. The cmp includes 14 components, and the bmp typically has eight. The larger, more powerful chambers in the lower portion of your heart produce bnp. How Do I Schedule Appointments for Quest Diagnostic Lab Orders? HealthTap Help Center from healthtaphelp.zendesk.com You can also contact the billing customer service or the customer service department at the laboratory that services your area. With certain blood tests, you may be instructed to fast for up to eight hours before your appointment. Fasting blood glucose measures the amount of glucose in your blood to test for diabetes or prediabetes.