Bilirubin · high result
What does a high Bilirubin mean?
Short answer
Mildly high bilirubin with otherwise normal liver enzymes is very often Gilbert's syndrome — a harmless inherited variant affecting about 5–10% of people, in which bilirubin rises with fasting, illness or stress. Other causes are red-cell breakdown (hemolysis), liver disease, bile-duct obstruction and some medications. The direct (conjugated) fraction separates liver and bile-duct causes from hemolysis and Gilbert's.
Medically reviewed by Youmna DiStefano, MD · Last reviewed September 2026
When does this result need same-day care?
- Jaundice with abdominal pain, fever, confusion or very dark urine — same-day care
What is the normal range for Bilirubin?
- age 18+: 0.100 – 1.20 mg/dL
Often reflects liver issues, bile-flow obstruction, or accelerated red cell breakdown.
Full reference table, citations and testing options: Bilirubin biomarker page.
What are the common causes of high Bilirubin?
- Gilbert's syndrome (indirect bilirubin mildly high; other liver tests normal)
- Hemolysis — red-cell breakdown
- Liver disease: hepatitis, fatty liver, alcohol, cirrhosis
- Bile-duct obstruction: gallstones, strictures, pancreatic disease
- Medications: some antibiotics, atazanavir, rifampin
- Fasting, dehydration, strenuous exercise (Gilbert's exaggerates these)
What symptoms go with high Bilirubin?
- Often none
- Yellowing of the eyes or skin, dark urine, pale stools, itching when higher
What do clinicians usually check next?
- Direct and indirect bilirubin fractions
- ALT, AST, alkaline phosphatase, GGT
- CBC, reticulocyte count, LDH and haptoglobin if hemolysis is suspected
- Ultrasound if direct bilirubin or alkaline phosphatase is raised
Follow-up tests available at TestWell: CBC with Differential ($21.99), CBC (Complete Blood Count) ($21.99), ALT (Alanine Aminotransferase) ($18.99), GGT (Gamma-Glutamyl Transferase) ($19.99), LDH (Lactate Dehydrogenase) ($19.99), Haptoglobin ($101.99).
How do you recheck Bilirubin?
Prices are cash-pay; every order adds one $6 lab processing fee. Physician authorization is included; no insurance or referral needed.
| Test or panel | Type | Price | Fasting | Results |
|---|---|---|---|---|
| General Wellness Panel | Panel · 4 tests | $89.99 | Yes | 1–3 business days |
| Kidney Health Panel | Panel · 4 tests | $64.99 | Yes | 2–4 business days |
| Gut Health Panel | Panel · 5 tests | $129.99 | No | 3–7 business days |
| Comprehensive Metabolic Panel | Test · 14 biomarkers | $22.99 | Yes | 1–3 business days |
Common questions
What is Gilbert's syndrome?
A common, harmless genetic variant that slows bilirubin processing. Bilirubin runs mildly high — more so when fasting or ill — with all other liver tests normal. No treatment is needed.
Sources
Educational content, not a diagnosis. Lab results are one input; a clinician interprets them with your history and exam.