S52.226K Nondisplaced transverse fracture of shaft of unspecified ulna, subsequent encounter for closed fracture with nonunion

Name of the Condition

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

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 code represents a subsequent encounter for a closed fracture with nonunion, meaning the fracture has not healed properly after previous treatment, 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, or infection.

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

Diagnosis

Physical examination to assess tenderness, swelling, and range of motion. Imaging studies, such as X-rays or CT scans, to confirm the fracture and evaluate for nonunion. Assessment of healing progress through serial imaging and clinical evaluation.

Treatment Options

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

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion and response to treatment. Regular follow-up with imaging and clinical assessments is necessary to monitor healing. Recovery may take several months, and some cases may require long-term management.

Complications

• Chronic pain or discomfort.
• Limited range of motion or functional impairment.
• Increased risk of future fractures.
• Potential need for additional surgery if nonunion persists.

Lifestyle & Prevention

• Avoid high-risk activities that may lead to falls or trauma.
• Maintain bone health through proper nutrition and exercise.
• Use protective gear during sports or activities.
• Follow post-injury care instructions to support healing.

When to Seek Professional Help

Seek medical attention if pain worsens, swelling increases, or mobility is severely limited. Contact a healthcare provider if signs of infection, such as redness or fever, develop.

Tips for Medical Coders

Document the fracture type (nondisplaced transverse), location (shaft of unspecified ulna), encounter type (subsequent), and presence of nonunion. Ensure clinical notes support the nonunion diagnosis and subsequent encounter status. Code S52.226K is specific to closed fractures with nonunion; do not use for open fractures or initial encounters.