--- title: Direct Bilirubin Test type: biomarker url: "https://www.test-well.com/biomarkers/direct-bilirubin" also_known_as: - direct bilirubin - conjugated bilirubin - bilirubin, direct category: Metabolic Health units: - mg/dL order_price_usd: 19.99 order_item: Liver Function Panel order_url: "https://www.test-well.com/tests/hepatic-function-panel" reviewed_at: 2026-09-05 --- # Direct Bilirubin > Direct Bilirubin is measured with a standard blood draw; no fasting is needed. A typical reference range is 0.000 – 0.300 mg/dL. At TestWell it's $19.99 all-in as Liver Function 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: direct bilirubin, conjugated bilirubin, bilirubin, direct. ## Key facts | Fact | Value | | --- | --- | | Units | mg/dL | | Sample | Blood draw | | Fasting | Not required | | Results | 1–3 business days | | Price | $19.99 | | Labs | Quest or Labcorp · BioReference in NY/NJ | ## What does Direct Bilirubin measure? The processed (conjugated) form of bilirubin that the liver has prepared for excretion. ## What is the normal range for Direct Bilirubin? | Population | Reference range | | --- | --- | | age 18+ | 0.000 – 0.300 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 Direct Bilirubin mean? Often reflects bile-flow obstruction or liver disease. ## How do you get tested for Direct Bilirubin? | Order | Type | Price | Includes | | --- | --- | --- | --- | | [Liver Function Panel](https://www.test-well.com/tests/hepatic-function-panel) | Single test | $19.99 | This marker | | [Liver Health Panel](https://www.test-well.com/tests/liver-health-panel) | Panel | $59.99 | 4 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 | | [Total Body Panel](https://www.test-well.com/tests/total-body-panel) | Panel | $499.99 | 49 tests | ## Quest vs Labcorp vs BioReference | Lab | Available | Price | Notes | | --- | --- | --- | --- | | Quest Diagnostics | Yes | $19.99 | Choose Quest at checkout; walk-in patient service centers in every state TestWell serves outside NY and NJ. | | Labcorp | Yes | $20.99 | 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 Direct Bilirubin means (causes, symptoms, next steps)](https://www.test-well.com/biomarkers/direct-bilirubin/high) ## Common questions about Direct Bilirubin ### Do I need a doctor's order to test my direct bilirubin? 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 Direct Bilirubin results? Most Direct Bilirubin 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 Direct Bilirubin test cost? Our Liver Function Panel starts at $19.99. 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 Direct Bilirubin test? Fasting is not required for the Direct Bilirubin test. You can have your blood drawn any time of day. ### Which lab will process my Direct Bilirubin 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 - [Mayo Clinic Labs](https://www.mayocliniclabs.com/test-catalog/overview/8364) - [MedlinePlus (NIH) — Bilirubin Blood Test](https://medlineplus.gov/lab-tests/bilirubin-blood-test/) ## Related biomarkers - [Glucose](https://www.test-well.com/biomarkers/glucose) - [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) - [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/direct-bilirubin 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.