HOMOVANILLIC ACID (HVA)

Test Documentation
Specimen Required
Patient Preparation: Abstain from all medication 72 hours prior to collection. Collect 24 hour urine, refrigerate during collection. Mix well and send a 5.0 mL urine aliquot (1.0 mL minimum) refrigerated in a screw-capped plastic urine container. Record total volume on requisition and specimen label.

Alternate Specimen
Random urine

Methodology
Quantitative High Performance Liquid Chromotography - Tandem Mass Spectrometry

Stability
Room Temperature: Unacceptable; Refrigerated: 7 days; Frozen: 14 days

Reference Range
By report

Performed
Sunday, Tuesday-Saturday

Turnaround Time4-6 days
Test CodeUHVA
CPT-4 Code (s)
83150
LOINC Codes
Total volume   19153-6  
HVA volume   53595-5  
HVA per 24 hr   12715-9  
Creatinine 24 hr   2162-6  
HVA Interpretation   49269-4  
HVA ratio to Creatinine   13760-4  
Creatinine per volume   2161-8  
Hours collected   30211-7  

Warde
Medical
Laboratory