Strain of extensor musc/fasc/tend finger at wrs/hnd lv, init

This diagnosis code signifies a soft tissue injury to the extensor muscles, their surrounding fascia, or their tendons in any finger other than the thumb, occurring at the wrist or hand level. It indicates an overstretching or tearing of these structures, leading to pain and impaired finger extension. This code is specifically for the initial presentation and treatment of such an injury.

Use this code for patients presenting with acute pain, swelling, and difficulty extending a finger (excluding the thumb) following a sudden forceful movement, hyperextension, or direct trauma to the dorsal aspect of the hand or wrist. This is appropriate for the initial evaluation and management of a newly diagnosed extensor strain.

• Ensure the documentation specifies a strain (not a sprain, laceration, or rupture) of the extensor mechanism.
• Verify that the affected digit is any finger other than the thumb.
• Confirm this is the patient's first encounter for this specific injury; subsequent encounters will require a different seventh character.