ICD Code M66.359

ICD code M66.359 is used to classify a medical condition where there is a spontaneous rupture of the flexor tendons in an unspecified thigh. This means that the tendons responsible for bending or flexing the leg at the knee have torn without any apparent external trauma or injury, and the specific location within the thigh is not detailed. This code is part of the International Classification of Diseases (ICD) system, which is used by healthcare providers to document and categorize diagnoses for billing and treatment purposes.

When to use the ICD code for spontaneous rupture of flexor tendons, unspecified thigh:

1. Clinical Presentation
- Patient reports sudden onset of pain in the thigh region.
- Patient experiences a loss of function or weakness in the affected limb.

2. Physical Examination Findings
- Tenderness and swelling localized to the thigh.
- Palpable defect or gap in the tendon upon examination.
- Limited range of motion in the knee or hip joint.

3. Diagnostic Imaging
- MRI or ultrasound confirms the presence of a tendon rupture.
- Imaging shows fluid accumulation or hematoma in the thigh area.

4. Mechanism of Injury
- History of acute trauma or excessive force applied to the thigh.
- No prior history of tendon pathology or chronic conditions affecting tendon integrity.

5. Exclusion of Other Conditions
- Ruling out other potential causes of thigh pain, such as fractures, muscle tears, or ligament injuries.
- Confirmation that the rupture is spontaneous and not due to a surgical procedure or external intervention.

6. Patient Demographics
- Consideration of age, activity level, and overall health status that may predispose the patient to tendon injuries.

7. Symptom Duration
- Symptoms have been present for a short duration, indicating an acute injury rather than a chronic condition.

By adhering to these diagnostic criteria and symptoms, healthcare providers can accurately determine when to apply the appropriate ICD code for spontaneous rupture of flexor tendons in the unspecified thigh.

For the ICD code M66.359, which pertains to the spontaneous rupture of flexor tendons in the unspecified thigh, the relevant CPT codes that may be applicable for treatment include:

1. 27385 - Suture of infrapatellar tendon.

2. 27386 - Suture of quadriceps or hamstring muscle rupture; primary.

3. 27387 - Suture of quadriceps or hamstring muscle rupture; secondary.

4. 27650 - Repair, primary, open or percutaneous, of ruptured Achilles tendon.

5. 27652 - Repair, primary, open or percutaneous, with graft, of ruptured Achilles tendon.

6. 27654 - Repair, secondary, Achilles tendon, with or without graft.

These CPT codes are examples of procedures that might be considered for addressing tendon ruptures in the thigh area, depending on the specific clinical scenario and physician's assessment. Always consult with a healthcare professional or coding specialist to determine the most appropriate codes for a specific case.

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