Final answer:
Hyperactive deep tendon reflexes should be reported to the provider immediately in a client with Grave's disease. This can be a sign of thyroid storm, a life-threatening complication of Grave's disease characterized by severe hyperthyroidism.
Step-by-step explanation:
In a client admitted to the hospital with a diagnosis of Grave's disease, the finding that should be reported to the provider immediately is hyperactive deep tendon reflexes. Hyperactive deep tendon reflexes can be a sign of thyroid storm, a life-threatening complication of Grave's disease characterized by severe hyperthyroidism. It is important to report this finding promptly so that appropriate treatment can be initiated.