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Accreditation Certificates

2026 CAP Certificate

Critical Value Information

Critical Values Policy

General Information

Clinical Requisition Form

Microbiology Requisition Form

Cytology Requisition Form

Pathology Requisition Form

Specimen Transport Pictoral

Marshfield Labs Website

Direct Access Links

Direct Access Information

Mayo Clinic Laboratories

Test Code CRE-RU Creatinine, Urine Random

Synonyms/Keywords

Random Urine Creatinine, Urine Creatinine

Specimen Requirements

Fasting Required	Specimen Type	Preferred Container/Tube	Acceptable Container/Tube	Specimen Volume	Specimen Minimum Volume (allows for 1 repeat)	Pediatric Minimum Volume (no repeat)
No	Urine	Urine Container		10 mL	0.5 mL

Collection/Processing Instructions

Random urine specimen, no preservative.

Other acceptable alternate preservatives include sulfamic acid, 6 N HCl, acetic acid, boric acid, and sodium carbonate.

Specimen Stability Information

Specimen Type	Temperature	Time
Urine - No Preservative	Ambient	2 hours
Urine - No Preservative	Refrigerate	4 days
Urine - With Preservative	Refrigerate	7 days

Reference Range Information

Performing Location	Reference Range
All Performing Sites	Not available

Marshfield Labs Performing Department

Marshfield Labs Chemistry

Performing Information

Performing Location	Day(s) Test Performed	Analytical Time	Methodology/Instrumentation
Beaver Dam	Monday through Sunday	Less than 2 hours	Modified Jaffe Kinetic Fixed Assay/ Beckman AU
Eau Claire	Monday through Sunday	Less than 2 hours	Modified Jaffe Kinetic Fixed Assay/ Beckman AU
Weston	Monday through Sunday	Less than 2 hours	Modified Jaffe Kinetic Fixed Assay/ Beckman AU
Park Falls	Monday through Sunday	Less than 2 hours	Modified Jaffe Kinetic Fixed Assay/ Beckman AU
Ladysmith	Monday through Sunday	Less than 2 hours	Modified Jaffe Kinetic Fixed Assay/ Beckman AU
Rice Lake	Monday through Sunday	Less than 2 hours	Modified Jaffe Kinetic Fixed Assay/ Beckman AU
Marshfield	Monday through Sunday	Less than 2 hours	Modified Jaffe Kinetic Fixed Assay/ Beckman AU
Minocqua	Monday through Sunday	Less than 2 hours	Modified Jaffe Kinetic Fixed Assay/ Beckman AU
Stevens Point	Monday through Sunday	Less than 2 hours	Modified Jaffe Kinetic Fixed Assay/ Beckman AU

CPT Codes

CPT	Modifier (if needed)	Quantity	Description	Comments
82570

Outreach CPT Codes

CPT	Modifier (if needed)	Quantity	Description	Comments
82570

Ordering Applications

Ordering Application	Description
Cerner	Creatinine, Urine Random