M00.261 Other streptococcal arthritis, right knee

Name of the Condition

• Other streptococcal arthritis, right knee

Summary

Other streptococcal arthritis, right knee, is a bacterial infection of the right knee joint caused by streptococcal bacteria other than Streptococcus pneumoniae. It results in joint inflammation and can lead to rapid joint damage if not treated promptly. This condition requires immediate medical attention to prevent complications.

Causes

Other streptococcal arthritis, right knee, is caused by infection with streptococcal bacteria (excluding Streptococcus pneumoniae) in the right knee joint space. The infection can spread through the bloodstream from a distant site, such as the skin or respiratory tract, or via direct inoculation into the joint.

Risk Factors

• Immunocompromised states (e.g., diabetes, HIV, chemotherapy).
• Pre-existing joint conditions (e.g., rheumatoid arthritis).
• Recent joint surgery or invasive procedures.
• Skin infections or bacteremia.
• Intravenous drug use.

Symptoms

• Severe right knee joint pain, swelling, and warmth.
• Fever and chills.
• Reduced range of motion in the affected knee.
• Fatigue and malaise.
• Redness over the knee joint.

Diagnosis

Diagnosis involves joint aspiration to analyze synovial fluid for bacteria, blood cultures to identify systemic infection, and imaging (e.g., X-rays, MRI) to assess joint damage. Clinical evaluation and patient history are also critical for confirming the diagnosis.

Treatment Options

Treatment typically includes intravenous antibiotics to target the streptococcal infection, often followed by oral antibiotics. Joint drainage may be necessary to reduce pressure and remove infected fluid. Pain management and physical therapy may support recovery.

Prognosis and Follow-Up

With prompt treatment, most patients recover without long-term joint damage. Follow-up care includes monitoring for recurrence, assessing joint function, and adjusting treatment as needed. Delayed care can increase the risk of complications.

Complications

Potential complications include joint destruction, chronic arthritis, sepsis, or spread of infection to other areas. Early intervention reduces these risks.

Lifestyle & Prevention

Maintain good hygiene to prevent skin infections, manage chronic conditions (e.g., diabetes), and avoid invasive procedures when possible. Promptly treat streptococcal infections elsewhere in the body.

When to Seek Professional Help

Seek immediate medical attention if you experience severe knee pain, swelling, fever, or reduced mobility. Early diagnosis improves outcomes.

Tips for Medical Coders

Document the specific joint (right knee) and confirm the causative organism is streptococcal (excluding Streptococcus pneumoniae). Include clinical details supporting the diagnosis, such as synovial fluid analysis or imaging findings, to ensure accurate coding.