S90.2 Contusion of toe with damage to nail

Name of the Condition

• Contusion of toe with damage to nail

Summary

A contusion of the toe with damage to the nail is a bruise resulting from blunt force trauma that affects both the soft tissues of the toe and the nail structure. This injury typically causes localized pain, swelling, and discoloration, with potential nail bed injury or subungual hematoma (blood under the nail). The condition involves damage to the nail, which may present as discoloration, lifting, or partial/complete nail loss.

Causes

Direct impact or trauma to the toe, such as stubbing it against a hard object, dropping a heavy item on it, or injuries during sports or physical activities. The force applied to the toe can damage both the underlying soft tissues and the nail, leading to the combined injury.

Risk Factors

• Participation in activities with a high risk of toe trauma, such as running, hiking, or contact sports.
• Wearing open-toed or poorly fitting footwear that exposes the toes to injury.
• Occupations involving physical labor or environments where foot injuries are more likely.
• Pre-existing conditions like reduced sensation or circulation in the feet, which may increase susceptibility to injury.

Symptoms

• Pain and tenderness around the affected toe.
• Localized swelling and discoloration (bruising) of the skin.
• Nail damage, including discoloration, lifting, or partial/complete nail loss.
• Possible difficulty walking or applying pressure on the toe.
• Subungual hematoma (blood under the nail) may be present.

Diagnosis

Physical examination by a healthcare provider to assess tenderness, swelling, discoloration, and nail integrity. A review of the patient’s history to determine the mechanism of injury. Imaging (e.g., X-rays) may be used to rule out fractures or other injuries, particularly if there is significant pain or deformity.

Treatment Options

• Resting the affected toe to avoid further injury.
• Applying ice to reduce pain and swelling.
• Elevating the foot to minimize swelling.
• Pain relief medications if needed.
• For severe nail damage, drainage of subungual hematoma or nail repair may be necessary.
• Protective footwear or padding to prevent additional trauma.

Prognosis and Follow-Up

Most contusions with nail damage heal within 1–3 weeks with proper care. Follow-up may be recommended if symptoms worsen, infection develops, or nail regrowth is abnormal. Severe nail bed injuries may require longer healing time or specialized care.

Complications

• Infection, particularly if the nail bed is damaged or the skin is broken.
• Chronic pain or sensitivity in the toe.
• Abnormal nail growth or permanent nail deformity.
• Subungual hematoma leading to increased pressure and pain.

Lifestyle & Prevention

• Wear properly fitting, closed-toe footwear during activities with a risk of toe injury.
• Use protective gear (e.g., toe guards) in sports or high-risk environments.
• Maintain good foot hygiene to reduce infection risk.
• Avoid walking barefoot in hazardous areas.

When to Seek Professional Help

Seek medical attention if there is severe pain, inability to bear weight, signs of infection (e.g., redness, pus), or if the nail is completely avulsed (removed). Immediate care is also recommended for significant swelling, discoloration, or suspected fracture.

Tips for Medical Coders

Document the presence of nail damage (e.g., subungual hematoma, nail bed injury, or nail loss) to support the use of code S90.2. Include details about the mechanism of injury, clinical findings (e.g., swelling, discoloration), and any treatment provided. Ensure the diagnosis aligns with the specific criteria for a contusion involving nail damage to accurately reflect the condition.