Creatinine

Creatinine

Test Code

375

CPT Code(s)

82565

Test Code

375

CPT Code(s)

82565

In-home collection may be available in your area for purchase through Quest Mobile.

Clinical Significance

Creatinine - Serum creatinine is useful in the evaluation of kidney function and in monitoring renal dialysis. A serum creatinine result within the reference range does not rule out renal function impairment: serum creatinine is not sensitive to early renal damage since it varies with age, gender and ethnic background. The impact of these variables can be reduced by an estimation of the glomerular filtration rate using an equation that includes serum creatinine, age and gender.

Test Resources

Test Details

Includes

eGFR

Methodology

Spectrophotometry (SP)

Reference Range(s)

Creatinine
Age	Male (mg/dL)	Female (mg/dL)
≤2 days	0.79-1.58	0.79-1.58
3-27 days	0.35-1.23	0.35-1.23
1 month-9 years	0.20-0.73	0.20-0.73
10-12 years	0.30-0.78	0.30-0.78
13-15 years	0.40-1.05	0.40-1.00
16-17 years	0.60-1.20	0.50-1.00
18-29 years	0.60-1.24	0.50-0.96
30-39 years	0.60-1.26	0.50-0.97
40-49 years	0.60-1.29	0.50-0.99
50-59 years	0.70-1.30	0.50-1.03
60-69 years	0.70-1.35	0.50-1.05
70-79 years	0.70-1.28	0.60-1.00
≥80 years	0.70-1.22	0.60-0.95

For patients >49 years of age, the upper reference limit for creatinine is approximately 13% higher for people identified as African-American.

eGFR

≥60 mL/min/1.73m²

LOINC® Codes, Performing Laboratory

Service Area must be determined

Includes

eGFR

Methodology

Spectrophotometry (SP)

Reference Range(s)

Creatinine
Age	Male (mg/dL)	Female (mg/dL)
≤2 days	0.79-1.58	0.79-1.58
3-27 days	0.35-1.23	0.35-1.23
1 month-9 years	0.20-0.73	0.20-0.73
10-12 years	0.30-0.78	0.30-0.78
13-15 years	0.40-1.05	0.40-1.00
16-17 years	0.60-1.20	0.50-1.00
18-29 years	0.60-1.24	0.50-0.96
30-39 years	0.60-1.26	0.50-0.97
40-49 years	0.60-1.29	0.50-0.99
50-59 years	0.70-1.30	0.50-1.03
60-69 years	0.70-1.35	0.50-1.05
70-79 years	0.70-1.28	0.60-1.00
≥80 years	0.70-1.22	0.60-0.95

For patients >49 years of age, the upper reference limit for creatinine is approximately 13% higher for people identified as African-American.

eGFR

≥60 mL/min/1.73m²

LOINC® Codes, Performing Laboratory

Service Area must be determined

Preferred Specimen(s)

1 mL serum

Alternative Specimen(s)

Sodium heparin (green-top) tube • Lithium heparin (green-top) tube

Minimum Volume

0.5 mL

Transport Container

Serum separator tube (SST)

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 7 days
Refrigerated: 7 days
Frozen: 28 days

Reject Criteria

Grossly icteric • Anticoagulants other than heparin

Setup Schedule

Service Area must be determined

Preferred Specimen(s)

1 mL serum

Alternative Specimen(s)

Sodium heparin (green-top) tube • Lithium heparin (green-top) tube

Minimum Volume

0.5 mL

Transport Container

Serum separator tube (SST)

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 7 days
Refrigerated: 7 days
Frozen: 28 days

Reject Criteria

Grossly icteric • Anticoagulants other than heparin

Setup Schedule

Service Area must be determined

In-home collection may be available in your area for purchase through Quest Mobile.

Test Details

Clinical Significance

Test Resources

Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

The CPT codes provided are based on AMA guidance and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

This material contains content from LOINC® (http://loinc.org). The LOINC Table, LOINC Table Core are copyright © 1995-2019, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license.

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Reference Range(s)

LOINC® Codes, Performing Laboratory

Methodology

Reference Range(s)

Preferred Specimen(s)

Alternative Specimen(s)

Minimum Volume

Transport Container

Transport Temperature

Specimen Stability

Reject Criteria

Setup Schedule

Clinical Significance

Test Resources