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Electrolyte Panel

Test Code
LAB16


Alias/See Also
1231100212


CPT Codes
80051

Includes
SODIUM, BLOOD (NA)
POTASSIUM (K)
CHLORIDE, BLOOD (CL)
CARBON DIOXIDE (CO2)
ANION GAP


Preferred Specimen
Green Lithium Heparin (Gel separator preferred)


Minimum Volume
0.5 mL plasma


Other Acceptable Specimens
NA HEP Green top tubes (Contact Lab)


Instructions
Specimen must be centrifuged within 2 hours after collection and serum pulled off cells.


Specimen Stability
Room Temperature: centrifuge within 2 hours
Refrigerated: 7 days


Reference Range
SODIUM, BLOOD (NA)
Males/Females:
0-60 Days: 132-142 mEq/L
60 Days-15 Years: 138-145 mEq/L
15 Years and above: 136-145 mEq/L
POTASSIUM (K)
Males/Females:
0-7 Days: 3.6-6.0 mEq/L
7-180 Days: 3.7-5.9 mEq/L
180 Days-15 Years: 4.1-5.3 mEq/L
15-18 Years: 3.4-4.7 mEq/L
Adults: 3.5-5.1 mEq/L
CHLORIDE, BLOOD (CL)
Males/Females:
0-60 Days: 95-110 mEq/L
60 Days-15 Years: 98-108 mEq/L
15-18 Years: 98-106 mEq/L
Adults: 98-107 mEq/L
CARBON DIOXIDE (CO2)
Males/Females:
0-15 Years: 18.0-27.0 mEq/L
15-18 Years: 25.0-35.0 mEq/L
Adults: 22.0-29.0 mEq/L
ANION GAP
Males/Females:
8-12 mEq/L


Performing Laboratory
ARKADELPHIA LABORATORY CONWAY LABORATORY FORT SMITH LABORATORY HEBER SPRINGS LABORATORY LITTLE ROCK LABORATORY NORTH LITTLE ROCK LABORATORY STUTTGART LABORATORY VAN BUREN LABORATORY MALVERN LABORATORY EL DORADO LABORATORY MAGNOLIA LABORATORY DREW COUNTY LABORATORY


Last Updated: August 26, 2026


The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.