Creatinine Clearance With Body Surface Area Normalization

CPT: 82575
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  • Clearance, Creatinine

Test Includes

Serum creatinine; urine creatinine

Special Instructions

The test request form must state date and time collection started, date and time collection finished, and patient's height and weight. The request form should state 24-hour urine volume.

Expected Turnaround Time

Within 1 day

Related Information

Related Documents

Specimen Requirements


Serum and urine (24-hour)


1 mL serum and 10 mL aliquot of entire urine collection

Minimum Volume

0.5 mL serum and 0.5 mL urine aliquot


Red-top tube, gel-barrier tube, green-top (heparin) tube, or lavender-top (EDTA) tube and plastic urine container, with or without 6N HCl


Separate serum from cells within 45 minutes of collection. For urine, instruct the patient to void at 8 AM and discard the specimen. Then collect all urine including the final specimen voided at the end of the 24-hour collection period (ie, 8 AM the next morning). Screw the lid on securely. Container must be labeled with patient's full name and date and time for a 24-hour collection. Submit both urine and serum simultaneously. It is preferable to collect the serum at the time the urine collection is completed or when the serum is brought to the draw station. The serum should be collected within 24 hours of the start or finish of the urine collection.

Storage Instructions

Room temperature

Stability Requirements



Room temperature

7 days


14 days


14 days

Freeze/thaw cycles

Stable x3

Patient Preparation

Patient should avoid taking cephalosporins. Have patient drink water before the clearance is begun, and continue good hydration throughout the clearance. If possible, drugs should be stopped beforehand.

Causes for Rejection

No blood creatinine drawn; improper labeling


Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
276024 Creat Clearance, Normalized 34555-3 001370 Creatinine mg/dL 2160-0
276024 Creat Clearance, Normalized 34555-3 013672 Creatinine, Urine mg/dL 2161-8
276024 Creat Clearance, Normalized 34555-3 013227 Creatinine, Ur 24hr mg/24 hr 2162-6
276024 Creat Clearance, Normalized 34555-3 013029 Creatinine Clearance mL/min 2164-2
276024 Creat Clearance, Normalized 34555-3 101140 Patient Weight (lbs) lbs 3141-9
276024 Creat Clearance, Normalized 34555-3 101141 Patient Height (In) in 3137-7
276024 Creat Clearance, Normalized 34555-3 101142 Body Surface Area meters sq 8277-6
276024 Creat Clearance, Normalized 34555-3 101143 Creat Clr (Corr.) mL/min 2164-2
276024 Creat Clearance, Normalized 34555-3 100779 eGFR mL/min/1.73 98979-8

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