Starting at
$109
Up to $249
Save up to $140
Walk-In Lab
Lowest PriceOnlineSerotonin Blood Test
The Serotonin Blood Test is ordered to help diagnose and monitor treatment for a serotonin-secreting carcinoid tumor.
Updated 7/22/2025
$109
Order TestDirectLabs
OnlineSerotonin, Serum
Helps diagnose a carcinoid tumor that produces serotonin
Updated 7/22/2025
$249
Order Test