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Test ID ELPN Electrolyte Panel, Serum

Useful For

See Individual Mayo Test IDs

Method Name

NACCL, KCCL, CL: Potentiometric/Indirect Ion-Selective Electrode

HCO3: Photometric/Enzymatic

CREAZ: Enzymatic Colorimetric Assay

BUN: Photometric/Urease

AGAP: Calculation

GLURA: Photometric/Hexokinase

Reporting Name

Electrolyte Panel, S

Specimen Type


Specimen Required


Preferred: Serum gel

Acceptable: Red top

Specimen Volume: 0.5 mL

Collection Instructions:

1. Serum gel tubes should be centrifuged within 2 hours of collection.

2. Red-top tubes should be centrifuged and aliquoted within 2 hours of collection.

Additional Information: Patient's age and sex are required.

Specimen Minimum Volume

0.25 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Refrigerated 24 hours

Reference Values


<1 year: not established

≥1 year: 135-145 mmol/L



<1 year: not established

≥1 year: 3.6-5.2 mmol/L



<1 year: not established

1-17 years: 102-112 mmol/L

≥18 years: 98-107 mmol/L




<1 year: not established

1-2 years: 0.1–0.4mg/dL

3-4 years: 0.1-0.5 mg/dL

5-9 years: 0.2–0.6 mg/dL

10-11 years: 0.3–0.7 mg/dL

12-13 years: 0.4–0.8 mg/dL

14-15 years: 0.5–0.9 mg/dL

≥16 years: 0.8–1.3 mg/dL


<1 year: not established

1-3 years: 0.1–0.4 mg/dL

4-5 years: 0.2–0.5 mg/dL

6-8 years: 0.3–0.6 mg/dL

9-15 years: 0.4–0.7 mg/dL

≥16 years: 0.6–1.1 mg/dL



>60 mL/min/1.73 m(2)

Note: eGFR results will not be calculated for patients <17 or >70 years old




<1 year: not established

1-17 years: 7-20 mg/dL

≥18 years: 8-24 mg/dL


<12 months: not established

1-17 years: 7-20 mg/dL

≥18 years: 6-21 mg/dL




<1 year: not established

1-2 years: 17-25 mmol/L

3 years: 18-26 mmol/L

4-5 years: 19-27 mmol/L

6-7 years: 20-28 mmol/L

8-17 years: 21-29 mmol/L

≥18 years: 22-29 mmol/L


<1 year: not established

1-3 years: 18-25 mmol/L

4-5 years: 19-26 mmol/L

6-7 years: 20-27 mmol/L

8-9 years: 21-28 mmol/L

≥10 years: 22-29 mmol/L



<1 year: not established

≥1 year: 70-140 mg/dL

Day(s) and Time(s) Performed

Monday through Sunday; Continuously

Performing Laboratory

Mayo Medical Laboratories in Rochester

CPT Code Information

80051-Electrolyte panel (if all 4 are performed)


82374-Carbon dioxide (if all 4 are not performed)

82435-Chloride (if all 4 are not performed)


84132-Potassium (if all 4 are not performed)

84295-Sodium (if all 4 are not performed)

84520-Urea nitrogen; quantitative

LOINC Code Information

Test ID Test Order Name Order LOINC Value
ELPN Electrolyte Panel, S In Process


Result ID Test Result Name Result LOINC Value
AGAP Anion Gap 33037-3
BUN Bld Urea Nitrog(BUN), S 3094-0
CL Chloride, S 2075-0
GLURA Glucose, Random, S 2345-7
HCO3 Bicarbonate, S 1963-8
KCCL Potassium, S 2823-3
NACCL Sodium, S 2951-2
CREAC Creatinine, S 2160-0
EGFN eGFR-Non African American 48642-3
EGFA eGFR-African American 48643-1

Test Classification

This test has been cleared or approved by the U.S. Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

Profile Information

Test ID Reporting Name Available Separately Always Performed
NACCL Sodium, S Yes Yes
KCCL Potassium, S Yes Yes
CL Chloride, S Yes Yes
HCO3 Bicarbonate, S Yes Yes
CREAZ Creatinine with eGFR, S Yes Yes
BUN Bld Urea Nitrog(BUN), S Yes Yes
AGAP Anion Gap No Yes
GLURA Glucose, Random, S Yes Yes