Biomarker Lens

Common biomarkers

  • Hemoglobin
  • Glucose
  • ALT
  • Apolipoprotein B
  • C-Reactive Protein, Cardiac
  • Ferritin
  • Alb/Creat Ratio, Urine
  • Alkaline Phosphatase
  • FSH
  • T4,Free(Direct)

Biomarkers · Chemical

Bilirubin Direct

A bilirubin blood test measures the levels of bilirubin in your blood. Bilirubin is a yellowish substance made during your body's normal process of breaking down old red blood cells.

Bilirubin Blood Test, MedlinePlus, National Library of Medicine

Also listed as
direct bilirubin, Bilirubin, Direct, conjugated bilirubin, dbil
Primary unit
mg/dL
LOINC codes
1968-7
Tests that measure Bilirubin Direct
Quest Diagnostics 8, Labcorp 5

Tests

Check the catalog code, specimen, method and preparation for every test that measures Bilirubin Direct. Select up to five tests to compare them side by side.

Quest Diagnostics 8 tests

Single-analyte tests

  • Bilirubin, Direct 285

    Serum · Fasting not stated · Turnaround Set up: Mon-Sat; Report available: 3 days

    Method and collection
    Method
    Spectrophotometry (SP)
    Collection
    Protect from light by wrapping a spun SST in foil or transferring serum/plasma to an amber transport vial. Avoid hemolysis.
    Reference notes
    ≤0.2 mg/dL
    Quest Diagnostics catalog page

  • Bilirubin, Direct , Neonatal 34162

    Serum · Fasting not stated · Turnaround Set up: Sun-Fri (Night shift); Report available: 3 days

    Method and collection
    Method
    Spectrophotometry (SP)
    Collection
    Patients should be less than 60 days of age. Draw 2 amber Microtainer® Serum separator tubes (SST) or wrap 2 spun Microtainer® serum separator tubes (SST) in foil. Avoid hemolysis.
    Reference notes
    ≤0.3 mg/dL
    Quest Diagnostics catalog page

Panels that include this biomarker

  • Hepatic Function Panel without Total Protein 34391

    7 analytes · Serum · Fasting not stated

    Method and collection
    Method
    See individual tests
    Quest Diagnostics catalog page

  • Hepatic Function Panel 10256

    10 analytes · Serum · Fasting not stated · Turnaround Set up: Mon-Sat; Report available: 3 days

    Method and collection
    Method
    See individual tests
    Collection
    Administration of STRENSIQ may interfere in certain assays and may falsely elevate values. For patients receiving STRENSIQ, consideration should be given to using alternate methods.
    Reference notes
    See Laboratory Report
    Quest Diagnostics catalog page

  • Hepatic Function Panel, Plasma 90842

    10 analytes · Plasma · Fasting not stated

    Method and collection
    Method
    See individual tests
    Collection
    Separate plasma from cells promptly Note: For serum Hepatic Function Panel, please see test code 10256
    Reference notes
    See Laboratory Report
    Quest Diagnostics catalog page

  • Hepatic Function Panel with FIB-4 Index with Reflex to ELF Score 12735

    12 analytes · Serum · Fasting not stated

    Method and collection
    Method
    Electronic Cell Sizing/Counting/Cytometry/Microscopy • Spectrophotometry (SP)
    Reference notes
    See Laboratory Report
    Quest Diagnostics catalog page

  • Liver Fibrosis, Hepatic Function Panel with Fibrosis-4 (FIB-4) Index 30710

    12 analytes · Serum · Fasting not stated

    Method and collection
    Method
    Spectrophotometry (SP) • Electronic Sizing and Counting/Cytometry/Microscopy
    Collection
    Note: If drawn with lead testing, EDTA (tan-top) is required
    Reference notes
    See Laboratory Report
    Quest Diagnostics catalog page

Labcorp 5 tests

Single-analyte tests

  • Bilirubin, Direct 001222

    Serum · Fasting not stated · Turnaround Within 1 day

    Method and collection
    Method
    Colorimetric
    Collection
    Separate serum or plasma from cells within 45 minutes of collection.
    Reference notes
    See table. Age Range (mg/dL) 0 to 31 d 0.00−0.60 Children 1 month and older and adults 0.00−0.40
    Labcorp catalog page

Panels that include this biomarker

  • Bilirubin Fraction, Neonatal 205500

    3 analytes · Serum · Fasting not stated · Turnaround Within 1 day

    Method and collection
    Method
    Kinetic
    Collection
    If a red-top tube or plasma is used, transfer separated serum or plasma to a plastic transport tube. Protect from light.
    Labcorp catalog page

  • Bilirubin, Total and Direct 001214

    3 analytes · Serum · Fasting not stated · Turnaround Within 1 day

    Method and collection
    Method
    Colorimetric
    Collection
    Separate serum or plasma from cells within 45 minutes of collection.
    Labcorp catalog page

  • Hepatic Function Panel (7) 322755

    7 analytes · Serum · Fasting not stated · Turnaround Within 1 day

    Method and collection
    Method
    See individual tests.
    Collection
    Separate serum or plasma from cells within 45 minutes of collection.
    Labcorp catalog page

  • Liver Fibrosis Risk Profile With Hepatic Function Panel, Complete Blood Count (CBC) With Differential, FIB-4, and APRI 402145

    27 analytes · Serum · Fasting not stated · Turnaround Within 1 day

    Method and collection
    Method
    See individual test components.
    Collection
    Separate serum from cells within 45 minutes of collection; invert EDTA tube immediately 8 to 10 times once tube is filled at the time of collection.
    Labcorp catalog page

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Sources

Verify these ranges and sources

We compile this page from named laboratory catalogs, guidelines and studies. Labs calculate reference intervals from the people they test, for one assay method and one population group, so an interval describes that population rather than an optimal target.

Interpret your own results with a licensed clinician, or track your lab history and health goals in Aumnivida.

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