Z89.6 Acquired absence of leg above knee

Name of the Condition

• Acquired absence of leg above knee
• ICD Code: Z89.6

Summary

Acquired absence of the leg above the knee refers to the loss of the lower limb at or above the knee joint due to events occurring after birth. This condition results from surgical amputation or traumatic injury and significantly impacts mobility and daily function.

Causes

The absence of the leg above the knee can result from surgical removal due to severe trauma, infection, vascular disease, or malignancy. Traumatic injuries, such as motor vehicle accidents or severe fractures, may also necessitate amputation. Complications from chronic conditions like diabetes or peripheral artery disease can lead to tissue loss requiring amputation.

Risk Factors

History of lower limb injury or surgery, advanced age, underlying vascular or metabolic conditions (e.g., diabetes), and occupations or activities with high risk of traumatic injury.

Symptoms

• Visible absence of the leg above the knee
• Difficulty with standing, walking, or balancing
• Reduced mobility and functional limitations
• Possible residual limb pain or phantom sensations

Diagnosis

Physical examination to confirm limb absence and assess residual limb health. Review of medical history to determine the cause of amputation. Imaging may be used to evaluate residual bone or soft tissue if prosthetic fitting is planned.

Treatment Options

• Prosthetic limb fitting and training to restore mobility
• Physical therapy to strengthen remaining muscles and improve gait
• Pain management and psychological support for adjustment

Prognosis and Follow-Up

With appropriate prosthetic use and rehabilitation, patients can achieve improved mobility and independence. Regular follow-up is essential to monitor residual limb health, prosthetic fit, and address any complications.

Complications

• Residual limb pain or phantom limb sensations
• Skin breakdown or infection at the amputation site
• Psychological adjustment challenges
• Potential for prosthetic-related issues (e.g., fit, comfort)

Lifestyle & Prevention

• Maintain a healthy weight to reduce stress on the residual limb
• Engage in regular physical activity to strengthen remaining muscles
• Practice proper residual limb care to prevent infection
• Use assistive devices as recommended for safety

When to Seek Professional Help

Seek medical attention for signs of infection (e.g., redness, swelling, drainage), increased pain, or difficulty with prosthetic use. Consult a healthcare provider for adjustments to rehabilitation or prosthetic fitting.

Tips for Medical Coders

Document the specific level of amputation (above knee) and any contributing factors (e.g., trauma, surgery, disease) to support code assignment. Ensure the code aligns with the clinical documentation of limb absence and its cause.