S42.263B Displaced fracture of lesser tuberosity of unspecified humerus, initial encounter for open fracture

Name of the Condition

• Displaced fracture of lesser tuberosity of unspecified humerus, initial encounter for open fracture (ICD Code: S42.263B)

Summary

This condition involves a displaced fracture of the lesser tuberosity, a bony prominence on the humerus near the shoulder joint, with an open (compound) fracture. The fracture is characterized by bone fragment separation and exposure of the fracture site to the external environment, which increases infection risk. The lesser tuberosity serves as an attachment point for the subscapularis muscle, and displacement may affect muscle function or joint stability.

Causes

Displaced open fractures of the lesser tuberosity typically result from high-energy trauma, such as motor vehicle accidents, falls from significant heights, or forceful direct impacts to the shoulder. Open fractures occur when the fractured bone pierces the skin or when external forces create an open wound at the fracture site.

Risk Factors

• Advanced age and osteoporosis, which reduce bone density.
• Participation in high-impact activities or contact sports.
• Previous fractures or bone disorders that weaken the skeletal structure.
• Trauma involving significant force or velocity.

Symptoms

• Intense pain at the shoulder or upper arm.
• Visible open wound at the fracture site.
• Swelling, bruising, and deformity.
• Inability to move the arm or bear weight.
• Numbness or tingling in the hand or fingers if nerve involvement occurs.
• Possible signs of infection, such as redness, warmth, or drainage from the wound.

Diagnosis

Physical examination to assess pain, range of motion, deformity, and wound characteristics. Imaging tests, including X-rays, to visualize the fracture pattern, displacement, and open wound involvement. CT scans or MRIs may be used for detailed assessment of complex fractures or soft tissue damage. Evaluation of the wound for contamination or infection is critical.

Treatment Options

• Immediate wound care and irrigation to reduce infection risk.
• Surgical intervention to realign and stabilize the fracture, often using plates, screws, or pins.
• Antibiotics to prevent or treat infection.
• Pain management and immobilization with a sling or brace.
• Physical therapy to restore range of motion and strength after healing.

Prognosis and Follow-Up

Prognosis depends on fracture severity, treatment success, and absence of complications. Most patients recover function with appropriate treatment, but open fractures carry a higher risk of infection or delayed healing. Follow-up appointments monitor healing, wound status, and rehabilitation progress. Long-term follow-up may be needed for persistent pain or functional limitations.

Complications

• Infection at the fracture site or wound.
• Nonunion or malunion of the fracture.
• Nerve or blood vessel damage.
• Shoulder stiffness or reduced range of motion.
• Chronic pain or arthritis in the shoulder joint.

Lifestyle & Prevention

• Use protective gear during high-risk activities.
• Maintain bone health through adequate calcium and vitamin D intake.
• Avoid falls by modifying home environments (e.g., removing tripping hazards).
• Engage in strength training to support bone and muscle health.

When to Seek Professional Help

Seek immediate medical attention for severe pain, visible deformity, open wounds, or inability to move the arm. Contact a healthcare provider if symptoms worsen, signs of infection develop (e.g., fever, increased redness), or mobility does not improve with treatment.

Tips for Medical Coders

Document the fracture as displaced and open, with specification of the initial encounter. Include details on wound characteristics, treatment provided, and any associated complications. Ensure alignment with ICD-10-CM coding guidelines for open fractures and anatomical site specificity.