S82.034K Nondisplaced transverse fracture of right patella, subsequent encounter for closed fracture with nonunion

Name of the Condition

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

Summary

This condition involves a horizontal break across the right kneecap (patella), a triangular bone that protects the knee joint. The fracture line runs perpendicular to the bone’s long axis, and the bone fragments remain aligned in their normal position (nondisplaced). The term "subsequent encounter" indicates this is a follow-up visit for the fracture, and "closed fracture with nonunion" means the skin over the fracture site is intact, but the bone has failed to heal properly after an expected time frame.

Causes

Direct trauma to the 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.
• Factors that impair healing, such as smoking, diabetes, or certain medications.

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.
• A visible or palpable gap at the fracture site in some cases.
• A sense of instability or "giving way" in 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. Clinical correlation with the patient’s history of the initial injury and treatment is essential.

Treatment Options

• Immobilization with a cast or brace to stabilize the knee and promote healing.
• Surgical intervention, such as internal fixation with screws or wires, to realign and stabilize the fracture.
• Bone grafting to stimulate healing in cases of nonunion.
• Physical therapy to restore strength and range of motion once healing is underway.
• Pain management with medications or other modalities.

Prognosis and Follow-Up

Prognosis 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 visits are necessary to monitor progress, typically with repeat imaging to assess bone union. Long-term outcomes may include residual stiffness or weakness, which can be addressed with rehabilitation.

Complications

• Chronic pain or instability in the knee.
• Arthritis in the knee joint due to altered mechanics.
• Infection, particularly if surgery is required.
• Nerve or blood vessel damage near the fracture site.
• Difficulty returning to pre-injury activities.

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 bone health through a balanced diet rich in calcium and vitamin D.
• Quit smoking, as it impairs bone healing.
• Follow post-injury rehabilitation plans to optimize recovery.

When to Seek Professional Help

Seek immediate medical attention if you experience severe pain, swelling, or inability to move the knee after an injury. For follow-up, consult a healthcare provider if pain persists, worsens, or if you notice new symptoms like increased swelling, redness, or fever, which may indicate infection or other complications.

Tips for Medical Coders

Document the encounter as a subsequent visit for a closed fracture with nonunion. Ensure the record specifies the fracture type (nondisplaced transverse), laterality (right), and the presence of nonunion. Include details about the fracture’s history, prior treatments, and current clinical status to support the code assignment.