S82.025R Nondisplaced longitudinal fracture of left patella, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion

Name of the Condition

• Nondisplaced longitudinal fracture of left patella, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion

Summary

A nondisplaced longitudinal fracture of the left patella is a vertical break in the kneecap that remains in its normal position without shifting. This fracture is classified as open (type IIIA, IIIB, or IIIC), indicating significant soft tissue damage and exposure of the bone. The term "subsequent encounter" refers to follow-up care after the initial treatment phase, and "malunion" means the bone has healed in a non-anatomic position. This condition requires ongoing evaluation to address healing, functional outcomes, and potential complications.

Causes

Direct trauma to the knee, such as a fall onto the kneecap, a forceful blow, or a sudden contraction of the quadriceps muscle. High-impact events like sports injuries or motor vehicle accidents are common triggers. The open nature of the fracture (type IIIA, IIIB, or IIIC) indicates severe soft tissue injury, including extensive laceration, degloving, or contamination, which may have contributed to the malunion.

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.
• Inadequate initial treatment or non-compliance with immobilization, increasing the risk of malunion.

Symptoms

• Persistent pain in the knee, especially with movement.
• Swelling and bruising around the kneecap.
• Inability to fully straighten the knee or bear weight.
• Visible deformity or abnormal knee alignment.
• Limited range of motion due to malunion.

Diagnosis

Physical examination to assess knee movement, swelling, and tenderness. Imaging studies, typically X-rays, to confirm the fracture and evaluate bone alignment and malunion. CT scans may be used to assess complex fractures or displacement. Clinical evaluation of soft tissue healing and wound status is critical for open fractures.

Treatment Options

• Orthopedic consultation to assess malunion and functional impact.
• Physical therapy to improve range of motion and strength.
• Pain management with medications or modalities.
• Surgical intervention may be considered for significant malunion affecting function.
• Monitoring for infection or other complications related to the open fracture.

Prognosis and Follow-Up

Prognosis depends on the severity of malunion and functional impairment. Follow-up care focuses on monitoring healing, addressing pain, and restoring mobility. Regular imaging and clinical assessments are necessary to evaluate progress and adjust treatment. Long-term outcomes may include residual stiffness or weakness.

Complications

• Chronic pain or instability.
• Limited range of motion due to malunion.
• Increased risk of arthritis in the knee joint.
• Infection or delayed healing from the open fracture.
• Need for additional surgery to correct malunion.

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 to reduce fracture risk.
• Follow post-treatment guidelines to support proper healing and prevent malunion.

When to Seek Professional Help

Seek immediate care if experiencing severe pain, swelling, or inability to bear weight. Consult a healthcare provider if symptoms worsen or new issues, such as infection signs (redness, drainage) or functional decline, occur.

Tips for Medical Coders

Document the fracture type (IIIA, IIIB, or IIIC), malunion status, and subsequent encounter details. Ensure clinical notes specify the open fracture classification and evidence of malunion to support coding. Verify that the encounter is subsequent (not initial) and that all relevant details are clearly recorded.