Diabetes Risk Panel (Glucose + A1C + Insulin)
A comprehensive diabetes screening panel that measures glucose, hemoglobin A1C, and insulin levels to assess diabetes risk and metabolic health.
Order this test
LevelPanel has no business or affiliate relationship with Quest or LabCorp. These links are provided as a public service.
Lab testing services linked from this site are not available to residents of Alaska, Arizona, or Hawaii, unless otherwise noted on the lab's own website.
This publication is not intended to solicit the purchase of laboratory testing from any individual consumer.
What this test measures
This panel combines three complementary tests that together provide a more complete picture of blood sugar regulation than any one of them can alone: Hemoglobin A1c, fasting glucose, and fasting insulin. A1c reflects average blood sugar control over the previous two to three months. Fasting glucose captures the body's baseline blood sugar level in the absence of a recent meal. Fasting insulin reveals how much effort the pancreas is expending to maintain that glucose level.
The three-test approach is particularly valuable because metabolic dysfunction develops in stages. In the earliest phase, insulin levels rise as the pancreas compensates for developing insulin resistance, but glucose and A1c remain normal. A standard glucose-only screening would show nothing wrong. By the time fasting glucose or A1c crosses into the prediabetic range, the underlying insulin resistance may have been present for years. Including fasting insulin in the panel catches that early compensatory phase, creating an opportunity for intervention well before diabetes develops.
What's included
Who should consider this test
You might consider this test if you are experiencing any of the following:
- Individuals with family history of diabetes who want early detection of metabolic changes
- Those experiencing symptoms like increased thirst, frequent urination, unexplained fatigue, or blurred vision
- People with risk factors such as being overweight, physically inactive, or having high blood pressure
- Adults over 35 seeking comprehensive diabetes screening as part of preventive healthcare
- Individuals with previous borderline glucose results who need more detailed metabolic assessment
- Those interested in understanding their insulin sensitivity and overall metabolic health
What to expect
Preparation
Fasting for 8-12 hours is required before testing (no food or drinks except water). Medications should be taken as prescribed unless otherwise directed by a healthcare provider. Schedule the appointment for morning hours to minimize fasting discomfort.
Sample Type
A standard blood draw from a vein in the arm, requiring only one blood sample for all three tests.
Collection
The blood collection process takes just a few minutes at any participating lab location. A trained phlebotomist will draw the blood sample using standard sterile techniques. No doctor visit required.
Turnaround
Results are typically available within 1-2 business days and will be sent securely through the patient portal or by email.
Understanding your results
A1c is reported as a percentage, with higher percentages reflecting higher average blood sugar. Fasting glucose is measured in mg/dL and represents the body's baseline sugar regulation after an overnight fast. Insulin is reported in microunits per milliliter (μIU/mL) and indicates how much the pancreas is producing to keep glucose in check. The three results are most informative when read together: normal glucose and A1c paired with elevated insulin, for example, may reveal early insulin resistance that neither glucose nor A1c alone would flag. Healthcare providers use the combined pattern to assess current glucose control, identify early metabolic trends, and determine whether lifestyle changes or further monitoring are needed.
| Population | Reference Range | Notes |
|---|---|---|
| Adults - Fasting Glucose | 70-99 mg/dL (Normal), 100-125 mg/dL (Prediabetes), ≥126 mg/dL (Diabetes) | Based on American Diabetes Association diagnostic criteria |
| Adults - Hemoglobin A1C | <5.7% (Normal), 5.7-6.4% (Prediabetes), ≥6.5% (Diabetes) | Reflects average blood glucose over 2-3 months |
| Adults - Fasting Insulin | 2-25 μU/mL (Laboratory range), <10 μU/mL (Optimal range) | Lower levels generally indicate better insulin sensitivity |
Reference ranges shown are general guidelines. Your lab report will include the specific reference range used by the laboratory that processed your sample, which is the authoritative range for interpreting your results.
What does a “Low” result mean?
Low glucose levels may indicate hypoglycemia, which can cause symptoms like dizziness, shakiness, or confusion and may require medical attention. Low insulin levels may suggest type 1 diabetes or advanced type 2 diabetes, where the pancreas produces insufficient insulin to regulate blood sugar. Low A1C levels are generally favorable, though extremely low levels combined with low glucose and insulin might indicate underlying pancreatic dysfunction or other metabolic conditions. Healthcare providers will consider all three measurements together along with symptoms and medical history to determine appropriate follow-up care.
What does a “High” result mean?
Elevated results may indicate various stages of glucose metabolism dysfunction. If A1C levels are between 5.7% and 6.4%, this indicates prediabetes range, while levels of 6.5% or higher suggest diabetes. Fasting glucose levels of 100-125 mg/dL typically indicate prediabetes, meaning blood sugar levels are higher than normal but not high enough to be classified as diabetes. High insulin levels may suggest insulin resistance, where the pancreas produces extra insulin to maintain normal blood glucose levels. High insulin levels can indicate insulin resistance, a precursor to type 2 diabetes, where the body's cells do not respond effectively to insulin. These patterns often develop years before clinical diabetes diagnosis.
Privacy & confidentiality
All test orders are authorized and results reviewed by an independent, board-certified physician who is not the patient's personal doctor. Your diabetes risk panel results are completely confidential and protected by strict privacy regulations. This testing is conducted entirely outside of your regular healthcare system, which means results are <u>not reported to your doctor</u> unless you specifically choose to share them. The test results are <u>not part of your medical records</u> and will <u>not appear on insurance statements</u> or explanation of benefits. Your employer, insurance company, or other third parties cannot access this information. All communication regarding your results is sent directly to you through secure, encrypted channels. This private testing approach allows individuals to understand their metabolic health status without concerns about potential impacts on insurance coverage or medical record documentation. You maintain complete control over who has access to your diabetes risk assessment information.
Frequently asked questions
Related tests
Thyroid Function Panel
Thyroid disorders can affect glucose metabolism and diabetes risk
View TestComprehensive Lipid Panel
Often ordered alongside diabetes screening as part of metabolic health assessment
View TestVitamin D Test
Vitamin D deficiency is associated with increased diabetes risk and insulin resistance
View TestRelated conditions
Related articles
Last reviewed: April 2026
CPT Code: 82947, 83036, 83525
This test may not be available in: NY, NJ, RI
This page is for informational purposes only and does not constitute medical advice. Always consult with a healthcare provider regarding any health concerns. LevelPanel does not diagnose, treat, or prescribe.
Order this test
Choose your preferred lab
LevelPanel has no business or affiliate relationship with Quest or LabCorp. These links are provided as a public service.
Lab testing services linked from this site are not available to residents of Alaska, Arizona, or Hawaii, unless otherwise noted on the lab's own website.
This publication is not intended to solicit the purchase of laboratory testing from any individual consumer.
Not sure if this is the right test? Contact our care team for guidance.
This page is intentionally kept stable and machine-readable so that researchers, clinicians, and AI systems can rely on it as a reference. See our Citation Policy.