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23139 Uric Acid/Creatinine Ratio, Urine

Uric Acid/Creatinine Ratio, Urine
Test Code: URIC-CR
Synonyms/Keywords
Uric Acid/ Creat Ratio
Test Components
Urine Uric Acid and 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 Jug
Urine Container​
 ​ 10 mL aliquot​ 1 mL aliquot​ ​
Collection Processing Instructions
Aliquot from a second-morning random urine collected preferably between 8 - 11 am.
For untrained children, collect between 6 am - 11 am.
No preservative is required.​
Specimen Stability Information
Specimen Type Temperature Time
Urine​ - No Preservative ​ Ambient 2 hours
​Refrigerate ​4 days
​Urine - With Preservative ​Refrigerate ​7 days
Rejection Criteria
Acidified urine
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield​ Monday through Sunday​ 6-8 hours​ Uricase & Jaffe reaction/Beckman AU
Reference Range Information
Performing Location Reference Range
Marshfield​ 0-6 months:   1.18-2.38 mg/mg
7 mo-12 mo:  1.04-2.23 mg/mg
       1-2 yrs:  0.74-2.08 mg/mg
       2-3 yrs:  0.69-1.93 mg/mg
       4-5 yrs:  0.59-1.64 mg/mg
       6-7 yrs:  0.44-1.19 mg/mg
     8-10 yrs:  0.38-0.83 mg/mg
   11-14 yrs:  0.29-0.65 mg/mg
    >=14 yrs:  0.33-0.57 mg/mg​
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
84560 ​ ​ ​ Uric acid ​ ​
82570​ ​ ​  Creatinine​ ​
Synonyms/Keywords
Uric Acid/ Creat Ratio
Test Components
Urine Uric Acid and Creatinine​
Ordering Applications
Ordering Application Description
​Centricity ​Uric Acid/Creatinine Ratio
​Cerner ​Uric Acid/Creatinine Urine Ratio
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
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 Jug
Urine Container​
 ​ 10 mL aliquot​ 1 mL aliquot​ ​
Collection Processing
Aliquot from a second-morning random urine collected preferably between 8 - 11 am.
For untrained children, collect between 6 am - 11 am.
No preservative is required.​
Specimen Stability Information
Specimen Type Temperature Time
Urine​ - No Preservative ​ Ambient 2 hours
​Refrigerate ​4 days
​Urine - With Preservative ​Refrigerate ​7 days
Rejection Criteria
Acidified urine
Test Components
Urine Uric Acid and Creatinine​
Reference Range Information
Performing Location Reference Range
Marshfield​ 0-6 months:   1.18-2.38 mg/mg
7 mo-12 mo:  1.04-2.23 mg/mg
       1-2 yrs:  0.74-2.08 mg/mg
       2-3 yrs:  0.69-1.93 mg/mg
       4-5 yrs:  0.59-1.64 mg/mg
       6-7 yrs:  0.44-1.19 mg/mg
     8-10 yrs:  0.38-0.83 mg/mg
   11-14 yrs:  0.29-0.65 mg/mg
    >=14 yrs:  0.33-0.57 mg/mg​
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield​ Monday through Sunday​ 6-8 hours​ Uricase & Jaffe reaction/Beckman AU
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
84560 ​ ​ ​ Uric acid ​ ​
82570​ ​ ​  Creatinine​ ​
For most current information refer to the Marshfield Laboratory online reference manual.