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Glucose, Plasma (High-Performance Liquid Chromatography Method)

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

This test measures the amount of glucose (sugar) present in your blood plasma, often checked to monitor blood sugar levels.

Quick summary

["A simple test to track blood sugar health, useful for diabetes management or general metabolic assessment."]

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

Key facts at a glance

LOINC
1537-0
Short code
Glucose 4h p 100 g Glc PO SerPl-mCnc
Synonyms
Glucose 4h p 100 g Glc PO SerPl-mCnc
Category
glucose
Sample
serum
Container
Red-top tube (SST)
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
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

Doctors may order this test to diagnose or monitor conditions like diabetes, hypoglycemia, or to assess how your body processes glucose. It can also help evaluate metabolic disorders or check for signs of stress or illness.

What to Expect Before the Test

You may be asked to fast for a few hours before the test, but this isn’t always required. Bring any medications you’re taking and inform your healthcare provider about recent illnesses or changes in diet.

During the Test Process

A healthcare professional will draw blood from a vein, usually in your arm. The process is quick and typically painless. You may feel a slight pinch or pressure during the draw.

What the Results Mean

Results provide a snapshot of your blood sugar levels at the time of testing. While specific ranges vary by lab, consistently high or low levels may signal underlying health concerns that need further evaluation.

Reference range

Fasting: 70-100 mg/dLN/A

Specimen: serum

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.

Clinical Significance

Short name

Plasma Glucose Level

Frequently asked questions

How often should I get this test?
The frequency depends on your health status. For example, people with diabetes may need regular testing, while others may only need it occasionally or as recommended by their doctor.
Can I eat or drink before this test?
Some tests require fasting, but this test may not. Always follow your healthcare provider’s instructions to ensure accurate results.
What if my results are outside the normal range?
If your results are abnormal, your doctor will discuss them with you. They may recommend further testing, lifestyle changes, or treatment options based on your specific situation.
  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