S52.225K Nondisplaced transverse fracture of shaft of left ulna, subsequent encounter for closed fracture with nonunion

Name of the Condition

• Nondisplaced transverse fracture of shaft of left ulna, subsequent encounter for closed fracture with nonunion

Summary

A nondisplaced transverse fracture of the shaft of the left 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 alignment. The fracture runs horizontally through the bone shaft, and the lack of displacement means the bone pieces are not shifted out of position. This is a subsequent encounter for a closed fracture with nonunion, indicating the fracture has not healed properly after an initial injury and the skin remains intact.

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. Nonunion may result from inadequate immobilization, poor blood supply, infection, or excessive movement during healing.

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.
• Smoking or poor nutrition, which can impair healing.

Symptoms

• Persistent 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 becomes displaced over time.

Diagnosis

Physical examination to assess tenderness, swelling, and range of motion. Imaging studies, such as X-rays or CT scans, to confirm the fracture type and assess for nonunion. Evaluation of healing progress through serial imaging to determine if the fracture has failed to unite.

Treatment Options

• Immobilization with a cast or splint to stabilize the fracture.
• Surgical intervention, such as bone grafting or internal fixation, to promote healing.
• Physical therapy to restore strength and mobility once healing is underway.
• Pain management with medications or other modalities.

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion and the effectiveness of treatment. Regular follow-up with imaging is necessary to monitor healing. Full recovery may take several months, and some patients may experience long-term stiffness or weakness.

Complications

• Chronic pain or discomfort.
• Limited range of motion in the forearm or wrist.
• Increased risk of future fractures due to weakened bone.
• Potential need for additional surgery if nonunion persists.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Maintain a balanced diet rich in calcium and vitamin D to support bone health.
• Use protective gear during sports or activities with fall risks.
• Follow post-treatment instructions carefully to optimize healing.

When to Seek Professional Help

Seek immediate medical attention if pain worsens, swelling increases, or new deformity develops. Contact a healthcare provider if symptoms do not improve with treatment or if there are signs of infection, such as redness, warmth, or fever.

Tips for Medical Coders

Document the fracture type (nondisplaced transverse), location (shaft of left ulna), encounter type (subsequent), and presence of nonunion. Ensure clinical notes specify the fracture is closed and has not healed, supporting the use of this code. Include details on treatment approaches and follow-up to justify the diagnosis.