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HelpTest Code LAB827 Tryptase, Serum
Additional Codes
Mayo Test Code: TRYPT
Useful For
Evaluation of individuals with suspected mast cell activation, which may occur as a result of anaphylaxis or allergen challenge
Evaluation of patients with suspected cutaneous or systemic mastocytosis
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
SerumSpecimen Required
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 0.5 mL
Collection Instructions: Centrifuge and aliquot serum into plastic vial
Additional Information: Tryptase degenerates very quickly when left in the presence of red blood cells.
Specimen Minimum Volume
0.2 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Frozen (preferred) | 14 days | |
| Refrigerated | 7 days |
Reference Values
<11.5 ng/mL
Day(s) Performed
Monday through Friday
Test Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.CPT Code Information
83520
Report Available
2 to 5 daysReject Due To
| Gross hemolysis | OK |
| Gross lipemia | OK |
| Gross icterus | OK |
Method Name
Fluorescence Enzyme Immunoassay (FEIA)
Forms
If not ordering electronically, complete, print, and send a General Request (T239) with the specimen.
Testing Algorithm
For more information, see Mast Cell Disorder: Diagnostic Algorithm, Bone Marrow