Glucose, Plasma (High-Performance Liquid Chromatography)
This test measures the amount of glucose (sugar) in your blood plasma, typically done to assess blood sugar levels.
["A key check for blood sugar health, often used in diabetes management or metabolic evaluations."]
Key facts at a glance
- LOINC
- 1514-9
- Short code
- Glucose 2h p 100 g Glc PO SerPl-mCnc
- Synonyms
- Glucose 2h 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 (low blood sugar), or to check for metabolic disorders. It can also be part of routine health screenings or before certain treatments.
What to Expect Before the Test
You’ll likely have a small needle inserted into your arm or hand to draw blood. Fast your stomach for 8–12 hours before testing unless instructed otherwise. Wear loose clothing for easy access.
What the Results Mean
Results help determine if your blood sugar is too high, too low, or within a healthy range. Abnormal levels may signal diabetes, prediabetes, or other health issues requiring further evaluation.
Common Conditions Linked to This Test
High glucose levels may indicate diabetes or insulin resistance, while low levels could signal hypoglycemia, adrenal disorders, or liver/kidney problems. Regular monitoring helps prevent long-term complications.
Reference range
Fasting: 70-100 mg/dLN/A
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: Elevated or consistently high glucose levels often prompt further testing for diabetes or prediabetes, while persistently low levels may require medical evaluation for underlying causes like endocrine disorders or medication side effects.
Short name
Plasma Glucose
Frequently asked questions
What causes blood sugar levels to fluctuate normally?
How often should I get this test?
Can diet or exercise affect this test result?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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