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Test Name:

CREATININE

Test Code:

2120151

Alias:

LAB66

CPT Code(s):

82565

Test Includes:

Creatinine

GFR (African American)

GFR (Others)

Preferred Specimen:

1.0 mL serum

Container:

SST (gold)

Alternate Container:

Lithium Heparin (lt green)

Minimum Volume:

0.3 mL serum or plasma

This volume does not allow for repeat testing.

Collection Instructions:

Allow specimen to completely clot (this can take up to 60 minutes). Centrifuge for 15 minutes. If the specimen is collected in a tube without a gel barrier, centrifuge and transfer the plasma into a properly labeled transfer tube within 2 hours of collection.

Transport Temperature:

Refrigerated

Stability:

Refrigerated: 7 days

Frozen: 3 months

Limitations:

The presence of ketone bodies can cause artificially high results in serum and plasma.

Schedule:

Set up: Daily; Results in 24-48 hours

Method:

Colorimetric Assay

Clinical Significance:

Creatinine measurements are used in the diagnosis and treatment of renal diseases, in monitoring renal dialysis, and as a calculation basis for measuring other urine analytes. The GFR is calculated for every creatinine result. Reporting of the calculated glomerular filtratuion rate (GFR) is recommended by the National Kidney Foundation for use in recognition,treatment, and prevention of chronic kidney disease. The GFR is the best overall indicator of kidney function. AMONG PATIENTS WITH CHRONIC KIDNEY DISEASE, the stage of disease should be assigned based on the following classification. Chronic Kidney Disease is defined as either kidney damage or GFR <60ml/min/1.73m2 for >=3 months. Kidney damage is defined as pathologic abnormalities or markers of damage, including abnormalities in blood, urine tests or imaging studies. Classification of stages of CKD (Chronic Kidney Disease): Stage 1: Kidney damage with normal or increased GFR. GFR>=90 ml/min/1.73m2 Stage 2: Kidney damage with mild reduction of GFR. GFR 60-89 ml/min/1.73m2 Stage 3: Moderate reduction of GFR. GFR 30-59 ml/min/1.73m2 Stage 4: Severe reduction of GFR. GFR 15-29 ml/min/1.73m2 Stage 5: Kidney failure. GFR <15 ml/min/1.73m2

In patients younger than 18 years the additional parameter of height is required for eGFR. Use the Schwartz GFR calculator at:
NIH.gov Bedside IDMS-Traceable Schwartz GFR Calculator for Children

Reference Ranges:

Updated 3/19/2024

Reference Range Table

Result	Units	Gender	Age	Range
GFR(African American)	mL/min/1.73 m2	Both	0 Year - 999 Year	60-300
GFR(Others)	mL/min/1.73 m2	Both	0 Year - 999 Year	60-300
Creatinine	mg/dL	Both	0 Day - 15 Day	0.3-0.9
Creatinine	mg/dL	Both	15 Day - 2 Year	0.1-0.4
Creatinine	mg/dL	Both	2 Year - 5 Year	0.2-0.4
Creatinine	mg/dL	Both	5 Year - 12 Year	0.3-0.6
Creatinine	mg/dL	Both	12 Year - 15 Year	0.5-0.8
Creatinine	mg/dL	Female	15 Year - 19 Year	0.5-0.8
Creatinine	mg/dL	Male	15 Year - 19 Year	0.6-1.1
Creatinine	mg/dL	Both	19 Year - 999 Year	0.6-1.30

Health Lab Test Code Build Information

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The CPT codes included in this publication are in accordance with Current Procedural Terminology, a publication of the American Medical Association. CPT codes are provided here for the convenience of our clients; however, correct coding often varies from one carrier to another, and HealthLab may bill specific carriers using codes other than those shown. Clients who bill for services should verify the code(s) with the applicable payor to confirm that their use is appropriate in each case.

Reference Range Table

Health Lab Test Code Build Information

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