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UW Health SMPH
American Family Children's Hospital

UW Hospital and Clinics Lab Test Directory

Test Name: Occult Blood, Gastric


CPT Code(s): 82273

Methodology: Gastroccult Slide Kit

Clinical Significance: Gastroccult is a rapid screening test for detecting occult blood in vomitus and gastric aspirates.

Days Performed: Daily, 24 hours.

Turnaround Time: Stat: 1 hour.
Routine: 4 hours.

Specimen Requirements

Specimen: Vomitus or gastric aspirate

Collection Instructions: Apply one drop of vomitus or gastric aspirate to gastroccult blood test area.  DO NOT apply sample to the Performance Monitor Area of the card.

Collection Container: Preferred: Gastroccult Kit

Sample Analyzed: Vomitus or gastric aspirate

Specimen Transport: It is recommended that samples be applied to slide immediately after collection. Gastroccult slide may be developed up to 4 days after sample application. Store at room temperature. Transport slide to UWHC Core Laboratory (B4/220).

Unacceptable Criteria: If sample is applied to the Performance Monitor Area of the card, slide is not acceptable.

Stability: Ambient: 4 days
Refrigerated: Not acceptable
Frozen: Not acceptable


Expected Results:


Test Limitations:

The laboratory does not report the pH from the gastroccult slide.

Additional Information:

Gastroccult testing is a screening procedure and cannot be considered conclusive evidence of the presence or absence of GI bleeding. Test results should be used in conjunction with other information relevant to the clinical status of the patient. 


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