S82.5 Fracture of medial malleolus

Name of the Condition

• Fracture of medial malleolus

Summary

A fracture of the medial malleolus involves a break in the inner bony prominence of the ankle, part of the tibia. This injury may range from a simple crack to a displaced fracture, depending on the force of impact and bone integrity. The severity and treatment approach depend on the fracture pattern and associated joint involvement.

Causes

Fractures of the medial malleolus typically result from direct trauma, such as falls, twisting injuries, or high-impact events like sports collisions or motor vehicle accidents. Sudden rotational forces or excessive stress on the ankle joint can also lead to this type of fracture.

Risk Factors

• Participation in activities with a high risk of ankle injury, such as contact sports or gymnastics.
• Osteoporosis or other bone-weakening conditions that reduce bone density.
• Previous ankle injuries or surgeries that may weaken the joint.
• Age-related bone loss, particularly in older adults.

Symptoms

• Pain and swelling localized to the inner ankle.
• Difficulty bearing weight on the affected foot.
• Bruising and tenderness at the fracture site.
• Possible deformity or misalignment of the ankle if the fracture is displaced.

Diagnosis

Diagnosis involves a physical examination to assess pain, swelling, and range of motion. Imaging studies, such as X-rays or CT scans, are used to confirm the fracture, evaluate bone alignment, and rule out associated injuries to the ankle joint or surrounding structures.

Treatment Options

• Immobilization with a cast, brace, or splint to stabilize the fracture and promote healing.
• Pain management with medications or ice therapy to reduce discomfort and swelling.
• Surgical intervention, such as internal fixation with screws or plates, may be necessary for displaced fractures or unstable joint alignment.
• Physical therapy to restore strength, mobility, and function after healing.

Prognosis and Follow-Up

Most fractures of the medial malleolus heal well with appropriate treatment, though recovery time varies based on fracture severity and patient factors. Follow-up appointments are typically scheduled to monitor healing progress, assess functional recovery, and adjust treatment as needed. Return to normal activities depends on the stability of the fracture and adherence to rehabilitation guidelines.

Complications

• Delayed healing or nonunion, particularly in cases with poor blood supply or severe displacement.
• Post-traumatic arthritis, which may develop if the ankle joint is not properly aligned.
• Nerve or blood vessel damage, though this is less common.
• Chronic pain or stiffness in the ankle joint.

Lifestyle & Prevention

• Wear appropriate footwear and use protective gear during high-risk activities.
• Maintain bone health through a balanced diet rich in calcium and vitamin D.
• Avoid sudden twisting motions or uneven surfaces that increase ankle injury risk.
• Strengthen ankle muscles and improve balance through targeted exercises.

When to Seek Professional Help

Seek immediate medical attention if you experience severe ankle pain, inability to bear weight, visible deformity, or signs of nerve or vascular compromise (e.g., numbness, coldness, or discoloration). Prompt evaluation is essential to prevent complications and ensure proper treatment.

Tips for Medical Coders

When coding for a fracture of the medial malleolus, ensure documentation specifies the fracture type (e.g., displaced, nondisplaced), laterality (left/right/bilateral), and any associated injuries or complications. Note the encounter type (initial, subsequent, or sequela) and whether the fracture is open or closed, as these details impact code selection. Verify that the code aligns with the clinical findings and treatment provided.