Table 1.

Patient’s Initial Laboratory Values After His First Endocrinology Consultation

Test	8:30 am	Reference range
Glucose	97 mg/dL	70-99 mg/dL
Blood urea nitrogen	19 mg/dL	6-20 mg/dL
Creatinine	0.78 mg/dL	0.76-1.27 mg/dL
Sodium	138 mEq/L	134-144 mEq/L
Potassium	4.6 mEq/L	3.5-5.2 mEq/L
Chloride	104 mEq/L	96-106 mEq/L
Carbon dioxide	26 mEq/L	20-29 mEq/L
Calcium	9.4 mg/L	8.7-10.2 mg/dL
Acetone blood	None detected	None detected
Adrenocorticotropic hormone	20 pg/mL	6-50 pg/mL
Total cortisol	13.4 μg/dL	7-9 am: 4.0-22.0 μg/dL
Insulin	7.8 μIU/mL	2-21 μIU/ML
Proinsulin	39.1 pmol/L	≤18.8 pmol/L
C-peptide	1.67 ng/mL	1.1-4.4 ng/mL
Thyroid-stimulating hormone	1.38 mIU/L	0.350-5.500 mIU/mL
Free thyroxine	1.0 ng/dL	0.8-1.8 ng/dL