S83.222 Peripheral tear of medial meniscus, current injury, left knee

Name of the Condition

• Peripheral tear of medial meniscus, current injury, left knee

Summary

A peripheral tear of the medial meniscus is a knee injury involving a tear along the outer edge of the medial meniscus, a C-shaped cartilage structure in the left knee. This type of tear is often associated with acute trauma or degenerative changes and may cause pain, swelling, or functional impairment.

Causes

Trauma to the knee from twisting, pivoting, or sudden stops. Degenerative changes in the knee joint over time, leading to weakening of the meniscus.

Risk Factors

• Participation in sports or activities involving rapid changes in direction.
• Older age, as cartilage naturally degenerates with time.
• Previous knee injuries that may compromise joint stability.
• Obesity, which increases stress on the knee joint.

Symptoms

• Pain localized to the inner side of the knee.
• Swelling or stiffness in the knee joint.
• Difficulty fully bending or straightening the knee.
• A popping or clicking sensation during movement.
• Sensation of the knee locking or catching.

Diagnosis

Physical examination to assess range of motion, stability, and tenderness. Imaging tests, such as MRI, to visualize the tear and determine its location and severity. In some cases, arthroscopy may be used for direct visualization and confirmation.

Treatment Options

• Non-surgical management, including rest, ice, compression, and elevation (RICE), physical therapy, and anti-inflammatory medications.
• Surgical intervention, such as arthroscopic repair or partial meniscectomy, may be considered for severe or persistent cases.

Prognosis and Follow-Up

Prognosis depends on the tear's severity, treatment approach, and patient adherence to rehabilitation. Most patients recover with appropriate care, but some may experience long-term joint instability or arthritis. Follow-up appointments monitor healing and functional recovery.

Complications

• Persistent knee pain or instability.
• Increased risk of osteoarthritis in the affected knee.
• Re-tear of the meniscus or other knee injuries.

Lifestyle & Prevention

• Strengthening exercises for the knee and surrounding muscles.
• Proper warm-up and technique during physical activities.
• Maintaining a healthy weight to reduce joint stress.
• Using protective gear during high-risk sports.

When to Seek Professional Help

Seek medical attention if knee pain is severe, swelling persists, or the knee locks or catches during movement. Prompt evaluation is important for accurate diagnosis and treatment.

Tips for Medical Coders

Document the location (left knee), injury type (peripheral tear of medial meniscus), and current injury status. Ensure clinical documentation supports the specificity of the tear and laterality to justify the code.