Glucose Phenotype Exclusion Criterion Screening (Serum/Plasma)
This test helps identify if your blood glucose levels may be affected by certain genetic factors that could influence how your body processes glucose, sometimes seen in conditions like hereditary fructose intolerance or other rare metabolic disorders.
["Checks for genetic factors that might affect blood sugar handling."]
Key facts at a glance
- LOINC
- 66179-3
- Short code
- Exclusion criteria glucose PhenX
- Synonyms
- Exclusion criteria glucose PhenX
- 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
- Method
- phenx
- 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 Might Be Ordered
Your healthcare provider may recommend this test if you have symptoms like fatigue, nausea, vomiting, or abdominal pain after eating certain foods (e.g., fruits with fructose), or if you have a family history of rare metabolic disorders. It’s also sometimes used during genetic testing for unexplained blood sugar issues.
What to Expect Before the Test
No special preparation is needed. You’ll provide a blood sample, usually drawn from your arm. If you’re taking medications that affect glucose, let your provider know before the test.
What the Test Measures
This test screens for specific genetic variations that could alter how your body breaks down glucose or other sugars. It’s not a routine blood sugar test but helps rule out rare genetic causes of unusual glucose responses.
Common Reasons for Abnormal Results
If your results suggest a genetic factor affecting glucose metabolism, your provider may recommend further testing or dietary adjustments. Mild variations may not require immediate action but should be monitored.
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.
Identifying these genetic factors can help prevent complications like severe metabolic crashes or long-term health issues. It’s particularly important for individuals with a family history of metabolic disorders or unexplained symptoms after consuming certain foods.
Short name
Glucose Phenotype Check
Frequently asked questions
Will this test show if I have diabetes?
How soon will I get my results?
Can I eat or drink before this test?
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