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Glucose in Whole Blood by Enzymatic Method

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of glucose (sugar) in your blood, which helps monitor blood sugar levels.

Quick summary

["A blood glucose test helps check if your body is processing sugar properly, often used in diabetes management."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
41652-9
Short code
Glucose BldV-mCnc
Synonyms
Glucose BldV-mCnc
Category
glucose
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Ref low
70
Ref high
100
Critical range
50 N/A – 400 N/A
Fasting
true
Population
adult
Sex
all
Age range
18–65 years
CPT
82947
SNOMED
260395008
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Doctors may order this test to diagnose or monitor conditions like diabetes, hypoglycemia, or to assess how your body responds to medications or treatments. It can also be part of routine check-ups or before certain procedures.

What to Expect Before the Test

You may need to fast (not eat or drink) for several hours before the test, depending on your doctor’s instructions. Bring any medications you’re currently taking. Avoid smoking and strenuous activity before the test.

How the Test Is Performed

A healthcare provider will draw blood from a vein in your arm using a small needle. You may feel a brief pinch, but it usually doesn’t cause significant discomfort. The blood sample is then sent to a lab for analysis.

What the Results Mean

Results are typically reported in milligrams per deciliter (mg/dL) or millimoles per liter (mmol/L). While specific ranges vary by lab, high or low results may signal potential health concerns that need further evaluation.

Reference range

Fasting: 70-100 mg/dLN/A

Specimen: whole-blood

Fasting for 8-12 hours required. Water is permitted. Avoid chewing gum and smoking before the test.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Blood Glucose

Frequently asked questions

How often should I get this test?
Your doctor will determine how often you need this test based on your health condition, medications, and overall well-being. For example, people with diabetes may need tests more frequently than others.
What does a 'fasting' blood glucose test mean?
A fasting test means you shouldn’t eat or drink (except water) for a set period before the test, usually 8–12 hours. This helps provide an accurate measure of your blood sugar when your body isn’t processing food.
Can I take my diabetes medication before the test?
Yes, but always follow your doctor’s instructions. Some medications may need to be adjusted or temporarily stopped before the test to avoid affecting results.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy