ICD Code M65.4

ICD code M65.4 is radial styloid tenosynovitis, also known as de Quervain's tenosynovitis, which refers to inflammation of the tendons on the thumb side of the wrist.

1. Pain and tenderness localized over the radial (thumb) side of the wrist, especially near the base of the thumb

2. Swelling in the area of the radial styloid process

3. Positive Finkelstein’s test (pain elicited when the thumb is grasped in the palm and the wrist is ulnarly deviated)

4. Difficulty or pain with thumb movement, particularly with grasping or pinching

5. Crepitus or a catching sensation with thumb or wrist movement

6. Absence of systemic symptoms such as fever or generalized joint pain

7. No evidence of fracture, arthritis, or other underlying wrist pathology on imaging

Relevant CPT codes for ICD code M65.4 include:

- 20550 (Injection(s); single tendon sheath, or ligament, aponeurosis)

- 26055 (Tendon sheath incision, e.g., for trigger finger)

- 25115 (Excision of tendon sheath, wrist, flexor or extensor, single compartment)

- 25118 (Excision of tendon sheath, wrist, flexor or extensor, each additional compartment)

- 99201–99215 (Evaluation and management services, depending on visit complexity)

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