S82.091K Other fracture of right patella, subsequent encounter for closed fracture with nonunion

Name of the Condition

• Other fracture of right patella, subsequent encounter for closed fracture with nonunion

Summary

This condition describes a fracture of the right patella (kneecap) that does not fall into more specific fracture categories. The fracture is closed (skin intact) and has failed to heal properly, resulting in nonunion. This is documented during a subsequent encounter, meaning the patient is receiving ongoing care for the established nonunion. The term "other" indicates the fracture pattern is not classified under more detailed subcategories.

Causes

Direct trauma to the right 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 or motor vehicle accidents, are common triggers. Nonunion may result from inadequate immobilization, poor blood supply to the bone, infection, or excessive movement at the fracture site during healing.

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.
• Smoking or other factors that impair bone healing.

Symptoms

• Persistent pain in the right knee, often worsening with activity.
• Swelling and bruising around the kneecap that may not resolve.
• Inability to fully straighten the knee or bear weight.
• Visible deformity or a gap in the kneecap area.
• A "popping" sensation or instability when moving the knee.

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 bone scans, may be used to assess healing and detect nonunion. The "other" classification may require a detailed description of the fracture pattern.

Treatment Options

• Immobilization with a cast or brace to stabilize the knee.
• Surgical intervention, such as internal fixation with screws or plates, to realign and stabilize the fracture.
• Bone grafting to promote healing in cases of nonunion.
• Physical therapy to restore strength and mobility after treatment.

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion and the effectiveness of treatment. Most patients experience improved function with appropriate intervention, but full recovery may take several months. Regular follow-up appointments are necessary to monitor healing and adjust treatment as needed.

Complications

• Chronic pain or stiffness in the knee.
• Arthritis or joint damage due to improper healing.
• Infection, particularly if surgery is required.
• Reduced mobility or difficulty bearing weight.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Use protective gear during sports or activities with a risk of knee injury.
• Maintain a healthy diet rich in calcium and vitamin D to support bone health.
• Quit smoking, as it can impair bone healing.

When to Seek Professional Help

Seek immediate medical attention if you experience severe pain, swelling, or deformity in the knee after an injury. Contact your healthcare provider if pain persists or worsens, or if you notice signs of infection, such as redness, warmth, or drainage.

Tips for Medical Coders

Document the encounter as a subsequent visit for a closed fracture with nonunion. Ensure the record specifies the fracture is closed (skin intact) and has not healed, with details supporting the nonunion diagnosis. Include any relevant imaging or clinical findings to justify the code selection.