Giardia/Cryptosporidium Antigen, Feces

Test Code

CPT Codes
87328, 87329

Preferred Specimen
  • Para-Pak Formalin Vial (Pink lid) - Fill to red line on vial.
 Microbiology Specimen Collection Guide

Other Acceptable Specimens
Stool - Submit one of the following:
  • Para-Pak C&S Vial (Orange lid) - Fill to red line on vial.
  • 5 gm unpreserved stool in sterile screw-capped container.


A copy of the Stool Collection Patient Instructions (English / Spanish) should be given to the outpatient or as follows:

  • Collect stool sample and add to pink top vial (Para-Pak 10% formalin).
  • Add stool up to red line indicated on vial label.
  • Twist cap on tightly and shake container well.
  • Label each container (not the lid) with two patient identifiers (full name, DOB or MR), date and time of collection.
  • If multiple specimens are submitted, they must be collected at least 1 day apart.
  • Transport to lab at room temperature.

Specimen Stability
Specimen Type Temperature Time
Stool in Formalin Vial (Pink) Ambient 2 months
Stool in C&S Vial (Orange) Ambient 2 weeks
Unpreserved Stool Refrigerate 2 hour

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Stool received in PVA vial (Gray lid)

Enzyme Immunoassay (EIA)

Setup Schedule
Monday through Sunday; Continuously

Report Available
Same day

Reference Range

Performing Laboratory
McKee Medical Center - Microbiology/Molecular Laboratory

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.