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Creatinine, Body Fluid, Plasma, Serum, or Urine
Test Code397
CPT Codes
82565-Plasma or serum (if appropriate); 82570-Body fluid or urine (if appropriate)
Preferred Specimen
Submit only 1 of the following specimens:
Body Fluid
Container/Tube: Sterile vial(s)
Specimen Volume: 0.5 mL of body fluid
Note: 1. Indicate specimen source. 2. Label specimen appropriately (body fluid).
Plasma
Container/Tube: Green-top (heparin) tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5 mL) of plasma
Collection Instructions: Avoid hemolysis.
Note: 1. Indicate plasma. 2. Label specimen appropriately (plasma).
Serum
Container/Tube: Serum gel tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5 mL) of serum
Collection Instructions: Avoid hemolysis.
Note: 1. Indicate serum. 2. Label specimen appropriately (serum).
Urine
Container/Tube: Plastic urine container(s)
Specimen Volume: 25 mL from a 24-hour urine collection
Collection Instructions: No preservative
Note: 1. 24-Hour volume is required. 2. Follow instructions in Urine Collection in Special Instructions. 3. Indicate urine. 4. Label specimen appropriately (urine).
Body Fluid
Container/Tube: Sterile vial(s)
Specimen Volume: 0.5 mL of body fluid
Note: 1. Indicate specimen source. 2. Label specimen appropriately (body fluid).
Plasma
Container/Tube: Green-top (heparin) tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5 mL) of plasma
Collection Instructions: Avoid hemolysis.
Note: 1. Indicate plasma. 2. Label specimen appropriately (plasma).
Serum
Container/Tube: Serum gel tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5 mL) of serum
Collection Instructions: Avoid hemolysis.
Note: 1. Indicate serum. 2. Label specimen appropriately (serum).
Urine
Container/Tube: Plastic urine container(s)
Specimen Volume: 25 mL from a 24-hour urine collection
Collection Instructions: No preservative
Note: 1. 24-Hour volume is required. 2. Follow instructions in Urine Collection in Special Instructions. 3. Indicate urine. 4. Label specimen appropriately (urine).
Minimum Volume
Pediatric volume: 0.2 mL
Instructions
Venipuncture should occur before drug adminstration of NAC or Metamizole due to potential for falsely depressed results.
Transport Temperature
Refrigerate
Methodology
Enzymatic
Setup Schedule
Monday through Sunday
Reference Range
Body Fluid
No established reference values
Plasma or Serum
Males
0-30 days: 0.51-1.20 mg/dL
1 month-5 years: <0.50 mg/dL
5-6 years: <0.60 mg/dL
6-7 years: <0.70 mg/dL
7-8 years: <0.80 mg/dL
8-9 years: <0.90 mg/dL
9-10 years: <1.00 mg/dL
10-18 years: <1.20 mg/dL
>=19 years: 0.67-1.17 mg/dL
Females
0-30 days: 0.51-1.20 mg/dL
1 month-5 years: <0.50 mg/dL
5-6 years: <0.60 mg/dL
6-7 years: <0.70 mg/dL
7-8 years: <0.80 mg/dL
8-9 years: <0.90 mg/dL
9-10 years: <1.00 mg/dL
10-18 years: <1.20 mg/dL
>=19 years: 0.51-0.95 mg/dL
URINE
Males: 0.87-2.41 g/24 hours
Females: 0.67-1.59 g/24 hours
eGFR >60 mL/min/1.72m2
No established reference values
Plasma or Serum
Males
0-30 days: 0.51-1.20 mg/dL
1 month-5 years: <0.50 mg/dL
5-6 years: <0.60 mg/dL
6-7 years: <0.70 mg/dL
7-8 years: <0.80 mg/dL
8-9 years: <0.90 mg/dL
9-10 years: <1.00 mg/dL
10-18 years: <1.20 mg/dL
>=19 years: 0.67-1.17 mg/dL
Females
0-30 days: 0.51-1.20 mg/dL
1 month-5 years: <0.50 mg/dL
5-6 years: <0.60 mg/dL
6-7 years: <0.70 mg/dL
7-8 years: <0.80 mg/dL
8-9 years: <0.90 mg/dL
9-10 years: <1.00 mg/dL
10-18 years: <1.20 mg/dL
>=19 years: 0.51-0.95 mg/dL
URINE
Males: 0.87-2.41 g/24 hours
Females: 0.67-1.59 g/24 hours
eGFR >60 mL/min/1.72m2
Clinical Significance
Useful as an index of renal function, particularly of glomerular filtration. Plasma or serum creatinine on adults (18 years or older) includes eGFR result calculated using the MDRD Study equation.
Performed By
CoxHealth
