--- title: Basophils Test type: biomarker url: "https://www.test-well.com/biomarkers/basophils" also_known_as: - basophils - basophils % - basophil category: Blood Health units: - "%" order_price_usd: 21.99 order_item: CBC with Differential order_url: "https://www.test-well.com/tests/cbc-with-differential" reviewed_at: 2026-09-08 --- # Basophils > Basophils is measured with a standard blood draw; no fasting is needed. A typical reference range is 0.000 – 2.00 %. At TestWell it's $21.99 all-in as CBC with Differential, 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: basophils, basophils %, basophil. ## Key facts | Fact | Value | | --- | --- | | Units | % | | Sample | Blood draw | | Fasting | Not required | | Results | 1–3 business days | | Price | $21.99 | | Labs | Quest or Labcorp · BioReference in NY/NJ | ## What does Basophils measure? The least common white blood cell, involved in allergic and inflammatory responses. ## What is the normal range for Basophils? | Population | Reference range | | --- | --- | | age 18+ | 0.000 – 2.00 % | 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 Basophils mean? Basophils are the rarest white cell, so a high percentage often reflects a small absolute rise of little consequence — allergy, chronic inflammation, hypothyroidism, recovery from infection or spleen removal. A persistently high absolute count (above ~0.2 × 10³/µL), especially with other abnormal counts, is evaluated for myeloproliferative disorders such as chronic myeloid leukemia, where basophilia is a classic feature. ### Common causes of high Basophils 1. Allergic conditions, chronic urticaria 2. Chronic inflammation: inflammatory bowel disease, rheumatoid arthritis 3. Hypothyroidism 4. Recovery from infection, after spleen removal 5. Chronic myeloid leukemia and other myeloproliferative disorders (persistent, with other changes) ### Symptoms that go with high Basophils - Usually none - Itching, hives, flushing with allergic causes ### What clinicians usually check next - Check the absolute count, not just the percentage; repeat in 4–6 weeks - TSH, CRP - Peripheral smear and hematology review if persistent or with high white count, high platelets or splenomegaly Follow-up tests at TestWell: [TSH (Thyroid Stimulating Hormone)](https://www.test-well.com/tests/tsh) ($26.99), [TSH + Free T4](https://www.test-well.com/tests/tsh-with-free-t4) ($27.99), [C-Reactive Protein (CRP)](https://www.test-well.com/tests/crp) ($26.99). **Is 2% basophils high?** It is the top of the reference range and almost always meaningless if the total white count is normal. An absolute count over 0.2 that persists is what gets a second look. ## How do you get tested for Basophils? | Order | Type | Price | Includes | | --- | --- | --- | --- | | [CBC with Differential](https://www.test-well.com/tests/cbc-with-differential) | Single test | $21.99 | This marker | | [General Wellness Panel](https://www.test-well.com/tests/general-wellness-panel) | Panel | $49.99 | 4 tests | | [Baseline Anemia Panel](https://www.test-well.com/tests/anemia-panel) | Panel | $74.99 | 5 tests | | [Fatty Liver Panel](https://www.test-well.com/tests/fatty-liver-panel) | Panel | $92.99 | 6 tests | | [Post-COVID Recovery Panel](https://www.test-well.com/tests/post-covid-panel) | Panel | $99.99 | 7 tests | ## Quest vs Labcorp vs BioReference | Lab | Available | Price | Notes | | --- | --- | --- | --- | | Quest Diagnostics | Yes | $21.99 | 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 | $18.99 | New York and New Jersey orders route here automatically — state rules keep Quest and Labcorp from accepting self-ordered draws. | ## Common questions about Basophils ### Do I need a doctor's order to test my basophils? 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 Basophils results? Most Basophils 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 Basophils test cost? Our CBC with Differential starts at $21.99. 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 Basophils test? Fasting is not required for the Basophils test. You can have your blood drawn any time of day. ### Which lab will process my Basophils 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 - [AACC Lab Tests Online](https://www.testing.com/tests/wbc-differential/) - [MedlinePlus (NIH) — Blood Differential](https://medlineplus.gov/lab-tests/blood-differential/) ## Related biomarkers - [Hemoglobin](https://www.test-well.com/biomarkers/hemoglobin) - [Hematocrit](https://www.test-well.com/biomarkers/hematocrit) - [White Blood Cell Count](https://www.test-well.com/biomarkers/white-blood-cell-count) - [Platelet Count](https://www.test-well.com/biomarkers/platelet-count) - [Red Blood Cell Count](https://www.test-well.com/biomarkers/red-blood-cell-count) - [MCV](https://www.test-well.com/biomarkers/mcv) - [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 2026-09-08. Review policy: https://www.test-well.com/reviewers/youmna-distefano-md Canonical page: https://www.test-well.com/biomarkers/basophils 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.