Final answer:
The nurse should report the client's low Prealbumin level of 8 mg/dL to the provider as it indicates potential malnutrition or a systemic illness, which is a concern identified in a comprehensive nutritional assessment.
Step-by-step explanation:
The nurse should report the finding of a Prealbumin level of 8 mg/dL to the provider. A prealbumin level this low is below the normal range (typically 16-40 mg/dL for adults) and can be indicative of malnutrition or a severe systemic illness. The other lab results, including a WBC count of 6,000/mm³, Sodium at 139 mEq/L, and Thyroxine (T4) at 9.2 mcg/dL, are within their respective normal ranges and are not typically alarming. A comprehensive nutritional assessment would consider prealbumin levels as an important indicator of the client's nutritional status.