Test Directory
| Test Code | |||
| APTS | |||
| Test Name | |||
| APT Test | |||
| CPT Codes | |||
| 83033 | |||
| Expected Turnaround Time | |||
| 1 day | |||
| Clinical Utility | |||
|
Used to differentiate swallowed blood from gastrointestinal hemorrhage in newborns. |
|||
| Specimen and Container Info | |||
|
Preferred Specimen Type: Bloody Stool Alternate Specimen Type: Bloody Gastric Aspirate or Blood-stained Diaper Minimum Acceptable Volume: 0.5 mL of Bloody Stool or Gastric Aspirate Note: This volume does not allow for repeat testing. |
|||
| Transport Instructions | |||
|
Transport to the laboratory at room temperature or refrigerated. |
|||
| Stability Requirements | |||
|
|||
| Causes for Rejection | |||
| No pink color in specimen, i.e. specimen is brown | |||
| Methodology | |||
| Manual | |||
| Reference Intervals | |||
| This test was developed and its performance characteristics determined by Health Network Laboratories. Methodology for this testing is alkaline denaturation. It has not been cleared or approved by the FDA. The laboratory is regulated under CLIA as qualified to perform high-complexity testing. This test is used for clinical purposes. It should not be regarded as investigational or for research. | |||
| Performing Location | |||
| Cedar Crest Hospital | |||
| Testing Schedule | |||
| Routine, daily | |||
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
© 2026 HNL Lab Medicine. All rights reserved.