CA 19-9 · high result
What does a high CA 19-9 mean?
Short answer
CA 19-9 is the marker used to follow pancreatic and biliary cancers during treatment. It rises with any bile-duct obstruction — gallstones, cholangitis, pancreatitis — and with cirrhosis, cystic fibrosis and some lung and thyroid conditions, so a high value without imaging findings is not diagnostic. About one in ten people cannot make CA 19-9 at all (Lewis-antigen negative), so a normal value does not exclude cancer either.
Medically reviewed by Youmna DiStefano, MD · Last reviewed September 2026
When does this result need same-day care?
- Jaundice, severe abdominal pain or fever with a high CA 19-9 — same-day care
What is the normal range for CA 19-9?
- age 18+: 0.000 – 37.0 U/mL
Full reference table, citations and testing options: CA 19-9 biomarker page.
What are the common causes of high CA 19-9?
- Bile-duct obstruction: gallstones, strictures, cholangitis
- Acute or chronic pancreatitis, cirrhosis
- Pancreatic, biliary, gastric and colorectal cancers
- Cystic fibrosis, interstitial lung disease, hypothyroidism
What symptoms go with high CA 19-9?
- None from the marker itself
- Jaundice, upper abdominal or back pain, weight loss, new-onset diabetes — the pancreatic symptoms to take seriously
What do clinicians usually check next?
- Liver panel and bilirubin; abdominal imaging (ultrasound, then CT/MRI as indicated)
- Repeat after any obstruction resolves
- GI or oncology review when very high or with imaging findings
How do you recheck CA 19-9?
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 |
|---|---|---|---|---|
| Men's Cancer Screening Panel | Panel · 12 tests | $299.99 | Yes | 3–5 business days |
| Women's Cancer Screening Panel | Panel · 12 tests | $299.99 | Yes | 3–5 business days |
| CA 19-9 (Pancreatic Cancer Marker) | Test | $28.99 | No | 2–5 business days |
Common questions
Should I get CA 19-9 to screen for pancreatic cancer?
Guidelines advise against it — false positives from benign biliary disease are common and early cancers are often missed. High-risk families are followed with imaging programs instead.
Educational content, not a diagnosis. Lab results are one input; a clinician interprets them with your history and exam.