S82.844K Nondisplaced bimalleolar fracture of right lower leg, subsequent encounter for closed fracture with nonunion

Name of the Condition

• Nondisplaced bimalleolar fracture of right lower leg, subsequent encounter for closed fracture with nonunion
• ICD-10 Code: S82.844K

Summary

A nondisplaced bimalleolar fracture of the right lower leg involves a break in both the medial (inner) and lateral (outer) malleoli, the bony prominences at the distal end of the tibia and fibula. The fracture fragments remain in their normal alignment, and the injury is classified as closed (no open wound). This code applies to a subsequent encounter for a fracture that has failed to heal (nonunion) after an initial injury. The condition typically results from trauma that disrupts the ankle's stability without causing significant displacement, and the nonunion indicates delayed or incomplete healing.

Causes

Nondisplaced bimalleolar fractures commonly result from high-impact trauma, such as falls, motor vehicle accidents, or sports-related injuries. Direct force to the ankle, particularly when the foot is in a fixed position, can cause both malleoli to fracture without displacement. Twisting or rotational forces may also contribute to this type of injury. Nonunion may occur due to inadequate immobilization, poor blood supply to the fracture site, or underlying health conditions that impair healing.

Risk Factors

• Participation in activities with a high risk of ankle trauma, such as contact sports or skiing.
• Advanced age, which may lead to decreased bone density and increased fracture susceptibility.
• Conditions that weaken bone structure, such as osteoporosis or metabolic disorders.
• Previous ankle injuries or surgeries that compromise joint stability.
• Factors that impair healing, such as smoking, diabetes, or nutritional deficiencies.

Symptoms

• Persistent pain, swelling, and bruising around the ankle, even after initial treatment.
• Inability to bear weight on the affected leg.
• Visible deformity or instability of the ankle joint.
• Delayed healing or lack of improvement in symptoms over time.

Diagnosis

Diagnosis typically involves a physical examination to assess pain, swelling, and stability of the ankle. Imaging studies, such as X-rays, are used to confirm the fracture and evaluate for nonunion. Additional tests, like CT scans or MRIs, may be ordered to assess bone healing and rule out other complications. The clinician will also review the patient's medical history, including prior treatments and any factors that may have contributed to nonunion.

Treatment Options

Treatment for a nondisplaced bimalleolar fracture with nonunion may include immobilization with a cast or brace to stabilize the ankle and promote healing. Surgical intervention, such as internal fixation with screws or plates, may be necessary to realign the bones and encourage union. Bone grafting or other procedures to enhance healing may be considered in cases of severe nonunion. Physical therapy is often recommended to restore strength and mobility once healing progresses.

Prognosis and Follow-Up

The prognosis for a nondisplaced bimalleolar fracture with nonunion depends on the severity of the nonunion and the effectiveness of treatment. With appropriate intervention, many patients achieve successful healing and return to normal function. Follow-up care is essential to monitor healing progress, adjust treatment as needed, and address any complications. Regular imaging and clinical evaluations help ensure the fracture heals properly and the ankle regains stability.

Complications

• Chronic pain or instability of the ankle joint.
• Increased risk of arthritis due to joint damage.
• Infection, particularly if surgical intervention is required.
• Nerve or blood vessel damage in the affected area.
• Delayed or incomplete healing despite treatment.

Lifestyle & Prevention

• Avoid high-impact activities that risk ankle injury until fully healed.
• Use proper footwear and protective gear during sports or physical activities.
• Maintain a healthy diet rich in calcium and vitamin D to support bone health.
• Manage underlying conditions, such as diabetes or osteoporosis, to reduce fracture risk.
• Follow post-injury care instructions carefully to promote healing and prevent nonunion.

When to Seek Professional Help

Seek medical attention if you experience severe or worsening pain, swelling, or bruising around the ankle. Contact a healthcare provider if you cannot bear weight on the affected leg or notice a visible deformity. Prompt evaluation is important if symptoms persist or worsen after initial treatment, as this may indicate nonunion or other complications.

Tips for Medical Coders

When coding for S82.844K, ensure the documentation specifies a nondisplaced bimalleolar fracture of the right lower leg, a subsequent encounter, and a closed fracture with nonunion. Verify that the encounter is not the initial treatment phase and that the fracture has been confirmed as nonunion through imaging or clinical assessment. Accurate documentation of the fracture type, laterality, and healing status is critical for correct code assignment.