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Test ID: FSRAU    
Serotonin Release Assay, Unfractionated Heparin

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Test Classification Provides information regarding the medical device classification for laboratory test kits and reagents. Tests may be classified as cleared or approved by the US Food and Drug Administration (FDA) and used per manufacturer's instructions, or as products that do not undergo full FDA review and approval, and are then labeled as an Analyte Specific Reagent (ASR), Investigation Use Only (IUO) product, or a Research Use Only (RUO) product.

This test was developed and its performance characteristics have been determined by Quest Diagnostics Nichols Institute, San Juan Capistrano. Performance characteristics refer to the analytical performance of the test.

CPT Code Information Provides guidance in determining the appropriate Current Procedural Terminology (CPT) code(s) information for each test or profile. The listed CPT codes reflect Mayo Medical Laboratories interpretation of CPT coding requirements. It is the responsibility of each laboratory to determine correct CPT codes to use for billing.


LOINC® Code Information Provides guidance in determining the Logical Observation Identifiers Names and Codes (LOINC) values for the order and result codes of this test.

Test IDTest Order NameOrder LOINC Code
FSRAUSerotonin Release Assay, Unfractionated HeparinIn Process


Result IDTest Result NameResult LOINC Code
Z3630UFH SRA Result50733-5
Z3631UFH Low Dose, 0.1 IU/mL50728-5
Z3632UFH Low Dose, 0.5 IU/mL74005-0
Z3633UFH High Dose, 100 IU/mL50727-7

LOINC and CPT codes are provided by the performing laboratory.