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Test Code N.CREAT CREATININE

Important Note

Include: Age and gender in order to provide the EGFR calculation.

The EGFR will automatically be provided on all orders and panels which include a serum creatinine result. There is no charge for the calculation. The calculation is valid for individuals age 18 to 71 years.

Additional Codes

CREAT.1

CRE

Methodology

Automated Chemistry Analyzer

Specimen Requirements

Specimen Type: Serum or Plasma 
Container/Tube: SST or Lithium Heparin 

Acceptable: Red top 
Specimen Volume: 1 mL (minimum 0.5) 
Collection Instructions:  

  1. Allow specimen to clot completely if a serum tube (SST) was used. 
  2. Separate serum (SST) or plasma (Lithium Heparin) from cells within 24 hours and transport refrigerated. If red top tube is collected, separate serum from cells within 2 hours and place in separate plastic tube. 
  3. Properly label tube with patient's name, DOB, requisition number and type of tube, i.e. LiHep or NaHep etc. 

Specimen Rejection

1. Exceeds stability requirements

2. Unlabeled/mislabeled specimen

Maximum Laboratory Time

24 to 48 hours

Specimen Transport/Stability

Refrigerated: 24 hours on gel, 6 days poured off

Test Classification and CPT Coding

82565

Day(s) Test Set Up

Daily

Reference Ranges

Creatinine                mg/dL
Newborn             0.20 - 0.99
3 days             0.20 - 0.50
2 yrs             0.20 - 0.60
4 yrs             0.20 - 0.70
8 yrs             0.30 - 0.80
11 yrs             0.30 - 0.90
13 yrs             0.30 - 1.10
18 yrs  F             0.44 - 1.00
            M             0.61 - 1.24
Estimated Glomerular Filtration Rate  mL/min/1.73m2                                            
Chronic Kidney Disease         <60
             -if found over 3 month period  
Kidney Failure          <15

*For African Americans, multiply the calculated GFR by 1.21

Critical :  REFER TO LH-W CRITICAL VALUES POLICY