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Urine Homovanillic Acid, Random
MessagePatient Preparation: It is preferable for the patient to be off medications for three days prior to collection. However, common antihypertensives (diuretics, ACE inhibitors, calcium channel blockers, alpha and beta blockers) cause minimal or no interference. Patient should avoid alcohol, coffee, tea, tobacco and strenuous exercise prior to collection. random urine collected in a sterile leak-proof container
Test Code
LAB401 HVAUR
Alias/See Also
HVAUR
CPT Codes
82570| 83150
Includes
Patient Preparation: It is preferable for the patient to be off medications for three days prior to collection. However, common antihypertensives (diuretics, ACE inhibitors, calcium channel blockers, alpha and beta blockers) cause minimal or no interference. Patient should avoid alcohol, coffee, tea, tobacco and strenuous exercise prior to collection.@BKRCERMSGREFRESH(2302793)@ @BKRCERMSGREFRESH(2302794)@
Instructions
Processing Instructions (Lab use only): After urine collection, add 6N HCl to maintain a pH below 3. Urine without preservative is acceptable if pH is below 6 and the sample is shipped frozen.Minimum Testing Volume: 0.5 mL Urine Transport Temperature: Preserved: AmbientUnpreserved: Frozen Stability: Ambient: 7 DaysRefrigerated : 7 DaysFrozen: 28 Days Causes for Rejection: pH >3.0 and received unfrozen
Report Available
10-Days
Clinical Significance
1230170943
Last Updated: May 18, 2026