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Test Code
HISAG
Test Name
Histoplasma Antigen Serum
CPT Codes
87385
Expected Turnaround Time
6 - 12 days
Clinical Utility

Aids the diagnosis of histoplasmosis. Monitoring the histoplasmosis helps determine when treatment can be stopped and to diagnose relapse.
Specimen and Container Info

Specimen Type: Serum

Collection Container: Gold Top, Serum Separator

Alternate Collection Container: Red Top, Plain

Desired Specimen Volume: 4 mL
Collection Instructions
  1. Collect a gold top, serum separator tube via venipuncture.
Processing and Submission Instructions
  1. Allow blood to clot for 30 minutes.
  2. Separate serum from cells.
  3. Transfer 4 mL of serum to a clear aliquot tube (screw cap).
Transport Instructions

Transport to the laboratory refrigerated. 
Stability Requirements

Room Temperature

14 days

Refrigerated

14 days

Frozen

Indefinitely
Methodology
Quantitative Sandwich Enzyme Immunoassay (EIA)
Reference Intervals

See patient report.
Limitations

The result is not intended to be used as the sole means for the clinical diagnosis or patient management decisions.

Cross-reactions are seen with blastomycosis, paracoccidioidomycosis, penicilliosis, less frequently in coccidioidomycosis, rarely in aspergillosis and possibly sporotrichosis.

Sputolysin, sodium hydroxide and potassium hydroxide treatment degrade the analyte detected in the assay.
Alternate Names
  • Histoplasma Ag Quantitative
Reference Lab
Labcorp Of America Holdings
Testing Schedule
Monday-Friday
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.
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