M65.171 Other infective (teno)synovitis, right ankle and foot

Name of the Condition

• Other infective (teno)synovitis, right ankle and foot
• ICD-10 Code: M65.171

Summary

This condition involves an infection of the synovial sheath surrounding tendons (tenosynovitis) or the synovial membrane of the right ankle and foot. It typically causes localized inflammation, pain, and functional impairment in the affected area.

Causes

The condition is most commonly caused by bacterial infections, though viral or fungal pathogens may also be involved. It can arise from direct inoculation (e.g., trauma, surgery) or hematogenous spread from a distant infection.

Risk Factors

• Recent ankle or foot injuries (e.g., lacerations, fractures)
• Immunocompromised states (e.g., diabetes, HIV)
• Poor wound hygiene or delayed treatment of minor injuries
• Occupational or recreational exposure to pathogens (e.g., contaminated environments, animal bites)
• Prior ankle or foot surgery or invasive procedures

Symptoms

• Localized swelling, warmth, and tenderness over the affected tendon or joint
• Pain with movement or pressure
• Reduced range of motion or stiffness in the right ankle or foot
• Systemic signs (e.g., fever, chills) if infection is severe or widespread
• Possible drainage or pus if the infection is advanced

Diagnosis

Diagnosis involves a physical exam to assess inflammation and mobility. Imaging (e.g., MRI, ultrasound) visualizes soft tissue changes, while laboratory tests (e.g., synovial fluid analysis, cultures) identify infectious agents.

Treatment Options

• Antibiotics are the primary treatment for bacterial infections. Surgical drainage or debridement may be necessary for abscesses or severe cases.
• Rest and immobilization of the affected area to reduce strain.
• Pain management with analgesics as needed.
• Physical therapy to restore mobility and strength after infection resolution.

Prognosis and Follow-Up

With prompt treatment, most cases resolve without long-term complications. Follow-up may include monitoring for recurrence or residual stiffness. Delayed treatment can lead to chronic pain or functional impairment.

Complications

• Chronic tenosynovitis or joint damage
• Spread of infection to surrounding tissues or bones
• Systemic sepsis in severe cases
• Persistent pain or reduced mobility

Lifestyle & Prevention

• Maintain good wound hygiene, especially after injuries.
• Seek timely care for minor cuts or punctures to the ankle or foot.
• Manage underlying conditions (e.g., diabetes) to reduce infection risk.
• Avoid activities that increase exposure to pathogens in high-risk environments.

When to Seek Professional Help

Consult a healthcare provider if you experience persistent swelling, pain, or warmth in the right ankle or foot, especially with fever or difficulty moving. Seek immediate care for signs of spreading infection (e.g., red streaks, severe pain).

Tips for Medical Coders

Document the specific anatomical site (right ankle and foot) and confirm infective etiology. Ensure clinical notes support the diagnosis, including signs of infection (e.g., swelling, fever) and any diagnostic tests (e.g., cultures). Use M65.171 for cases localized to the right ankle and foot; avoid this code for unspecified or bilateral sites.