Feb 8, 2018




Clinical Hub,Tools & Resources,UWHC Lab Test Directory,Chemistry

Glucose, Fasting

Glucose, Fasting (HCFSGLU) Chemistry Lab Test

Name: Glucose, Fasting

Test Name: Glucose, Fasting

Health Link Test Code: HCFSGLU

LIS Test Code: FSGLU

CPT Code(s): 82947

Methodology: Hexokinase

Days Performed: Daily, 24 hours.

In-Lab Turnaround Time: 4 hours.

Stat In-Lab Turnaround Time: 1 hour.

Patient Preparation:

Patient should have nothing to eat or drink (except water) for a minimum of 8 hours before test.

Specimen: Blood

Collection Container: Green cap with yellow ring (PST)

Also Acceptable: Green top, Red cap with yellow ring (SST), Red top

Collection Volume: 1 mL

Pediatric Collection Volume: 0.4 mL

Stability Ambient:

2 days

Stability Refridgerated:

PST: 48 hours

SST: 4 days

Stability Frozen:

1 day

Sample Analyzed: Plasma or serum

Testing Volume: 0.5 mL

Pediatric Testing Volume: 0.2 mL

Specimen Processing:

Centrifuge. If a complete barrier has not formed, transfer cell-free plasma/serum to plastic vial. Refrigerate.

Specimen Transport:

Transport specimen to the laboratory. Transport with coolant pack if coming from clinic location.


 Age  mg/dL
 0 days to 23 hours  40-60
24 hours to 30 days  50-80
31 days to 5 years  60-99
6 years and up  70-99

Interpretation Type: Reference Interval

Critical Calls: yes

Additional Information:

A fasting glucose greater than or equal to 100 mg/dL, but less than 126 mg/dL, indicates an impaired fasting glucose level and a relatively high risk of developing diabetes.