Days Set Up
Analytic Time

8 hours

MiChart Code
Chloride, 24 HR Urine
Soft Order Code

Test Updated:


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Find a Requisition

All specimens should be accompanied by a requisition.

Submitting Specimens

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MLabs provides all the supplies necessary for the collection of specimens.

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Test Overview

Test Methodology

Potentiometric (ISE)

Test Usage

Evaluate electrolyte composition of urine, electrolyte balance studies

Reference Range

170 - 250 mEq/24 hours (170-250 mMol/24 hours). Random urine collections are reported in units of mmol/L, for which reference values are not established.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Specimen Requirements

Collection Onsite

Collect timed 24-hour or a random urine sample. For a 24 hour collection, instruct patient to void at 8:00am (or 8:00pm) and discard the specimen. Then collect all the urine including the final specimen voided at the end of the 24 hour collection period, i.e., 8:00am (or 8:00pm) the following day. Refrigerate during collection. Transport promptly to the laboratory. Container must be labeled with date and time collection started and finished. Outside of specimen container must be clean and free of smeared or leaking specimen.

Collection Offsite

Collect 24 hour urine specimen with no preservative. Aliquot 5 mL into a plastic urine container and refrigerate. Record total 24 hour urine volume and collection dates/times on request form. Random urine also acceptable.

Normal Volume
5 mL aliquot of 24 hour urine collection or 2 mL aliquot of random urine collection.
Minimum Volume
2 mL aliquot of 24 hour urine collection or 1 mL aliquot of random urine collection.

Billing Information

CPT Code
Pro Fee Code
CHLORU 2078-4, CHLORQ 2079-2

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Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.