A nurse is reviewing the laboratory values of a client who has COPD. Which of the following findings should the nurse report to the provider?

A. WBC 13,000/mm3 is slightly elevated and might indicate an infection, but it is not critically high in the context of COPD. The nurse should still monitor the client for signs of infection but is unlikely to require immediate intervention. B. Potassium 3.7 mEq/L is within the normal range (3.5–5.0 mEq/L) and does not require reporting. C. Hgb 20 g/dL is elevated and should be reported. High hemoglobin levels can indicate dehydration, polycythemia, or other conditions related to chronic hypoxia, which is common in COPD. This value is above the normal range (12–18 g/dL for adults) and requires further evaluation. D. Iron 150 mcg/dL is within the normal range (50–170 mcg/dL for adults) and does not require reporting.