Ordering Recommendation

Monitor inflammation caused by asthma. Optimize corticosteroid treatment in asthmatic patients.

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation

Serum separator tube (SST).

Specimen Preparation

Collect blood by venipuncture using Serum separator tube (SST). Gently invert the tube several times. Do not shake or vortex the tube. Release ECP by clotting for 60-120 minutes at room temperature (20-24° C). Centrifuge at 1000-1300 x g for 10 minutes at room temperature. Transfer 1ml of serum to an ARUP Standard Transport Tube (Min: 0.25 mL)

Storage/Transport Temperature

Frozen, Also acceptable; Refrigerated

Unacceptable Conditions

Plasma, hemolyzed, lipemic and icteric serum cannot be used.


After separation from cells; Ambient: 48 hours, Refrigerated: 5 Days, Frozen: 30 Days


Quantitative Fluorescent Enzyme Immunoassay




1-8 days

Reference Interval

Less than 17.8 ug/L

Interpretive Data

This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.

Compliance Category

Laboratory Developed Test (LDT)


Hotline History


CPT Codes



Component Test Code* Component Chart Name LOINC
3000538 Eosinophil Cationic Protein 25638-8
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.


Eosinophil Cationic Protein (ECP)