S52.223M Displaced transverse fracture of shaft of unspecified ulna, subsequent encounter for open fracture type I or II with nonunion

Name of the Condition

• Displaced transverse fracture of shaft of unspecified ulna, subsequent encounter for open fracture type I or II with nonunion

Summary

A displaced transverse fracture of the shaft of the unspecified ulna is a horizontal break across the long, central portion of the ulna bone (one of the two forearm bones) where the bone fragments are shifted out of alignment. This is a subsequent encounter for an open fracture type I or II, meaning the skin over the fracture site was previously broken (type I) or had a wound larger than 1 cm without extensive soft tissue damage (type II), and the fracture has failed to heal (nonunion). The term "subsequent encounter" indicates this is a follow-up visit after initial treatment.

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 bone 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 remains displaced.
• Lack of healing progress noted on follow-up imaging.

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, displacement, and nonunion. Review of prior treatment and healing history to determine the fracture's status. Assessment of the open wound (if present) to classify the fracture type.

Treatment Options

• Immobilization with a cast or brace to stabilize the fracture.
• Surgical intervention, such as internal fixation with plates or screws, to realign and stabilize the bone.
• Bone grafting to promote healing in cases of nonunion.
• Antibiotics or wound care for open fractures to prevent infection.
• Physical therapy to restore function and strength after healing.

Prognosis and Follow-Up

Prognosis depends on the severity of the fracture, the success of treatment, and the patient's overall health. Nonunion may require additional interventions, such as surgery or bone grafting, to achieve healing. Regular follow-up visits and imaging are necessary to monitor progress. Most patients can regain functional use of the arm, but recovery may take several months.

Complications

• Infection, particularly with open fractures.
• Nerve or blood vessel damage near the fracture site.
• Chronic pain or stiffness.
• Limited range of motion or functional impairment.
• Delayed or failed healing (nonunion) requiring further treatment.

Lifestyle & Prevention

• Use protective gear during high-risk activities, such as sports or work.
• Maintain bone health through a balanced diet rich in calcium and vitamin D.
• Avoid smoking and excessive alcohol, which can impair healing.
• Engage in regular weight-bearing exercise to strengthen bones.
• Follow post-injury care instructions to support proper healing.

When to Seek Professional Help

• Persistent or worsening pain, swelling, or bruising.
• Signs of infection, such as fever, redness, or drainage from the wound.
• Difficulty moving the arm, wrist, or hand.
• Visible deformity or instability in the forearm.
• Lack of healing progress noted during follow-up appointments.

Tips for Medical Coders

Document the fracture type (open type I or II), the presence of nonunion, and the subsequent encounter status clearly. Include details about the fracture's location (shaft of unspecified ulna) and displacement. Ensure the open fracture classification and nonunion are supported by clinical findings or imaging. Code S52.223M is specific to a subsequent encounter for an open fracture type I or II with nonunion of the ulna shaft.