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Heavy Metals Panel, 24-Hour Urine

Test Code


CPT Code(s)



Arsenic, Lead, Mercury

Patient Preparation

Avoid seafood consumption for 48 hours prior to collection

Preferred Specimen(s)

7 mL aliquot of a well-mixed 24-hour urine collected in an acid-washed or metal-free container

Minimum Volume

3 mL

Alternative Specimen(s)

Tests performed on a specimen submitted in a non-trace element tube or non acid-washed/non metal-free container may not accurately reflect the patient's level.  If a non-trace element tube/container is received, it will be accepted for testing. However, elevated results shall be reported with a message that re-submission with a trace element tube/container is recommended.

Collection Instructions

Avoid worksite collection. Collect urine in an acid-washed or metal-free plastic container.

See Urine in the Blood, Urine and Stool section of Specimen Collection and Handling.

Transport Container

Acid-washed plastic urine container

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

Room temperature: 48 hours
Refrigerated: 5 days
Frozen: 14 days


Inductively Coupled Plasma/Mass Spectrometry (ICP/MS)

This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Performing Laboratory

Quest Diagnostics Nichols Institute
27027 Tourney Road
Valencia, CA 91355-5386

Setup Schedule

Set up: Tues, Thurs, Sat


Ingestion of seafood within three days of specimen collection can affect results.

Reference Range(s)

Arsenic, 24-Hour Urine ≤80 mcg/L
Lead, 24-Hour Urine <80 mcg/L
Mercury, 24-Hour Urine ≤20 mcg/L

Clinical Significance

Excessive exposure to Heavy Metals can cause acute and chronic toxicity.  Heavy Metals Panel is intended to evaluate and monitor exposure to heavy metals and evaluate the process of detoxification.

LOINC®' Code(s)

The Result and LOINC information listed below should not be used for electronic interface maintenance with Quest Diagnostics. Please contact the Quest Diagnostics Connectivity Help Desk for more information at 800-697-9302.

NOTE: The codes listed in the table below are not orderable Test Codes.

Result NameLOINC CodeComponent Name
80016851ARSENIC, 24 HOUR URINE21074-0Arsenic
80016858MERCURY, 24 HOUR URINE21383-5Mercury
80031800LEAD, 24 HOUR URINE20625-0Lead

Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

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.

LOINC assignment is based on a combination of test attributes, including the method used by the performing laboratory. For tests not performed by Quest Diagnostics, codes are assigned by the performing laboratory.

* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.