Physiology Patient’s lab value of Na+ 137, K+4, Urea 54, Bicarbonate 15, Phosphate 3, Chloride 110, Calcium 10. Calculate the Anion gap? A 12 B 16 C 10 D 8 💡 Explanation Patient's lab value of Na+ 137, K+4, Urea 54, Bicarbonate 15, Phosphate 3, Chloride 110, Calcium 10. Calculate the Anion gap? ✓ Correct Answer: A. 12