S60.420S Blister (nonthermal) of right index finger, sequela

Name of the Condition

• Common Name: Blister of the right index finger
• Medical Term: Nonthermal blister of right index finger, sequela

Summary

A nonthermal blister of the right index finger, sequela, refers to a residual or chronic fluid-filled skin lesion resulting from prior nonthermal trauma. This code (S60.420S) indicates a sequela, meaning the condition is a late effect of an earlier injury or event.

Causes

Nonthermal blisters on the index finger typically result from friction, pressure, or minor trauma. Common triggers include repetitive manual tasks, tight-fitting gloves, or contact with rough surfaces. The sequela form arises after the initial injury has healed but leaves a persistent lesion.

Risk Factors

• Repetitive hand movements or manual labor
• Poorly fitting gloves or sports equipment
• Prolonged exposure to friction or pressure
• Delayed or incomplete healing of the initial injury

Symptoms

• Persistent fluid-filled bump on the skin
• Tenderness or pain around the blister
• Redness or itching in the affected area
• Possible scarring or thickening of the skin

Diagnosis

Diagnosis is made through physical examination of the affected finger. Healthcare providers assess the blister’s appearance, duration, and history of prior trauma to confirm it as a sequela. No additional testing is usually required unless infection or other complications are suspected.

Treatment Options

• Protection: Covering with a sterile bandage to prevent further irritation.
• Topical treatments: Antiseptic creams or moisturizers to promote healing.
• Drainage: May be considered under medical advice if the blister is painful or persistent.
• Referral: To a specialist if the lesion does not resolve or shows signs of infection.

Prognosis and Follow-Up

Most nonthermal blisters, sequela, resolve with proper care, but some may persist or require ongoing management. Follow-up may be needed to monitor for infection, scarring, or functional impairment. Healing time varies based on the severity of the initial injury and individual factors.

Complications

• Infection of the blister or surrounding skin
• Scarring or permanent skin changes
• Reduced finger mobility or function
• Recurrence if the underlying cause is not addressed

Lifestyle & Prevention

• Use properly fitting gloves or protective gear during manual tasks.
• Avoid repetitive friction or pressure on the affected finger.
• Keep the skin moisturized to reduce irritation.
• Address any underlying occupational or activity-related risks.

When to Seek Professional Help

Seek medical attention if the blister shows signs of infection (e.g., increased redness, pus, fever), if pain is severe or worsening, or if the lesion does not improve with home care. Consult a provider if there is concern about scarring or functional impairment.

Tips for Medical Coders

Use code S60.420S for a nonthermal blister of the right index finger classified as a sequela. Document the relationship to the prior injury or event, as well as the chronic or residual nature of the lesion. Ensure the code aligns with the patient’s clinical presentation and history.