S82.092M Other fracture of left patella, subsequent encounter for open fracture type I or II with nonunion

Name of the Condition

• Other fracture of left patella, subsequent encounter for open fracture type I or II with nonunion

Summary

This condition describes a fracture of the left patella (kneecap) that does not fall into more specific fracture categories. The fracture is open (skin is broken) and classified as type I or II, indicating minimal to moderate soft tissue damage. It is documented during a subsequent encounter for this injury, and the fracture has failed to heal (nonunion). The term "other" denotes a fracture type not classified under more detailed subcategories, such as transverse or comminuted fractures.

Causes

Direct trauma to the left knee, such as a fall onto the kneecap, a blow from an object, or a forceful contraction of the quadriceps muscle. High-impact injuries, like those from sports, motor vehicle accidents, or falls, are common triggers. The open nature of the fracture may result from the injury mechanism involving a break in the skin, and nonunion can occur due to inadequate immobilization, poor blood supply, or infection.

Risk Factors

• Participation in activities with a high risk of knee injury, such as contact sports or skiing.
• Osteoporosis or other bone-weakening conditions.
• Previous knee injuries or surgeries.
• Advanced age, which may reduce bone density.
• Factors that impair healing, such as smoking or diabetes.

Symptoms

• Persistent pain in the left knee, often worsening with movement.
• Swelling and bruising around the kneecap that may not resolve.
• Inability to straighten the knee or bear weight.
• Visible deformity or a gap in the kneecap area.
• Possible signs of infection, such as redness, warmth, or drainage (if the fracture is open).

Diagnosis

A physical examination to assess knee movement, swelling, and tenderness. Imaging studies, typically X-rays, to confirm the fracture and evaluate bone alignment. Additional tests, such as CT scans or MRI, may be used to assess soft tissue damage or nonunion. Documentation of the fracture type (open I or II) and nonunion status is critical for accurate coding.

Treatment Options

• Immobilization with a cast or brace to stabilize the knee.
• Surgical intervention, such as internal fixation or bone grafting, to promote healing.
• Antibiotics if infection is present.
• Physical therapy to restore function and strength after healing.

Prognosis and Follow-Up

Prognosis depends on the severity of the fracture, treatment success, and patient factors. Nonunion may require additional interventions. Regular follow-up with imaging to monitor healing is essential. Long-term outcomes may include reduced mobility or chronic pain if healing is incomplete.

Complications

• Chronic pain or instability in the knee.
• Infection, particularly with open fractures.
• Arthritis due to joint damage.
• Persistent nonunion requiring further surgery.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Use protective gear during sports or activities with knee injury risk.
• Maintain bone health through diet and exercise.
• Follow post-treatment guidelines to support healing.

When to Seek Professional Help

Seek immediate care for severe pain, swelling, or inability to bear weight. Contact a provider if symptoms worsen, or if there are signs of infection (e.g., fever, drainage, redness).

Tips for Medical Coders

Document the fracture type (open I or II), nonunion status, and subsequent encounter details clearly. Ensure the left patella and "other" fracture classification are specified. Verify that the encounter is subsequent (not initial) and that nonunion is explicitly documented to support the code.