Test Overview
Test Methodology

See individual tests.

Test Usage

Kidney function panel. See individual tests.

Reference Range *

See individual tests. Estimated Glomerular Filtration Rates (eGFR) for both an African American and a non-African American individual calculated using the MDRD study equation will be reported with serum creatinine levels ordered alone or as part of a panel for patients aged 18 - 100 years. A GFR estimate between 15 and 59 mL/min for >= 3 months is classified as chronic kidney disease (Stage 3 or 4).

Test Limitations

The MDRD formula for estimation of GFR (eGFR) was developed in a population of adults with slowly-declining or stable reduced kidney function. The MDRD formula should not be used to predict eGFR in unstable patients or in children. The GFR estimate can be interpreted accurately only during a steady state of creatinine balance. The GFR estimate will overestimate true GFR if serum creatinine is rising (such as in acute kidney failure) and will underestimate true GFR if serum creatinine is declining (such as in resolution of acute kidney failure). The EGFR should not be used for pharmacy drug dosing.

Test Details
Days Set Up
Daily, 24 hours
Analytic Time

2 hours

Soft Order Code
RENAL
MiChart Code
Renal Function Panel
Synonyms
  • ALBUMIN
  • CALCIUM
  • Chemistry Profile, Renal Function Panel
  • CHLORIDE
  • CO2
  • CREATININE
  • GLUCOSE
  • Kidney Function Survey
  • PHOSPHORUS
  • POSTASSIUM
  • Profile, Renal Function
  • SODIUM
  • UREA NITROGEN
  • Renal Panel
  • ALB
  • CAL
  • CHLOR
  • CREAT
  • GLUC
  • PHOS
  • POT
  • SOD
  • UN
  • EGFR GLOMERULAR FILTRATION RATE
Laboratory
Chemical Pathology
Section
Automation
STAT Availability

STAT requests for this test will be performed on a STAT basis (supervisory staff approval is not required).

Specimen Requirements
Collection Instructions

Collect specimen in an SST tube. Centrifuge within 4 hours of collection, aliquot serum into a plastic vial and refrigerate. If specimen cannot be centrifuged at client site, please arrange for delivery to MLabs within 3 hours of specimen collection.

Alternate Specimen
Red top or Green top (sodium or lithium heparin)tube.
Rejection Criteria
Grossly hemolyzed samples are unacceptable for analysis.
Yellow Top Tube
Normal Volume
1 mL serum
Minimum Volume
0.5 mL serum
Additional Information

Includes: Sodium, Potassium, Chloride, CO2, Glucose, Urea Nitrogen, Creatinine, Calcium, Albumin, Phosphorus, Anion Gap. Each of these tests except the anion gap may be ordered individually. The Jaffe reaction used for creatinine on the Advia 1800 can exhibit a positive bias or interference with a number of different compounds. The most common are high levels of ascorbic acid and certain cephalosporin antibiotics (Cefpirone, Cefoxitin, Cefazolin, and Cephalothin). Patients may exhibit fairly dramatic changes in serum creatinine (0.5 - 1.0 mg/dL increases) if samples happen to be drawn at peak drug levels.

Billing
CPT Code
80069
Fee Code
20544
NY State Approved
No