Item Value
Test name Homovanillic Acid, 24 hour urine
Available Stat? No
Turn around times Test run Monday-Friday. Turnaround time: 3-6 days.
Performed by Quest
Patient Preparation Patient should avoid alcohol, coffee, tea, tobacco and strenuous exercise and discontinue at least 2 weeks prior to testing any treatment with L-DOPA, which interferes in the assay.
Normal range
3-8 years 0.5-6.7 mg/d
9-12 years 1.1-6.8 mg/d
13-17 years 1.4-7.2 mg/d
> 17 years 1.6-7.5 mg/d
Container type 24 hour urine collection container

Click here for Urine Preservative Requirements
Amount to Collect Entire 24 hour urine output
Collection Instructions Refrigerate container during collection.
Sample type 24 hour urine collection

If you have additional questions regarding this test, please call: 415-353-1667