Geisinger Medical Laboratories Test Catalog

Order Display Name: Geisinger Epic Procedure Code Or ID CPT Code:  


Geisinger Epic Procedure Code: LAB2997         Geisinger Epic ID: 54321

Specimen type:
Stool, preserved stool
Preferred collection container:
Alternate Collection Container:
Enteric Transport Media (ETM)
10% Neutral Buffered Formalin Container
Specimen required:
C&S Transport Medium filled to fill line or 5 mL liquid stool or 1 teaspoon semi-solid stool in sterile specimen container.

Enteric transport medium, Protofix CLR, 10% formalin, MIF,SAF are also acceptable .Total-FIX is acceptable but not recommended and must be sent to a reference laboratory for testing.
Special notes:
See stool test selection algorithm. Do not contaminate stool specimen with urine. If multiple tests are being ordered on the same specimen, consult test requirements for each test and follow most stringent guidelines.
Patient preparation:
No ingestion of barium, mineral oil, bismuth, antacids, antimalarial agents, or broad-spectrum antibiotics within 7-14 days of testing.

Specimen processing instructions:
Do not centrifuge. Do not aliquot. 
Transport temperature:
C&S Medium, CaryBlair Medium or ETM: 2-8 °C for up to 14 days. Protofix-CLR, 10% formalin, MIF, SAF or Total-Fix: Room temperature or 2-8 °C 60 days. Sterile specimen container: Room temperature 1 hour.
Specimen stability:
C&S Medium, CaryBlair or ETM: 2-8 °C for up to 14 days/ Protofix-CLR, 10% formalin, MIF,SAF or Total-Fix: Room temperature or 2-8 °C 60 days. Sterile specimen container: Room temperature 1 hour.
Rejection criteria:
Stool contaminated with barium, bismuth, etc. Stool preserved in PVA, duodenal aspirates, rectal swabs, unpreserved specimns >1 hour old, duplicate specimens from same day, or specimen collected on inpatient hospitalized >72 hours after admission. Improperly labeled/identified specimens. Expired collection/transport device. Quantity of specimen insufficient. Delay in transport

Reference interval:
Negative for Giardia Specific Antigen and Cryptosporidium Antigen
Critical values/courtesy alerts:
Positive for Giardia Specific Antigen or Cryptosporidium Antigen
CPT code(s):
87329, 87328
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.  The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.
Test includes:
Detection of Giardia Specific Antigen or Cryptospordium parvum Antigen.
Rapid Immunochromatographic Assay
Giardia Stool Antigen Stool Antigen EIA Giardiasis, Crypto, Parasite, Screen
Clinical significance:
Used for the detection of Giardia lamblia and/or Cryptosporidium parvum from patients with limited travel history in geographic areas where Giardia/Cryptosporidium is the most commen enteric parasites. A positive GSA/Cryptospordium test result is indicative of active infection. Giardia lamblia antibody is not useful for detection of active infection. Cryptosporidium is a significant pathogen, particularly for patients who are immunocompromised.
Doctoral Director(s:)
Donna Wolk PhD, D(ABMM), Raquel Martinez, PhD, D(ABMM)    
Review Date: 12/31/2022

Performing Locations

Geisinger Medical Center

Performing laboratory: Microbiology
Technical Lead: Francis Tomashefski
Frequency: Daily, 2nd shift
Performed STAT? No
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