ulna

Name of the Condition

• Nondisplaced transverse fracture of shaft of unspecified ulna

Summary

A nondisplaced transverse fracture of the shaft of the ulna is a straight-line break across the long, central portion of the ulna bone (one of the two forearm bones) where the bone fragments remain in their normal anatomical position. This fracture pattern involves a horizontal break through the bone shaft without displacement, meaning the bone pieces have not shifted out of alignment.

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 break in the ulna shaft.

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.

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 (though displacement is not present in this specific code).

Diagnosis

Physical examination to assess tenderness, swelling, and range of motion. Imaging tests, such as X-rays, to confirm the fracture and evaluate alignment. Additional imaging (e.g., CT scans) may be used for complex cases or to rule out associated injuries.

Treatment Options

• Immobilization using a cast or splint to support the ulna and promote healing.
• Pain management with medications such as nonsteroidal anti-inflammatory drugs (NSAIDs) or analgesics.
• Physical therapy to restore strength and mobility once healing progresses.
• Surgical intervention (rare for nondisplaced fractures) if instability or other complications arise.

Prognosis and Follow-Up

Most nondisplaced fractures of the ulna shaft heal well with conservative treatment, typically within 6–8 weeks. Follow-up appointments monitor healing progress, often with repeat imaging to confirm bone union. Full recovery of function is common, though some patients may experience residual stiffness or weakness.

Complications

• Delayed healing or nonunion if the fracture does not mend properly.
• Malunion, where the bone heals in an abnormal position (less likely with nondisplaced fractures).
• Nerve or vascular injury in severe cases, though rare with this fracture type.
• Chronic pain or reduced range of motion if rehabilitation is incomplete.

Lifestyle & Prevention

• Use protective gear during high-risk activities (e.g., sports, construction).
• Maintain bone health through adequate calcium and vitamin D intake.
• Avoid falls by improving home safety (e.g., removing tripping hazards).
• Engage in weight-bearing exercises to strengthen bones, especially for those with osteoporosis.

When to Seek Professional Help

Seek immediate medical attention if you experience severe pain, inability to move the arm, visible deformity, or signs of infection (e.g., redness, fever) after an injury. Follow up with a healthcare provider if symptoms worsen or do not improve with initial treatment.

Tips for Medical Coders

Document the fracture location (shaft of ulna) and type (nondisplaced transverse) clearly. Specify "unspecified" when the side (right/left) is not documented. Ensure the fracture is confirmed via imaging and that displacement is explicitly ruled out to support the nondisplaced classification.