Strain of intrinsic musc/fasc/tend r thm at wrs/hnd lv, init

This code signifies a non-traumatic overstretching or tearing of the small muscles, their surrounding connective tissue, or the tendons within the right thumb, specifically at the wrist and hand level. This injury does not involve a fracture or dislocation but rather damage to the soft tissues responsible for thumb movement and stability.

Apply this code when documenting an initial encounter for a patient presenting with pain, swelling, and limited range of motion in the right thumb, consistent with a muscle or tendon strain. This would include injuries sustained from repetitive motions, sudden forceful movements, or overexertion impacting the intrinsic structures of the thumb.

• Ensure the documentation clearly specifies "right thumb" and "strain" of intrinsic structures.
• Verify that the encounter is the initial treatment for this specific injury.
• Distinguish from sprains (ligamentous injury) or more severe injuries like ruptures.