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Specimen Collection Manual and Test Catalog

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CALCIUM

Geisinger Epic Procedure Code:  LAB1918    Geisinger Epic ID:  14318

SPECIMEN COLLECTION
Specimen type: 

Plasma or Serum


Preferred collection container: 
Specimen required: 

2 mL of serum or plasma; minimum 0.2 mL.



SPECIMEN PROCESSING
Processing instructions: 

Allow serum to clot. Centrifuge to separate serum or plasma within 2 hours of collection.


Transport temperature: 

Refrigerated (preferred). Room temperature or frozen specimen also acceptable.


Specimen stability: 

Room temperature: 7 days. Refrigerated: 3 weeks. Frozen: 8 months.


Rejection criteria: 

Stability limits exceeded.



TEST DETAILS
Reference interval: 

Less than 2 years: 9-11 mg/dL 
2 years to <12 yeas: 8.8-10.8 mg/dL 
12 years and above: 8.4-10.2 mg/dL 
 


Critical values/courtesy alerts: 
Below 6.0; above 13.0 mg/dL
CPT code(s):  82310
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.
The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.

Test includes: 

Calcium.


Methodology: 
Spectrophotometric (Colorimetric)
Synonyms: 

CA


Clinical significance: 

Serum calcium is involved in the regulation of neuromuscular and enzyme activity, bone metabolism, and blood coagulation. Calcium blood levels are controlled by a complex interaction of parathyroid hormone, vitamin D, calcitonin, and adrenal cortical steroids. Calcium measurements are useful in the diagnosis of parathyroid disease, some bone disorders, and chronic renal disease.


Doctoral Director(s): 
Hoi-Ying Elsie Yu, PhD, DABCC, FADLM
Sheng-Ying (Margaret) Lo, PhD, DABCC
Review Date:  12/27/2024

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