S52.235H Nondisplaced oblique fracture of shaft of left ulna, subsequent encounter for open fracture type I or II with delayed healing

Name of the Condition

• Nondisplaced oblique fracture of shaft of left ulna, subsequent encounter for open fracture type I or II with delayed healing

Summary

A nondisplaced oblique fracture of the shaft of the left ulna is a break in the long, straight portion of the left ulna bone (one of the two forearm bones) where the fracture line runs at an angle across the bone, and the bone fragments remain aligned. This type of fracture involves the main body of the ulna and is classified as an open fracture (type I or II), meaning there is a break in the skin with minimal contamination. The term "subsequent encounter" indicates this is a follow-up visit for the injury, and "delayed healing" refers to a fracture that has not progressed as expected toward union within the typical timeframe.

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 an angled break in the ulna shaft. Open fractures may result from the same mechanisms if the force also disrupts the skin. Delayed healing can occur due to factors like poor blood supply, infection, or inadequate immobilization.

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.
• Activities involving high-velocity impacts or penetrating trauma.
• Poor nutrition or smoking, 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 is displaced.
• Signs of delayed healing, such as lack of progress on follow-up imaging.

Diagnosis

Physical examination to assess tenderness, swelling, and range of motion. Imaging tests, such as X-rays, to confirm the fracture type and healing status. Evaluation of the open wound (if present) to determine contamination or infection risk. Assessment of healing progress through serial imaging to identify delayed union.

Treatment Options

Immobilization with a cast or splint to stabilize the fracture. Wound care for open fractures to prevent infection. Pain management with medications or other therapies. Surgical intervention if healing does not progress or if complications arise. Physical therapy to restore function once healing is underway.

Prognosis and Follow-Up

Prognosis depends on the severity of the fracture, adherence to treatment, and overall health. Follow-up visits are necessary to monitor healing and adjust care as needed. Delayed healing may require extended immobilization or additional interventions. Most fractures eventually heal with proper management, but recovery time can be longer than usual.

Complications

Infection at the site of the open wound. Nonunion, where the fracture fails to heal. Malunion, where the bone heals in an incorrect position. Nerve or blood vessel damage. Chronic pain or stiffness in the forearm.

Lifestyle & Prevention

Avoid high-risk activities or use protective gear when participating. Maintain bone health through a balanced diet and regular exercise. Quit smoking and limit alcohol to support healing. Follow post-injury care instructions carefully to promote proper healing.

When to Seek Professional Help

If pain worsens or does not improve with treatment. If swelling, redness, or drainage from the wound increases. If numbness, tingling, or weakness in the hand or fingers develops. If the fracture site shows no signs of healing over time.

Tips for Medical Coders

Use this code for a nondisplaced oblique fracture of the left ulna shaft with an open fracture type I or II, documented as a subsequent encounter with delayed healing. Ensure documentation specifies the fracture type, laterality (left), and the presence of delayed healing to support code assignment. Verify that the encounter is not the initial treatment episode, as this code is for follow-up care.