HOMOVANILLIC ACID (HVA) 24 HR URINE
General Information
HLAB/HOL Code: HVA
UPHSM LIS Test #: 620
Schedule: Monday - Saturday
Testing Time: 2 days
Testing Lab: Mayo Labs
UPHSM LIS Test #: 620
Schedule: Monday - Saturday
Testing Time: 2 days
Testing Lab: Mayo Labs
Specimen Info
Only 1 specimen type required, unless otherwise specified
Volume: 6.0 mL of 24 hour Urine specimen
Temperature: Refrigerate
Tube Type: 1 10 mL Urine tube
Collection Info:
20 mL from a 24-hour urine collection. Add 25 mL of 50% acetic acid as preservative at start of collection. Use 15 mL of 50% acetic acid for children <5 years old. This preservative is intended to achieve a pH of between approximately 2.0 and 4.0. The sensitivity of the test is greater on a 24 hour specimen than on random specimens. Send specimen refrigerated (keep specimen cool with frozen coolant April to October, refrigerated coolant November to March).
NOTE:
1. PATIENT'S AGE AND 24-HOUR VOLUME ARE REQUIRED ON REQUEST FORM FOR PROCESSING.
2. Levodopa interferes with the procedure; it should be discontinued at least 2 weeks prior to collection of specimen.
Temperature: Refrigerate
Tube Type: 1 10 mL Urine tube
Collection Info:
20 mL from a 24-hour urine collection. Add 25 mL of 50% acetic acid as preservative at start of collection. Use 15 mL of 50% acetic acid for children <5 years old. This preservative is intended to achieve a pH of between approximately 2.0 and 4.0. The sensitivity of the test is greater on a 24 hour specimen than on random specimens. Send specimen refrigerated (keep specimen cool with frozen coolant April to October, refrigerated coolant November to March).
NOTE:
1. PATIENT'S AGE AND 24-HOUR VOLUME ARE REQUIRED ON REQUEST FORM FOR PROCESSING.
2. Levodopa interferes with the procedure; it should be discontinued at least 2 weeks prior to collection of specimen.
Methods
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
CPT Codes
83150
* The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding
is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.
Reference Range
Adults: <8 mg/24 hours
Children (results reported in mg/g creatinine)
<1 year: <35.0
1 year: <30.0
2-4 years: <25.0
5-9 years: <15.0
10-14 years: <9.0
Children (results reported in mg/g creatinine)
<1 year: <35.0
1 year: <30.0
2-4 years: <25.0
5-9 years: <15.0
10-14 years: <9.0
