Clinical Significance for NETs:
The ISI plasma 5-HIAA assay correlates well with the 24-hour urinary 5-HIAA assays. This test has been clinically validated for NET patients who previously relied on the 24-hour urinary 5-HIAA. The plasma 5-HIAA saves time, alleviates the need to collect urine in a collection container, and provides equivalent clinical information. The CPT code for this test is 82542.

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