S82.021M Displaced longitudinal fracture of right patella, subsequent encounter for open fracture type I or II with nonunion

Name of the Condition

• Displaced longitudinal fracture of right patella, subsequent encounter for open fracture type I or II with nonunion

Summary

A displaced longitudinal fracture of the right patella is a vertical break in the kneecap where bone fragments are misaligned. This code applies to a subsequent encounter for an open fracture type I or II (where the skin is breached but with minimal soft tissue damage) that has failed to heal (nonunion). The condition requires ongoing evaluation and management to address both the fracture and the lack of bone union.

Causes

Direct trauma to the knee, such as a fall onto the kneecap, a forceful blow, or a sudden contraction of the quadriceps muscle. High-impact events like motor vehicle accidents or sports injuries are common triggers. Nonunion may result from inadequate initial treatment, poor blood supply, or excessive movement at the fracture site.

Risk Factors

• Participation in high-risk activities or contact sports.
• Osteoporosis or other conditions that weaken bone strength.
• Advanced age, which may reduce bone density.
• Previous knee injuries or surgeries.
• Inadequate immobilization or noncompliance with treatment during initial healing.

Symptoms

• Persistent pain and swelling in the knee.
• Visible deformity or misalignment of the kneecap.
• Inability to straighten or bend the knee fully.
• Bruising or tenderness around the fracture site.
• Possible open wound (type I or II) with minimal soft tissue damage.
• Lack of healing progress over time (nonunion).

Diagnosis

Physical examination to assess knee alignment, swelling, and tenderness. Imaging tests, such as X-rays or CT scans, to confirm the fracture, evaluate displacement, and assess for nonunion. MRI may be used to evaluate soft tissue damage or blood supply to the bone. Documentation of the open fracture type (I or II) and evidence of nonunion (e.g., persistent fracture line, lack of callus formation) is critical.

Treatment Options

• Surgical intervention: May include revision surgery to realign and stabilize the fracture, address nonunion (e.g., bone grafting, hardware revision), or treat the open wound.
• Immobilization: Use of a brace or cast to limit movement and support healing.
• Physical therapy: To restore knee function and strength once healing progresses.
• Wound care: For open fractures to prevent infection and promote healing.

Prognosis and Follow-Up

Prognosis depends on the success of treatment and the extent of nonunion. Follow-up imaging (e.g., X-rays) is typically performed to monitor healing. Regular appointments with an orthopedic specialist are necessary to assess progress and adjust treatment. Full recovery may take several months, and some functional limitations may persist.

Complications

• Infection (especially with open fractures).
• Persistent pain or instability.
• Nonunion or malunion (improper healing).
• Arthritis or long-term joint damage.
• Nerve or blood vessel injury.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Use protective gear during sports or high-risk activities.
• Maintain bone health through adequate nutrition (e.g., calcium, vitamin D) and exercise.
• Follow post-treatment instructions carefully to support healing.

When to Seek Professional Help

Seek immediate medical attention if you experience severe pain, swelling, or deformity after a knee injury. Contact your healthcare provider if symptoms worsen, or if you notice signs of infection (e.g., redness, pus, fever) or lack of healing progress.

Tips for Medical Coders

Document the subsequent encounter, open fracture type (I or II), and nonunion clearly. Include details on the fracture’s alignment, treatment provided, and evidence of nonunion (e.g., imaging results, clinical assessment). Ensure the code aligns with the specific encounter type and fracture characteristics to support accurate coding.