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Glucose (Plasma) Measured During Meals via Mass Concentration

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

This test measures your blood sugar levels while you eat, helping doctors assess how your body responds to food.

Quick summary

["Understanding how your body processes glucose during meals can help manage diabetes or other blood sugar conditions."]

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

Key facts at a glance

LOINC
16915-1
Short code
Glucose p meal SerPl-mCnc
Synonyms
Glucose p meal 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

Your doctor may order this test if you have diabetes, prediabetes, or if you’re being evaluated for conditions like insulin resistance or metabolic syndrome. It helps track how well your body regulates blood sugar after eating.

How the Test Works

A blood sample is taken from a vein (usually in your arm) while you’re eating a standard meal. The test measures the concentration of glucose in your plasma at specific intervals to observe how your body responds.

What to Expect Before the Test

No special preparation is needed, but you may be asked to follow a specific diet or timing for meals the day of the test. Bring any medications you’re taking with you.

What the Results Mean

Results help determine if your body is absorbing glucose properly or if insulin levels are adequate. Abnormal results may indicate issues like delayed digestion, insulin resistance, or other metabolic disorders.

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.

◆Associated findings1

Short name

Meal-Specific Plasma Glucose

Frequently asked questions

Why do I need this test if I already have diabetes?
Even with diabetes, this test can help assess how well your current treatment (medications, insulin, diet) is working during meals. It may also identify if you’re experiencing delayed glucose spikes or poor meal absorption.
How long will I need to wait for my results?
Results are typically available within a few days to a week, depending on your lab’s processing time. Your doctor will contact you once they’re ready for review.
Can I eat or drink anything before the test?
Yes, you can eat a standard meal as scheduled, but avoid sugary drinks or snacks unless instructed otherwise. Follow any specific dietary guidelines your doctor provides.
  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