S82.036F Nondisplaced transverse fracture of unspecified patella, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with routine healing

Name of the Condition

• Nondisplaced transverse fracture of unspecified patella, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with routine healing

Summary

This condition involves a horizontal break across the kneecap (patella) where the bone fragments remain aligned (nondisplaced) and the fracture is open (exposing the bone to the external environment). The fracture line runs perpendicular to the bone’s long axis, and the open nature indicates the skin is breached, with severity classified as type IIIA, IIIB, or IIIC (involving extensive soft tissue damage, contamination, or vascular injury). This is a subsequent encounter, meaning the patient is receiving follow-up care for a fracture that is healing as expected without complications.

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 exposure of the fractured bone. Type IIIA, IIIB, or IIIC open fractures involve significant soft tissue damage, contamination, or vascular injury, often resulting from severe trauma.

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.
• Situations where the knee is exposed to direct impact or forceful flexion, increasing the risk of open fractures.

Symptoms

• Sudden, severe pain in the knee.
• Swelling and bruising around the kneecap.
• Inability to straighten the knee or bear weight.
• Visible deformity or a gap in the kneecap area.
• A "popping" sensation at the time of injury.
• Open wound over the kneecap, with possible signs of infection or tissue damage (for open fractures).

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 the extent of soft tissue damage or bone fragmentation. Documentation of the open fracture type (IIIA, IIIB, or IIIC) and confirmation of routine healing are critical for accurate diagnosis.

Treatment Options

• Immobilization with a cast or brace to stabilize the knee and promote healing.
• Surgical intervention may be required for severe open fractures to clean the wound, repair soft tissue, or stabilize the bone.
• Antibiotics to prevent or treat infection, especially for open fractures.
• Pain management with medications or other therapies.
• Physical therapy to restore knee function and strength once healing is underway.

Prognosis and Follow-Up

With proper treatment, most nondisplaced transverse patella fractures heal without long-term complications. Routine healing indicates the fracture is progressing as expected, with gradual improvement in pain and function. Follow-up care typically includes regular monitoring of the fracture site, imaging to confirm healing, and adjustments to treatment as needed. Return to normal activities depends on the severity of the injury and the patient’s response to therapy.

Complications

• Infection, particularly with open fractures.
• Delayed healing or nonunion of the fracture.
• Arthritis or chronic pain in the knee joint.
• Stiffness or reduced range of motion.
• Nerve or blood vessel damage, especially with severe open fractures.

Lifestyle & Prevention

• Use protective gear during high-risk activities, such as knee pads in sports.
• Maintain bone health through a balanced diet rich in calcium and vitamin D.
• Avoid activities that place excessive stress on the knee, especially if you have a history of injury.
• Follow post-injury rehabilitation guidelines to restore strength and flexibility.

When to Seek Professional Help

• Severe or worsening pain that does not improve with rest or medication.
• Signs of infection, such as fever, redness, or pus at the wound site.
• Numbness, tingling, or loss of circulation in the leg or foot.
• Inability to bear weight or move the knee after initial treatment.
• Any new or worsening symptoms that concern you.

Tips for Medical Coders

Document the fracture type (nondisplaced transverse), the open fracture classification (IIIA, IIIB, or IIIC), and the fact that this is a subsequent encounter with routine healing. Ensure the medical record supports the open fracture severity and confirms the fracture is healing without complications. Use this code only when the encounter is for follow-up care of an open fracture that has progressed to routine healing.