--- title: Glucose Test type: biomarker url: "https://www.test-well.com/biomarkers/glucose" also_known_as: - glucose - blood glucose - fasting glucose - fasting blood glucose category: Metabolic Health units: - mg/dL order_price_usd: 20.99 order_item: Basic Metabolic Panel order_url: "https://www.test-well.com/tests/basic-metabolic-panel" reviewed_at: 2026-09-05 --- # Glucose > Glucose is measured with a standard blood draw after an 8–12 hour fast. A typical reference range is 70.0 – 99.0 mg/dL. At TestWell it's $20.99 all-in as Basic Metabolic Panel, results in 1–3 business days, drawn at Quest or Labcorp. An out-of-range result is a prompt to look closer, not a diagnosis. Also known as: glucose, blood glucose, fasting glucose, fasting blood glucose. ## Key facts | Fact | Value | | --- | --- | | Units | mg/dL | | Sample | Blood draw | | Fasting | 8–12 hours | | Results | 1–3 business days | | Price | $20.99 | | Labs | Quest or Labcorp · BioReference in NY/NJ | ## What does Glucose measure? Your blood sugar level. Fasting glucose is one of the primary screens for diabetes. ## What is the normal range for Glucose? | Population | Reference range | | --- | --- | | age 18+, fasting | 70.0 – 99.0 mg/dL | Reference intervals differ slightly between labs; the range printed on your report is the one to interpret against. Ranges are usually set so 95% of healthy people fall inside them. ## What does a high Glucose mean? Fasting values above 100 mg/dL can indicate prediabetes; above 125 mg/dL on two separate tests suggests diabetes. ## What does a low Glucose mean? Can reflect prolonged fasting, certain medications (especially diabetes drugs), or hormonal conditions. ## How often should you retest? The ADA suggests re-screening at least every 3 years when fasting glucose is normal, and at least once a year with prediabetes (100–125 mg/dL). A single fasting result at or above 126 mg/dL is confirmed with a repeat test — or an A1c — before it counts as diabetes. ## How do you get tested for Glucose? | Order | Type | Price | Includes | | --- | --- | --- | --- | | [Basic Metabolic Panel](https://www.test-well.com/tests/basic-metabolic-panel) | Single test | $20.99 | This marker | ## Quest vs Labcorp vs BioReference | Lab | Available | Price | Notes | | --- | --- | --- | --- | | Quest Diagnostics | Yes | $20.99 | Choose Quest at checkout; walk-in patient service centers in every state TestWell serves outside NY and NJ. | | Labcorp | Yes | $21.99 | Choose Labcorp at checkout; walk-in patient service centers in every state TestWell serves outside NY and NJ. | | BioReference (NY & NJ) | Yes | $22.99 | New York and New Jersey orders route here automatically — state rules keep Quest and Labcorp from accepting self-ordered draws. | - [What a high Glucose means (causes, symptoms, next steps)](https://www.test-well.com/biomarkers/glucose/high) - [What a low Glucose means (causes, symptoms, next steps)](https://www.test-well.com/biomarkers/glucose/low) ## Common questions about Glucose ### Do I need a doctor's order to test my glucose? No. TestWell's licensed physician network reviews and approves your order — usually within minutes. You can place an order online without an in-person visit or a referral from your own doctor. ### How long does it take to get Glucose results? Most Glucose results are available in 1–3 business days after your specimen arrives at the lab. You'll get an email the moment your results are ready, with everything viewable in your TestWell portal. ### How much does a Glucose test cost? Our Basic Metabolic Panel starts at $20.99. That's the all-in price — no copays, no insurance hoops, no surprise bills. HSA and FSA cards are accepted. ### Do I need to fast before my Glucose test? Yes — for the most accurate result, fast for 8–12 hours before your blood draw. Water is fine; coffee, food, and supplements are not. Your prep instructions will be included with your order. ### Which lab will process my Glucose test? Your test will be processed by Quest Diagnostics, Labcorp, or BioReference depending on which is closest to you and which lab carries the test. All three are CLIA-certified and trusted by hospitals nationwide. You'll choose your lab during checkout from 4,000+ locations. ## Sources - [American Diabetes Association](https://diabetes.org/about-diabetes/diagnosis) - [American Diabetes Association — Standards of Care in Diabetes 2024, §2 Diagnosis and Classification](https://doi.org/10.2337/dc24-S002) ## Related biomarkers - [Creatinine](https://www.test-well.com/biomarkers/creatinine) - [eGFR](https://www.test-well.com/biomarkers/egfr) - [BUN](https://www.test-well.com/biomarkers/bun) - [ALT](https://www.test-well.com/biomarkers/alt) - [AST](https://www.test-well.com/biomarkers/ast) - [Alkaline Phosphatase](https://www.test-well.com/biomarkers/alkaline-phosphatase) - [Reference range lookup tool](https://www.test-well.com/tools/reference-range-lookup) - [Lab unit converter](https://www.test-well.com/tools/lab-unit-converter) - [All biomarkers](https://www.test-well.com/biomarkers) --- Medically reviewed by Youmna DiStefano, MD (Medical Reviewer, TestWell); last reviewed 2026-09-05. Review policy: https://www.test-well.com/reviewers/youmna-distefano-md Canonical page: https://www.test-well.com/biomarkers/glucose Machine-readable catalog: https://www.test-well.com/api/catalog.json · MCP server: https://www.test-well.com/mcp · Overview for agents: https://www.test-well.com/llms.txt Prices are cash-pay, in USD, and include physician authorization; every order adds one flat $6 lab processing fee. Educational content is not a diagnosis — discuss results with a clinician.