S66.125 Laceration of flexor muscle, fascia and tendon of left ring finger at wrist and hand level

Name of the Condition

• Laceration of flexor muscle, fascia and tendon of left ring finger at wrist and hand level
• ICD-10 Code: S66.125

Summary

This condition involves a laceration (cut or tear) of the flexor muscle, fascia, or tendon of the left ring finger at the wrist and hand level. These structures are critical for finger flexion and hand function. The injury typically results from trauma that disrupts the integrity of these tissues, potentially affecting movement and strength.

Causes

Common causes include penetrating injuries (e.g., cuts from sharp objects), direct trauma (e.g., falls or blows to the hand), or forceful movements that tear the flexor structures. The laceration may involve partial or complete disruption of the muscle, fascia, or tendon.

Risk Factors

• Participation in activities with a high risk of hand injury (e.g., manual labor, sports, or handling sharp tools).
• Lack of protective gear during high-risk tasks.
• Previous injuries to the fingers, wrist, or hand.
• Use of equipment that increases the risk of laceration.

Symptoms

• Pain, swelling, or tenderness in the affected finger or wrist.
• Visible signs of injury, such as cuts, bleeding, or deformity.
• Reduced range of motion or weakness in the finger.
• Difficulty performing tasks requiring grip or dexterity.
• Possible numbness or tingling if nerves are involved.

Diagnosis

Physical examination typically assesses the injury site for lacerations, swelling, or deformity. Functional tests evaluate finger flexion and strength. Imaging (e.g., ultrasound or MRI) may be used to assess tendon or muscle damage. Nerve function is often checked to rule out associated injury.

Treatment Options

Treatment depends on the severity of the laceration. Minor injuries may be managed with wound care, immobilization, and pain management. Severe or complete tears often require surgical repair of the flexor structures, followed by rehabilitation to restore function. Antibiotics may be prescribed for open wounds to prevent infection.

Prognosis and Follow-Up

Prognosis varies based on injury severity and treatment. Early intervention improves outcomes. Follow-up care includes monitoring for healing, assessing functional recovery, and guiding rehabilitation. Physical therapy is often recommended to restore strength and range of motion.

Complications

Potential complications include infection, tendon re-rupture, scar tissue formation, chronic pain, or reduced finger mobility. Nerve damage may lead to numbness or weakness. Delayed treatment increases the risk of long-term functional impairment.

Lifestyle & Prevention

Avoid high-risk activities without protective gear (e.g., gloves). Use proper tools and techniques during manual tasks. Promptly treat minor hand injuries to prevent worsening. Strengthening exercises and ergonomic practices may support recovery and reduce future injury risk.

When to Seek Professional Help

Seek immediate care for deep lacerations, uncontrolled bleeding, or inability to move the finger. Consult a healthcare provider if pain, swelling, or weakness persists after initial injury or if signs of infection (e.g., redness, pus) develop.

Tips for Medical Coders

Document the specific finger (left ring), anatomical structures involved (flexor muscle, fascia, tendon), and injury location (wrist and hand level). Include details on trauma mechanism, wound characteristics, and any associated nerve or vascular involvement to support code assignment. Ensure documentation aligns with the specificity of S66.125.