S82.035H Nondisplaced transverse fracture of left patella, subsequent encounter for open fracture type I or II with delayed healing

Name of the Condition

• Nondisplaced transverse fracture of left patella, subsequent encounter for open fracture type I or II with delayed healing

Summary

This condition involves a horizontal break across the left 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 fracture is open (type I or II), meaning the skin over the fracture site is breached but the wound is typically small and clean. This is a subsequent encounter, indicating ongoing care for the fracture, and "delayed healing" refers to a slower-than-expected recovery process.

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. The open fracture occurs when the trauma also breaks the skin, allowing the fracture site to communicate with the external environment. Delayed healing may result from factors like poor blood supply, infection, or inadequate immobilization.

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.
• Poor nutrition or smoking, which can impair bone healing.

Symptoms

• Persistent pain in the left knee, especially with movement.
• Swelling and bruising around the kneecap that does not improve over time.
• Inability to fully straighten the knee or bear weight.
• Visible deformity or a gap in the kneecap area.
• A "popping" sensation at the time of injury, possibly with ongoing discomfort.

Diagnosis

A physical examination to assess knee movement, swelling, and tenderness. Imaging studies, typically X-rays, to confirm the fracture and evaluate bone alignment. In some cases, a CT scan may be used to assess healing progress. Clinical evaluation of the open wound (type I or II) and documentation of delayed healing through follow-up visits.

Treatment Options

• Immobilization with a cast or brace to stabilize the knee and promote healing.
• Pain management with medications, as needed.
• Wound care for the open fracture to prevent infection.
• Physical therapy to restore knee function once healing progresses.
• Surgical intervention if delayed healing persists or complications arise.

Prognosis and Follow-Up

Most nondisplaced fractures heal with proper immobilization and care, but delayed healing may extend recovery time. Regular follow-up appointments are necessary to monitor healing progress, adjust treatment, and address any complications. Full recovery can take several months, depending on the severity of the fracture and individual healing factors.

Complications

• Infection at the open fracture site.
• Nonunion (failure of the bone to heal).
• Malunion (healing in an incorrect position).
• Chronic pain or stiffness in the knee.
• Reduced range of motion or mobility.

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.
• Follow post-injury care instructions closely to promote optimal recovery.

When to Seek Professional Help

• Severe or worsening pain that does not improve with treatment.
• Increased swelling, redness, or drainage from the wound.
• Fever or signs of infection.
• Inability to bear weight or move the knee.
• Numbness or tingling in the leg or foot.

Tips for Medical Coders

Document the fracture type (open, type I or II), the encounter type (subsequent), and evidence of delayed healing (e.g., clinical notes indicating prolonged healing time or lack of progress). Ensure the left patella and transverse fracture details are clearly recorded to support the code.