S82.153R Displaced fracture of unspecified tibial tuberosity, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion

Name of the Condition

• Displaced fracture of unspecified tibial tuberosity, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion

Summary

A displaced fracture of the tibial tuberosity involves a break in the bony prominence on the anterior tibia where the patellar tendon attaches, with misalignment of bone fragments. This code specifies a subsequent encounter for an open fracture (types IIIA, IIIB, or IIIC) that has healed with malunion, meaning the fracture did not align properly during healing. Open fractures involve exposure of the bone through the skin, and malunion can affect knee function and stability.

Causes

Traumatic injury is the primary cause, such as direct impact to the knee, falls, or sudden forceful contraction of the quadriceps muscle. Sports-related incidents, motor vehicle accidents, or other high-impact events can lead to this fracture. Malunion may occur if the initial fracture was not properly aligned or stabilized during healing.

Risk Factors

• Participation in activities with rapid knee extension or jumping (e.g., basketball, soccer)
• Adolescent growth spurts, especially in athletes
• Previous knee injuries or surgeries
• Osteoporosis or bone-weakening conditions
• Inadequate initial fracture management or non-compliance with treatment

Symptoms

• Persistent pain and swelling over the tibial tuberosity
• Limited knee range of motion or deformity due to malunion
• Visible or palpable abnormal bone alignment
• History of prior open fracture with delayed or improper healing
• Possible functional impairment, such as difficulty bearing weight

Diagnosis

Diagnosis involves a physical examination to assess pain, swelling, and deformity, focusing on malunion signs. Imaging studies, such as X-rays, are used to confirm the fracture, evaluate alignment, and assess healing. CT scans may be ordered to detail the extent of malunion. Clinical history of the initial open fracture and subsequent healing is critical for accurate coding.

Treatment Options

Treatment depends on the severity of malunion and functional impact. Options may include physical therapy to improve mobility, orthopedic referral for assessment of surgical correction (e.g., osteotomy), or adaptive devices to support knee function. Pain management and activity modification are often part of the plan.

Prognosis and Follow-Up

Prognosis varies based on the degree of malunion and functional impairment. Regular follow-up with an orthopedic specialist is typical to monitor healing and address complications. Long-term outcomes may include chronic pain, reduced mobility, or the need for corrective surgery if malunion significantly affects knee function.

Complications

• Chronic pain or discomfort
• Reduced knee range of motion
• Increased risk of future knee injuries
• Potential need for surgical intervention to correct malunion
• Persistent swelling or instability

Lifestyle & Prevention

• Avoid high-impact activities that stress the knee until cleared by a provider
• Use proper protective gear during sports or physical activities
• Maintain bone health through adequate nutrition (e.g., calcium, vitamin D)
• Follow post-fracture rehabilitation plans to optimize healing and alignment

When to Seek Professional Help

Seek care if experiencing worsening pain, new swelling, or decreased knee function. Prompt evaluation is necessary if malunion symptoms interfere with daily activities or if there are signs of infection (e.g., redness, fever) at the fracture site.

Tips for Medical Coders

This code is for a subsequent encounter of an open fracture (types IIIA, IIIB, or IIIC) with malunion. Document the type of open fracture (IIIA, IIIB, or IIIC) and confirmation of malunion. Ensure the encounter is classified as "subsequent" (not initial or acute) and that the fracture is of the tibial tuberosity with displacement. Clinical notes should reflect the healing status and any functional impact.