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Glucose, Pre-Meal Blood (Mass Concentration)

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

This test measures the amount of glucose (sugar) in your blood before you eat, helping doctors assess how your body manages blood sugar levels.

Quick summary

["This test helps monitor blood sugar control, especially before meals or during diabetes management."]

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

Key facts at a glance

LOINC
88365-2
Short code
Glucose pre-meal Bld-mCnc
Synonyms
Glucose pre-meal Bld-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?

Your healthcare provider may order this test to check how well your body responds to food, especially if you have diabetes or are at risk for blood sugar issues. It can also help evaluate how medications or treatments affect your blood sugar levels.

What to Expect Before the Test

You’ll typically fast for 8 to 12 hours before this test. Bring any medications you’re currently taking to your appointment. Blood is drawn from a vein, usually in your arm, and it takes a few minutes.

What Happens During the Test?

A healthcare professional will clean the area where the blood will be taken, insert a small needle, and collect a sample. You may feel a slight pinch, but the process is quick. The blood is then sent to a lab for analysis.

What Are the Results Used For?

Results help determine if your blood sugar is within a healthy range before meals. They can guide treatment plans, such as adjusting insulin doses or lifestyle changes, to prevent high or low blood sugar.

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

Pre-Meal Blood Glucose

Frequently asked questions

How long does it take to get my results back?
Results are usually available within 24 to 48 hours, depending on your lab. Your healthcare provider will contact you with the findings once they’re ready.
Can I eat or drink anything before the test?
No, you must fast (not eat or drink anything except water) for 8 to 12 hours before the test. Avoid caffeine or sugary drinks as well.
What if I have diabetes and take insulin?
If you’re taking insulin or other diabetes medications, ask your provider about adjusting your dose before fasting for this test. Always follow their specific instructions.
  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