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Test Code 2616 Calcium, Total, Plasma

Performing Laboratory

Barnes-Jewish Hospital Laboratory


Colorimetric (NM-BAPTA)

Literature Reference:

Package insert: Calcium reagent CA2. Roche Corporation, 02/2014.

Specimen Requirements

Note: This test is also available as part of #1851 Basic Metabolic Panel (BMP),  #6961 Comprehensive Metabolic Panel (CMP), and #6970 Renal Function Panel. See Common Panel Test Combinations in Special Instructions to avoid duplicate test requests when multiple panels are ordered.


Patient Preparation:

Fasting specimen is preferred but not required.


Specimen Type: Plasma

Container/Tube: Mint-green top (lithium heparin)

Specimen Volume: Full tube


Collection Instructions: Avoid prolonged venous stasis when drawing specimen.

Day(s) Test Set Up

Monday through Sunday

Turnaround Time:
STAT: 1 hour after receipt in laboratory 
Routine: 2 to 4 hours after receipt in laboratory

Reference Values

<1 year: 8.6-11.0 mg/dL
1-2 years: 8.6-10.7 mg/dL

>2 years: 8.5-10.3 mg/dL

Critical result (automatic call-back): ≤6.5 mg/dL or ≥14.0 mg/dL

Literature References:

1. Tietz, Burtis CA, Ashwood ER, Bruns DE eds: Textbook of Clinical Chemistry and Molecular Diagnostics 5th ed: Chapter 52, p. 1733, Elsevier, St. Louis, MO 2012.

2. Ladenson JH, McDonald JM (Eds). Multiple Myeloma and Hypercalcemia (Washington University case conference). Clin Chem 25:1821-1825, 1979.

3. Kang PK, Scott MG, Joe B, Narra V, Heiken J, Parvin CA.  Model for Predicting the Impact of Gadolinium on Plasma Calcium Measured by the o-Cresolphthalein Method.  Clinical Chemistry 2004; 741-746.

Test Classification and CPT Coding


Additional Information

For BJH Laboratory Use Only
Alternate Tube:

1 dark green-top (lithium heparin) tube
1 red-top tube
Analyte Stability:

See Analyte Stability Chart in Special Instructions.

Laboratory Processing Instructions:

Test performed in BJH Core Lab.  Processed by automated line for delivery to the Cobas 8000. Test performed in North Campus Laboratory. Centrifuge upon receipt and deliver to the Modular.Completed specimens are stored refrigerated for 5 days. 

Specimen Transport Temperature


LOINC Code Information

Name LOINC Code
Calcium, Total 17861-6