Magnesium, 24-Hour Urine with Creatinine

Test Code

625

CPT Code(s)

82570, 83735

CPT Code is subject to a Medicare Limited Coverage Policy and may require a signed ABN when ordering.

Test Code

625

CPT Code(s)

82570, 83735

CPT Code is subject to a Medicare Limited Coverage Policy and may require a signed ABN when ordering.

Not offered in Quest Nichols Institute - Chantilly, VA | Quest Diagnostics Nichols Institute (IFD) – San Juan Capistrano. Please provide SERVICE AREA INFORMATION to find available tests you can order.

In-home collection is not available in your area through Quest Mobile.

Clinical Significance

Magnesium, 24-Hour Urine with Creatinine

Test Resources

None found for this test
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Test Details

Includes

CPT code 81050 may be added at an additional charge for volume measurement

Methodology

Spectrophotometry (SP)

Reference Range(s)

Magnesium, 24-Hour Urine

Male	28-180 mg/24 h
Female	18-130 mg/24 h

Magnesium, 24-Hour Urine

Male	16-90 mg/g creat
Female	30-135 mg/g creat

Creatinine, 24-Hour Urine

<3 Years	Not established
3-8 Years	0.10-0.80 g/24 h
9-12 Years	0.20-1.40 g/24 h
13-17 Years	0.40-1.90 g/24 h
>17 Years	0.50-2.15 g/24 h

LOINC® Codes, Performing Laboratory

Service Area must be determined

Includes

CPT code 81050 may be added at an additional charge for volume measurement

Methodology

Spectrophotometry (SP)

Reference Range(s)

Magnesium, 24-Hour Urine

Male	28-180 mg/24 h
Female	18-130 mg/24 h

Magnesium, 24-Hour Urine

Male	16-90 mg/g creat
Female	30-135 mg/g creat

Creatinine, 24-Hour Urine

<3 Years	Not established
3-8 Years	0.10-0.80 g/24 h
9-12 Years	0.20-1.40 g/24 h
13-17 Years	0.40-1.90 g/24 h
>17 Years	0.50-2.15 g/24 h

LOINC® Codes, Performing Laboratory

Service Area must be determined

Preferred Specimen(s)

10 mL urine collected in 24-hour urine container

Alternative Specimen(s)

10 mL concentrated Glacial acetic acid • 10 g boric acid
Acceptable to add preservative after collection

Minimum Volume

1 mL

Collection Instructions

Collect urine with 25 mL of 6N HCl to maintain a pH <3. Do not include first morning specimen; collect all subsequent voidings. The last sample collected should be the first morning specimen voided the following morning at the same time as the previous morning's first voiding. Record 24-hour urine volume on test requisition and urine vial.

Transport Container

Sterile screw-cap vial

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 4 days
Refrigerated: 7 days
Frozen: 90 days

Setup Schedule

Service Area must be determined

Preferred Specimen(s)

10 mL urine collected in 24-hour urine container

Alternative Specimen(s)

10 mL concentrated Glacial acetic acid • 10 g boric acid
Acceptable to add preservative after collection

Minimum Volume

1 mL

Collection Instructions

Transport Container

Sterile screw-cap vial

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 4 days
Refrigerated: 7 days
Frozen: 90 days

Setup Schedule

Service Area must be determined

In-home collection is not available in your area through Quest Mobile.

Test Details

Clinical Significance

Test Resources

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 guidance 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.

This material contains content from LOINC® (http://loinc.org). The LOINC Table, LOINC Table Core are copyright © 1995-2019, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license.

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