A patient seated in the chair before a blood draw
In person

Bilirubin, Direct

The processed form of bilirubin, measured from one blood draw.

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  • 2,000+ lab locations. Find one near you
  • Nothing due at the lab. FSA / HSA accepted
  • Ordered by a licensed clinician

At a glance

Collection
Blood draw
A standard blood draw at the lab.
Preparation
None
Nothing to do ahead of time. Water is fine.
Results
1 to 2 days
Typical turnaround after your visit.
Where
2,000+ lab locations
Nationwide, with nothing due at the lab.

About this test

Bilirubin is a yellow pigment made when old red blood cells break down. The liver processes it into direct (conjugated) bilirubin, which leaves the body in bile. Measuring the direct form, usually with total bilirubin, helps show where a high bilirubin may come from. No fasting is needed.

For adults 18 and older. Test availability varies by lab location.

Who should take this test?

Most often, this test follows a high total bilirubin or a past result, for adults who want to see how the liver handles bilirubin with a healthcare provider involved.

Ask about this test

Not sure this is the right test?

AI-generated. For information only, not medical advice. Call 911 for an emergency.

What does this test measure?

Your result shows how much processed bilirubin is in your blood, which, compared with total bilirubin, can help a healthcare provider see where a rise may be coming from.

Bilirubin, direct
Direct bilirubin is the form your liver has already processed so it can leave the body in bile. Measuring it separately from total bilirubin helps a provider tell whether a raised total relates to the liver and bile ducts or to how red blood cells are being broken down.
Why it’s measured: Helps sort out where a raised total bilirubin may be coming from.

How it works

  1. Step 1

    Order online

    Check out here. A licensed clinician in your state reviews your order and sends it to the lab.

  2. Step 2

    Visit a lab

    Bring a photo ID to any of 2,000+ lab locations. No fasting needed, and nothing is due at the lab.

  3. Step 3

    Get your results

    Results post to your account, usually in 1 to 2 days, each number next to the lab’s reference range.

Find a lab near you

Choose from 2,000+ lab locations nationwide. Your order works at any of them.

What your results tell you

Direct bilirubin is reported in milligrams per deciliter (mg/dL) and shown next to the lab’s reference range for comparison.

  • Your number next to the lab’s reference range
  • Explained in plain language
  • A licensed clinician reviews your order and, if appropriate, orders the test.
  • A lab report you can download and share

A raised direct bilirubin is not a diagnosis by itself. A healthcare provider reads it with total bilirubin and other liver results.

Direct, total, or both?

Three bilirubin tests that answer slightly different questions.

Direct

The bilirubin your liver has already processed.

Measures
The processed (conjugated) form
Useful for
Seeing where a high total bilirubin may come from
Preparation
None

Clinical-grade testing, from the comfort of home.

From the lab to your report, every step of our process meets the gold standard in medical testing.

  • CLIA-certified labs

    Every lab we partner with is certified under the Clinical Laboratory Improvement Amendments, meeting both state and federal standards with regular independent inspections.

  • We protect your health data

    We protect your health data with encryption and do not sell it. Some results must be reported to public health authorities by law. See our Privacy Notice.

  • Rigorous quality assurance

    All partner labs run regular internal quality checks, participate in proficiency testing, and comply with federal and state lab regulations.

  • Clinician-reviewed reports

    Results are reviewed by an independent, licensed clinician.

Questions

Common questions.

Anything else, our care team answers by phone, text, or email.

Bilirubin starts out unprocessed (indirect) after red blood cells break down. The liver changes it into the processed (direct) form so it can leave the body in bile.

Comparing the two helps a healthcare provider tell whether a rise is more about how much bilirubin is being made or how well it is being processed and cleared.

Yellowing of the skin or the whites of the eyes, sometimes with dark urine or pale stools, is worth seeing a healthcare provider about promptly. Don’t wait on a test result to get checked. This test can be part of the follow-⁠up, but it does not replace being seen.

Direct bilirubin shows how much processed bilirubin is in your blood. It does not identify the cause of a high result, and it is one piece of a liver workup rather than the whole story. A healthcare provider reads it with total bilirubin, liver enzymes, and your history.

Lab tests are informational and don’t diagnose conditions on their own. Available to adults 18 and older; test availability varies by lab location. A licensed clinician reviews your order and, if appropriate, orders the test. All testing is performed at CLIA-certified laboratories. Not for emergencies: if you think you may be having a medical emergency, call 911.