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Comprehensive Metabolic Panel

Test Code


CPT Code(s)



Albumin, Albumin/Globulin Ratio (calculated), Alkaline Phosphatase, ALT, AST, BUN/Creatinine Ratio (calculated), Calcium, Carbon Dioxide, Chloride, Creatinine with GFR Estimated, Globulin (calculated), Glucose, Potassium, Sodium, Total Bilirubin, Total Protein, Urea Nitrogen

Patient Preparation

Fasting specimen is preferred

Preferred Specimen(s)

2 mL serum

Minimum Volume

1 mL

Alternative Specimen(s)

Spun SST® tube

Transport Container

Serum Separator Tube (SST®)

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 48 hours
Refrigerated: 72 hours
Frozen: Unacceptable

Reject Criteria

Moderate to gross hemolysis


See individual tests

Performing Laboratory

Quest Diagnostics - Southwest Region


eGFR is intended for patients with stable renal function.

Reference Range(s)

See Laboratory Report

Clinical Significance

See individual tests

Alternative Name(s)

CMP, Metabolic Panels

LOINC®' Code(s)

The Result and LOINC information listed below should not be used for electronic interface maintenance with Quest Diagnostics. Please contact the Quest Diagnostics Connectivity Help Desk for more information at 800-697-9302.

NOTE: The codes listed in the table below are not orderable Test Codes.

Result NameLOINC CodeComponent Name
25000100UREA NITROGEN (BUN)3094-0Urea nitrogen
25000210eGFR NON-AFR. AMERICAN33914-3Glomerular filtration rate/1.73 sq M.predicted
25000220eGFR AFRICAN AMERICAN48643-1Glomerular filtration rate/1.73 sq M.predicted.black
25000300BUN/CREATININE RATIO3097-3Urea nitrogen/Creatinine
25000700CARBON DIOXIDE2028-9Carbon dioxide
25001300PROTEIN, TOTAL2885-2Protein
25001600ALBUMIN/GLOBULIN RATIO1759-0Albumin/Globulin
25001700BILIRUBIN, TOTAL1975-2Bilirubin
25002000ALKALINE PHOSPHATASE6768-6Alkaline phosphatase
25002300AST1920-8Aspartate aminotransferase
25002400ALT1742-6Alanine aminotransferase
25016000LIPEMIA20394-3Sample lipemic
25016100ICTERUS20392-7Sample icteric
25016200HEMOLYSIS20393-5Sample hemolyzed

Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

The CPT codes provided 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 payer being billed.

LOINC assignment is based on a combination of test attributes, including the method used by the performing laboratory. For tests not performed by Quest Diagnostics, codes are assigned by the performing laboratory.

* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.