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Order Code LAB4645 Creatinine, Whole Blood 

Additional Codes

Test Name in EPIC

EPIC Test Code           

Mnemonic

RV CREATININE, WHOLE BLOOD (LAB PERFORMED)

LAB4645

CREA

 

Useful For

Serum creatinine measurement is used in estimating GFR for people with chronic kidney disease (CKD) and those with risk factors for CKD (diabetes, hypertension, cardiovascular disease, and family history of kidney disease)

  • Diagnosing and monitoring treatment of acute and chronic renal diseases
  • Adjusting dosage of renally excreted medications
  • Monitoring renal transplant recipients

Specimen Requirements

Specimen Type: PWhole Blood

Collection Container/Tube:

Preferred:  Green-top (lithium heparin) gel tube 

Acceptable:  Lithium  Heparin Syringe

Specimen Volume: 2 mL

Pediatric (minimum) volume: 0.5 mL

Specimen Stability

Specimen Type Temperature Stability                  
Whole Blood Ambient 30 minutes
  Refrigerated  n/a
  Frozen n/a

Reference Values

  • Male:  0.66 - 1.25 mg/dL
  • Female:  0.52 - 1.04 mg/dL
  • Unspecified: 0.52-1.25 mg/dL
  • Critical value (automatic call-back):  > 5.00 mg/dL

 

GFR CALCULATED (mL/min/1.73 m2)

  • Stage 1:  ≥ 90 mL/min
  • Stage 2:  60 - 89 mL/min
  • Stage 3:  30 - 59 mL/min
  • Stage 4:  15 - 29 mL/min
  • Stage 5:  ≤14 mL/min

When creatinine is ordered, a GFR will automatically be calculated on all patients >18 years old.

The MDRD GFR formula is only valid for adults between ages 18 and 85.

Methodology

Two-point rate

  • Glomerular Filtration Rate (GFR), Estimated: Calculated on patients between 18 and 85 years old.
  • CKD-EPI 2021 equation:  GFR = 142 x min (Scr/K, 1)a  x max (Scr/K, 1)-1.200 x 0.9938age x 1.012 (if non-male) 

Day(s) Test Set Up

Monday through Sunday

Performing Laboratory

Ridgeview Medical Center Laboratory

Two Twelve Medical Center Laboratory

Ridgeview Sibley Medical Center Laboratory

Ridgeview Le Sueur Medical Center Laboratory

Test Classification and CPT Coding

82565 - Creatinine

No CPT code - GFR (calculation)