Test Code Billings Clinic: 4378 Protein/Creatinine Ratio, Urine

Performing Laboratory

Billings Clinic Laboratory: Chemistry

Useful For

Evaluation of renal disease

Methodology

This value is calculated from the measured urine protein and urine creatinine.

Specimen Requirements

10 mL from a random urine collection in a urine container.
Send specimen refrigerated.
Do not use preservatives

Storage/Stability

Specimen Type	Temperature	Time
Urine	Refrigerated (preferred)	3 days
	Frozen	1 month

Reject Due To

Bloody specimens
Specimens received containing additives/preservatives

Reference Values

A ratio of >3.5 suggests nephrotic syndrome.

Day(s) Test Set Up

Daily

Test Classification and CPT Coding

82570 - creatinine

84155 - protein

LOINC Code Information

Reporting Name	LOINC Code
Protein, Urine	2888-6
Creatinine, Urine	2161-8
Prot/Creat Ratio	34366-5