ICD Code M66.361

ICD code M66.361 is used to classify and document the medical condition known as the spontaneous rupture of flexor tendons in the right lower leg. This code is part of the International Classification of Diseases, 10th Revision (ICD-10), which is a standardized system used by healthcare providers to ensure consistent documentation and billing. The condition described by this code involves the sudden tearing or breaking of the tendons responsible for bending the foot or toes, occurring without any external trauma or injury. This can lead to pain, swelling, and difficulty in movement, requiring medical evaluation and potentially surgical intervention. Proper coding of this condition is crucial for accurate medical records, treatment planning, and insurance reimbursement.

When to use the ICD code for spontaneous rupture of flexor tendons in the right lower leg, consider the following diagnostic criteria and symptoms:

1. Clinical Presentation
- Sudden onset of pain in the right lower leg.
- Swelling or bruising in the area of the flexor tendons.

2. Physical Examination Findings
- Tenderness upon palpation of the flexor tendon region.
- Limited range of motion in the affected area.

3. Functional Impairment
- Difficulty in performing activities that require flexion of the toes or foot.
- Inability to bear weight on the affected leg.

4. Imaging Studies
- MRI or ultrasound confirming the rupture of the flexor tendons.
- X-rays to rule out associated fractures or other injuries.

5. Patient History
- Recent history of trauma or injury to the lower leg.
- Previous tendon injuries or surgeries in the same area.

6. Associated Symptoms
- Numbness or tingling in the toes or foot.
- Weakness in the ability to flex the toes or foot.

7. Response to Conservative Treatment
- Lack of improvement with rest, ice, compression, and elevation (RICE) methods.
- Persistent symptoms despite physical therapy interventions.

These criteria should guide healthcare providers in determining the appropriate use of the ICD code for this specific condition.

For the ICD code M66.361, which pertains to the spontaneous rupture of flexor tendons in the right lower leg, the relevant CPT codes that may be applicable for treatment include:

1. 27650 - Repair, primary, open or percutaneous, of ruptured Achilles tendon.

2. 27652 - Repair, primary, open or percutaneous, with graft (includes obtaining graft), of ruptured Achilles tendon.

3. 27654 - Repair, secondary, Achilles tendon, with or without graft.

4. 27658 - Repair, flexor tendon, leg; primary, without graft, each tendon.

5. 27659 - Repair, flexor tendon, leg; secondary, with or without graft, each tendon.

6. 27664 - Repair, extensor tendon, leg; primary, without graft, each tendon.

7. 27665 - Repair, extensor tendon, leg; secondary, with or without graft, each tendon.

These CPT codes are used to describe the surgical procedures that may be performed to repair tendon ruptures in the lower leg, including both primary and secondary repairs, with or without the use of grafts. It's important for healthcare providers to select the appropriate CPT code based on the specific procedure performed to ensure accurate billing and reimbursement.

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