M76.50 Patellar tendinitis, unspecified knee

Name of the Condition

Patellar Tendinitis, Unspecified Knee

Summary

Patellar tendinitis is an inflammatory condition affecting the tendon connecting the kneecap (patella) to the shinbone. It typically results from overuse or repetitive stress, leading to pain and functional impairment in the knee.

Causes

Patellar tendinitis is primarily caused by repetitive stress or overuse of the knee joint, often from activities involving jumping, running, or sudden changes in activity intensity. This can lead to microtears and inflammation in the tendon.

Risk Factors

• Participation in sports requiring frequent knee flexion or jumping, such as basketball or volleyball.
• Tight leg muscles or muscular imbalances around the knee.
• Inadequate warm-up or improper training techniques.
• Sudden increases in physical activity without gradual conditioning.

Symptoms

• Pain and tenderness around the kneecap, especially during movement.
• Swelling or stiffness in the knee area.
• Pain that worsens with jumping, running, or kneeling.
• Weakness or reduced range of motion in the knee.

Diagnosis

Diagnosis involves a physical examination to assess knee movement, tenderness, and swelling. Imaging tests like ultrasound or MRI may be used to evaluate tendon integrity and rule out other conditions.

Treatment Options

• Rest and activity modification to reduce stress on the knee.
• Ice application to alleviate pain and inflammation.
• Physical therapy focusing on stretching and strengthening exercises.
• Nonsteroidal anti-inflammatory drugs (NSAIDs) for pain relief.
• In severe cases, corticosteroid injections or surgical intervention may be considered.

Prognosis and Follow-Up

Most cases of patellar tendinitis improve with conservative treatment, though recovery may take several weeks to months. Follow-up care often includes gradual return to activity and ongoing physical therapy to prevent recurrence.

Complications

Untreated or severe cases may lead to chronic pain, tendon degeneration, or rupture. Persistent symptoms may require further evaluation to rule out other knee conditions.

Lifestyle & Prevention

• Maintain proper biomechanics during physical activities.
• Incorporate regular stretching and strengthening exercises for the knee and leg muscles.
• Avoid sudden increases in activity intensity.
• Use appropriate footwear and equipment for sports or exercise.

When to Seek Professional Help

Seek medical attention if pain is severe, persistent, or worsening, or if there is significant swelling, inability to bear weight, or reduced range of motion in the knee.

Tips for Medical Coders

Document the affected knee (unspecified in this code) and specify if laterality becomes known. Ensure clinical notes support the diagnosis and exclude other knee conditions. Use this code when the knee affected is not specified or documented.