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Test ID ELPSR Electrolyte Panel, Serum

Necessary Information

Patient's age and sex are required.

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.

Useful For

Identifying a suspected imbalance in electrolytes or acid/base imbalance

Method Name

KS, NAS, CL: Potentiometric, Indirect Ion-Selective Electrode

HCO3: Photometric/Enzymatic

AGAP: Calculated Result

Reporting Name

Electrolyte Panel, S

Specimen Type


Specimen Minimum Volume

0.4 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
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: 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



<7 years: not established

≥7 years: 7-15

Day(s) Performed

Monday through Sunday

Report Available

Same day/1 to 2 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test has been cleared, approved, or is exempt by the US 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.

CPT Code Information

80051-Electrolyte Panel (if all 4 are performed)

82435-Chloride (if all 4 are not performed)

84295- Sodium (if all 4 are not performed)

84132-Potassium (if all 4 are not performed)

82374-Bicarbonate (if all 4 are not performed)

LOINC Code Information

Test ID Test Order Name Order LOINC Value
ELPSR Electrolyte Panel, S 24326-1


Result ID Test Result Name Result LOINC Value
NAS Sodium, S 2951-2
KS Potassium, S 2823-3
CL Chloride, S 2075-0
HCO3 Bicarbonate, S 1963-8
AGAP Anion Gap 33037-3


If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.