M65.332 Trigger finger, left middle finger

Name of the Condition

• Trigger finger, left middle finger

Summary

Trigger finger, left middle finger is a condition where the left middle finger catches or locks in a bent position, often due to inflammation or thickening of the flexor tendon sheath. This can cause pain, stiffness, and difficulty straightening the affected finger. The condition may be acute or chronic and typically affects the left middle finger specifically.

Causes

Inflammation or thickening of the flexor tendon sheath, often due to repetitive motion or overuse. Underlying conditions such as diabetes or rheumatoid arthritis. Trauma to the hand or finger. Age-related degenerative changes in the tendon or sheath.

Risk Factors

• Repetitive hand or finger movements (e.g., typing, gripping tools)
• Diabetes or other metabolic disorders
• Rheumatoid arthritis or other inflammatory conditions
• Female gender and increasing age
• Prior hand or finger injuries

Symptoms

• Finger catching or locking in a bent position
• Pain or tenderness at the base of the finger
• Stiffness, especially in the morning
• A popping or clicking sensation when moving the finger
• Difficulty straightening the finger without assistance

Diagnosis

Diagnosis typically involves a physical examination to assess finger movement and tenderness. The provider may ask the patient to open and close the hand to observe locking or catching.

Treatment Options

• Rest and activity modification to reduce strain on the finger
• Nonsteroidal anti-inflammatory drugs (NSAIDs) for pain and inflammation
• Corticosteroid injections to reduce swelling
• Physical therapy to improve finger mobility
• In severe cases, surgical release of the tendon sheath may be necessary

Prognosis and Follow-Up

Most cases improve with conservative treatment, though recovery may take weeks to months. Follow-up appointments monitor progress and adjust treatment as needed. Surgical intervention often provides long-term relief but requires postoperative care.

Complications

• Persistent stiffness or locking despite treatment
• Tendon rupture or damage
• Infection (rare, associated with injections or surgery)
• Recurrence of symptoms

Lifestyle & Prevention

• Use ergonomic tools to reduce repetitive strain
• Take frequent breaks during hand-intensive activities
• Perform finger-stretching exercises to maintain flexibility
• Manage underlying conditions like diabetes to reduce risk

When to Seek Professional Help

Seek care if symptoms worsen, interfere with daily activities, or do not improve with home care. Immediate attention is needed for severe pain, swelling, or inability to move the finger.

Tips for Medical Coders

Document the specific finger (left middle) and laterality (left) to ensure accurate coding. Include details on symptom onset, duration, and any prior treatments to support code specificity.