S60.428A Blister (nonthermal) of other finger, initial encounter

Name of the Condition

• Common Name: Blister (nonthermal) of other finger
• Medical Term: Nonthermal blister of other finger

Summary

A nonthermal blister of other finger is a fluid-filled pocket on the skin resulting from friction, pressure, or minor trauma. It is classified under the ICD code S60.428A, indicating it is a specific superficial injury to a finger other than the index, middle, ring, or little finger, and is documented as an initial encounter.

Causes

Nonthermal blisters on other fingers are typically caused by repetitive friction or pressure. Common triggers include manual tasks, tight-fitting gloves, or contact with rough surfaces. They may also result from skin reactions to irritants or minor trauma.

Risk Factors

• Repetitive hand movements or manual labor
• Poorly fitting gloves or accessories
• Exposure to abrasive materials or chemicals
• Participation in activities with frequent hand use

Symptoms

• Fluid-filled bump on the skin
• Tenderness or pain around the blister
• Redness or mild swelling in the affected area

Diagnosis

Diagnosis is typically made through physical examination of the affected finger. Healthcare providers assess the blister’s appearance, size, and surrounding tissue. Imaging is rarely needed unless deeper tissue damage or infection is suspected.

Treatment Options

• Protection: Covering with a sterile bandage to prevent further irritation.
• Drainage under medical advice if painful or persistent.
• Topical ointments to promote healing and prevent infection.

Prognosis and Follow-Up

Most nonthermal blisters heal within 1–2 weeks with proper care. Follow-up may be recommended if symptoms worsen, signs of infection develop, or the blister does not improve.

Complications

• Infection (e.g., cellulitis)
• Delayed healing due to repeated friction
• Scarring if the blister is ruptured or improperly managed

Lifestyle & Prevention

• Wear well-fitting gloves during manual tasks.
• Use protective gear for activities involving friction.
• Keep hands moisturized to reduce skin vulnerability.
• Avoid prolonged exposure to irritants or rough surfaces.

When to Seek Professional Help

Seek care if the blister shows signs of infection (e.g., pus, increased redness, fever), is extremely painful, or does not improve after a week of home care.

Tips for Medical Coders

Document the specific finger affected (other than index, middle, ring, or little) and confirm the encounter is initial. Ensure clinical notes support the nonthermal cause and absence of deeper tissue damage.