Sign in →

Test Code LAB66 Creatinine

Additional Codes

CPT Code: 82565

Methodology

This battery is also included in Basic Metabolic Panel (LAB15); Comprehensive Metabolic Panel (LAB17); Creatinine Clearance, Plasma or Serum and Urine (LAB818); and Renal Function Panel (LAB19).

Performing Laboratory

TidalHealth Peninsula Regional - Core Laboratory: Chemistry

Specimen Requirements

Submit only 1 of the following specimens:

 

Plasma
Draw blood in a green-top (lithium heparin) tube. Spin down and send 2 mL of lithium heparin plasma. Hemolyzed specimen is not acceptable.
Note: 1. Indicate plasma.

2. Label specimen appropriately (plasma).

 

Serum
Draw blood in a gold-top serum gel tube. Spin down and send 2 mL of serum. Hemolyzed specimen is not acceptable.

Note: 1. Indicate serum.

2. Label specimen appropriately (serum).

Reference Values

Creatinine

Males

0-11 months: 0.30-1.00 mg/dL

12 months-11 years: 0.30-0.70 mg/dL

12-17 years: 0.50-1.00 mg/dL

≥18 years: 0.64-1.27 mg/dL

Females

0-11 months: 0.30-1.00 mg/dL

12 months-11 years: 0.30-0.70 mg/dL

12-17 years: 0.50-1.00 mg/dL

≥ 18 years: 0.44-1.03 mg/dL

 

Note: Serum acetoacetate will lower creatinine results. Acetone and α-ketobutyric acid will elevate results.

 

Estimated Glomerular Filtration Rate (eGFR) by CKD-EPI Equation

 

eGFR Reference Range: ≥60 mL/min/1.73 m2

 

When calculating eGFR, the equation takes into account the patient’s serum creatinine, age, sex, and race. African-American and non-African American eGFR values will be reported from the eGFR calculation.

 

eGFR will not be reported for patients <18 years of age. eGFR by this equation has been shown to be valid for diabetic patients but not for pregnant patients. It is not recommended using this for drug dosing - for drug dosing use the CG equation.

 

According to the Kidney Disease: Improving Global Outcomes (KDIGO) CKD work group, chronic kidney disease (CKD) is defined as the abnormalities of kidney structure or function, present for more than 3 months, with implications for health. CKD should be classified by cause, GFR category, and albuminuria category.

 

KDIGO guidelines provide the following GFR categories:

 

Stage

Terms

GFR mL/min/1.73 m

G1*

Normal or high

90

G2*

Mildly decreased

60 to 89

G3a

Mildly to moderately decreased

45 to 59

G3b

Moderately to severely decreased

30-44

G4

Severely decreased

15-29

G5

Kidney failure

<15

 

*In the absence of evidence of kidney damage, neither G1 nor G2 fulfill criteria for CKD.

 

Clinical Reference

 

Kidney Disease: Improving Global Outcomes (KDIGO) CKD Work Group. KDIGO 2012 clinical practice guideline for the evaluation and management of chronic kidney disease. Kidney Int Suppl 2013;3:1-150

 

KDOQI US Commentary on the 2012 KDIGO Clinical Practice Guideline for the Evaluation and Management of CKD. Am J Kidney Dis 2014;63:713-735

Additional Information

Available STAT