M65.079 Abscess of tendon sheath, unspecified ankle and foot

Name of the Condition

• Abscess of tendon sheath, unspecified ankle and foot

Summary

Abscess of the tendon sheath in the unspecified ankle and foot is a localized infection characterized by pus accumulation within the protective sheath surrounding tendons in this region. This condition can cause pain, swelling, and impaired movement if not treated promptly.

Causes

Bacterial infections are the primary cause, often resulting from trauma, puncture wounds, or the spread of infection from other body areas. Less commonly, it may arise from systemic infections or direct inoculation of bacteria into the tendon sheath.

Risk Factors

• Recent injuries or penetrative wounds to the ankle or foot
• Pre-existing conditions like diabetes or immune deficiencies
• Poor wound hygiene, especially after minor injuries
• Occupational or recreational activities involving repetitive ankle or foot use

Symptoms

• Swelling and redness around the affected tendon sheath
• Pain or tenderness, particularly with movement
• Warmth in the affected area
• Possible fever or chills indicating systemic infection
• Limited range of motion in the ankle or foot

Diagnosis

Diagnosis involves a physical examination to assess tenderness, swelling, and movement limitations. Blood tests may identify infectious agents, and imaging studies like MRI or ultrasound can confirm abscess presence.

Treatment Options

• Antibiotic therapy to address bacterial infection
• Surgical intervention may be necessary to drain the abscess

Prognosis and Follow-Up

With timely treatment, most cases resolve without long-term issues. Follow-up care ensures infection resolution and monitors for recurrence.

Complications

• Spread of infection to surrounding tissues or bloodstream
• Tendon damage or rupture
• Chronic pain or functional impairment
• Systemic sepsis in severe cases

Lifestyle & Prevention

• Clean and properly care for minor wounds to the ankle or foot
• Manage underlying conditions like diabetes to reduce infection risk
• Avoid activities that increase injury risk to the ankle or foot
• Seek prompt medical attention for signs of infection

When to Seek Professional Help

Consult a healthcare provider if you experience persistent pain, swelling, redness, or fever in the ankle or foot, as these may indicate an abscess or spreading infection.

Tips for Medical Coders

Document the specific location (unspecified ankle and foot) and confirm the diagnosis of an abscess within the tendon sheath. Ensure clinical notes support the absence of a specified side (right/left) to justify the use of this code.