The 5-hydroxyindoleacetic acid (5-HIAA) urine test is used to help diagnose and monitor carcinoid tumors. It may be ordered by itself or along with a blood serotonin and/or chromogranin A level. 5-HIAA is the primary metabolite of serotonin that is excreted in the urine.
Inform your doctor if you are on any medications, have any allergies or underlying medical conditions before your 5 Hiaa Blood Plasma. Your doctor will give specific instructions depending on your condition on how to prepare for 5 Hiaa Blood Plasma.
Fasting is typically required before your test. Your doctor will ask you to stop certain foods and medications that alter 5HIAA 72 hrs before testing.
| Gender | Age groups | Value |
| UNISEX | All age groups | 0 - 22np/ml |