Can this result diagnose a condition on its own?

No. Laboratory results are interpreted with symptoms, medical history, specimen conditions and related tests.

Which reference range should I use?

Start with the performing laboratory's own reference interval; clinical cutoffs, when relevant, are separate sourced thresholds used for a specific purpose.

When should I discuss the result with a healthcare professional?

Results that are clearly outside range, persistent, symptomatic or unexpected should be reviewed by a healthcare professional.

Information about a laboratory test

High Ceruloplasmin: What Does It Mean?

High ceruloplasmin can occur with inflammation, pregnancy/estrogen effects and other contexts; copper results provide additional information.

Test summary

Test name: Ceruloplasmin
Abbreviations: CP, Ceruloplasmin
Category: Copper Metabolism / Proteins
Panel: Copper Metabolism Evaluation
Specimen: Serum / plasma
Common units: mg/dL, g/L

What does the test measure?

The Ceruloplasmin test measures the blood protein ceruloplasmin that carries most circulating copper.

Why is the test ordered?

Ordered when trace-mineral deficiency or excess is suspected, with malabsorption or in selected clinical contexts; timing and inflammation can affect some measurements.

Information about a low result

Low ceruloplasmin can occur with disorders of copper handling, malnutrition/malabsorption or some liver/kidney conditions; it does not diagnose Wilson disease by itself.

Information about a high result

High ceruloplasmin can occur with inflammation, pregnancy/estrogen effects and other contexts; copper results provide additional information.

Reference and clinical context

Start with the performing laboratory's reference interval, unit, specimen type and method. Numeric information on this page is stored as sourced example intervals or clinical thresholds.

Reference range 1

>= 20 – <= 40 mg/dL

Population: Adults
Age range: 18
Specimen: Serum

Sourced example reference interval for Ceruloplasmin

This is a sourced example reference interval; laboratory, method, age and clinical context can change the range. The user's own report takes priority.

Reference ranges may vary by laboratory, method used, age, sex, pregnancy status, and clinical context. The reference range on your own laboratory report takes precedence.

Interpretation notes

Ceruloplasmin carries most circulating copper. Diagnostic interpretation may require serum/urine copper, symptoms and family history.

Related specialties

Internal Medicine
Family Medicine
Endocrinology

Frequently asked questions

Sources

Copper – Health Professional Fact Sheet — NIH Office of Dietary Supplements
U.S. government nutrition reference · 2022 · Copper biology, deficiency and zinc-copper interaction · Verified: Aug 12, 2026
Ceruloplasmin Test — U.S. National Library of Medicine (MedlinePlus)
Government medical reference · 2023 · Ceruloplasmin, copper metabolism and Wilson disease testing limitations · Verified: Aug 12, 2026
Ceruloplasmin Blood Test — U.S. National Library of Medicine (MedlinePlus)
Government medical reference · 2025 · Example adult ceruloplasmin reference interval · Verified: Aug 12, 2026