Skip to content

Serum or plasma concentration of **glucose** (measured via enzymatic method)

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

This test measures the amount of glucose (sugar) in your blood, typically drawn from a vein or collected in a tube.

Quick summary

["Glucose levels help monitor blood sugar, important for diabetes management and overall health."]

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

Key facts at a glance

LOINC
100397-9
Short code
Goat Meat IgG Qn
Synonyms
Goat Meat IgG Qn
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
82784
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your healthcare provider may order this test to check for conditions like diabetes, high or low blood sugar, or to monitor treatment effectiveness. It can also be used during pregnancy, before surgeries, or if you have symptoms like excessive thirst, frequent urination, or unexplained weight changes.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast (not eat or drink) for 8–12 hours before the test if it’s part of a fasting blood sugar check. If you’re pregnant or have certain conditions, your provider will give specific instructions.

What Happens During the Test

A healthcare professional will insert a small needle into a vein (often in your arm) to draw blood. You may feel a slight pinch, but it’s over quickly. The blood is then sent to a lab for analysis.

What the Results Mean

Results are typically reported as a numerical value (e.g., mg/dL) but aren’t always interpreted alone. Your provider will compare them to your clinical picture and other tests to diagnose or guide treatment. Normal values can vary by lab and individual health.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

How often should I get this test?
Frequency depends on your health status. People without diabetes may get this test occasionally (e.g., during routine checkups), while those with diabetes often test monthly or more often as needed. Your provider will set a schedule based on your needs.
What if my results are out of range?
If your results are high or low, your provider will review them with you and may recommend lifestyle changes (like diet or exercise), medications, or further testing. They’ll tailor advice to your specific situation.
Can I eat or drink before this test?
For fasting tests, avoid food and liquids (except water) for 8–12 hours before drawing blood. If it’s a non-fasting test, follow your provider’s instructions—some may allow small sips of water or clear liquids. Always confirm with them before the appointment.
  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