Monoplegia of upper limb affecting left nondominant side

This diagnosis code signifies paralysis affecting a single upper extremity, specifically the left arm, in an individual whose left side is not their dominant side. This condition results in significant impairment of motor function and strength in the affected limb. It indicates a neurological deficit leading to the inability to voluntarily move the left nondominant upper limb.

Apply this code when documentation clearly states monoplegia of the left upper limb and specifies that the left side is the patient's nondominant side. This is typically used for conditions like stroke, spinal cord injury, or other neurological disorders causing isolated paralysis of the left arm in a right-handed individual. Supporting documentation should include neurological exam findings detailing the paralysis and laterality/dominance information.

• Always verify laterality (left vs. right) and dominance (dominant vs. nondominant) from the physician's documentation.
• Do not use this code if the paralysis affects more than one limb (e.g., hemiplegia, paraplegia, quadriplegia).
• Ensure the documentation specifies "nondominant" for the left side; otherwise, a different G83.2x code may be more appropriate.