Geisinger Medical Laboratories/Geisinger Proven Diagnostics Test Catalog

Test Name: Sunquest Test Code Epic Procedure Code Or ID CPT Code:  


Sunquest Test Code:
CAIWB      Geisinger Epic Procedure Code: 82330.01         Geisinger Epic ID: 14323

Specimen type:
Whole blood
Preferred collection container:
Specimen required:
1 mL whole blood; minimum 0.4 mL.
Special notes:
Due to sample instability, this test may only be collected and analyzed at a performing laboratory site (see below). Expel excess air from syringe. Mix well immediately after collection.

Transport temperature:
Room temperature (preferred). Transport immediately. If delay in transport is anticipated, place specimen in an ice slurry.
Specimen stability:
Stable 3 hours at room temperature or refrigerated.
Rejection criteria:
Stability limits exceeded or clotted specimen.

Reference interval:
0-17 years: 1.22-1.37 mmol/L
18 years and older: 1.13-1.32 mmol/L
Critical values/courtesy alerts:
Below 0.76 mmol/L; above 1.59 mmol/L.
Additional information:
CPT code(s):
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:
Ionized calcium in whole blood.
Unbound calcium
Free calcium
Clinical significance:
Ionized calcium represents the true "bioavailable" calcium in the circulation. It is measured with an ion-selective electrode (ISE) and corrected to a pH of 7.0. Ionized calcium is frequently measured with parathyroid hormone (PTH) to assess hyperparathyroidism.
Doctoral Director(s:)
Hoi-Ying Elsie Yu PhD, DABCC    
Review Date: 11/13/2018

Performing Locations

Geisinger Medical Center

Performing laboratory: Stat Lab
Technical Lead: Karen Delp
Frequency: Daily, Monday-Sunday
Performed stat? Yes

Geisinger Wyoming Valley Medical Center

Performing laboratory: ATL+
Technical Lead: Sarah McGowan    
Frequency: Daily, all shifts    
Performed stat? Yes

Geisinger Bloomsburg Hospital

Performing laboratory: Chemistry
Technical Lead: Robyn Stokes  
Frequency: Daily    
Performed stat? Yes

Geisinger Community Medical Center

Performing laboratory: Chemistry
Technical Lead: Ann Mack, Deborah Dempsey  
Frequency: Daily    
Performed stat? Yes

Geisinger Lewistown Hospital

Performing laboratory: Chemistry
Technical Lead: Melissa Forsythe  
Frequency: All shifts    
Performed stat? Yes

Geisinger Holy Spirit Hospital

Performing laboratory: ATL+
Technical specialist: Hadeel Naghnaghieh    
Frequency: Daily, all shifts    
Performed stat? Yes

Geisinger South Wilkes-Barre

Technical specialist: Bernadette Johnson    
Frequency: Daily, all shifts    
Performed stat? Yes
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*GMC - Geisinger Medical Center; GWV - Geisinger Wyoming Valley Medical Center; GSACH - Geisinger Shamokin Area Community Hospital; GBH - Geisinger Bloomsburg Hospital;
GCMC - Geisinger Community Medical Center (Scranton); GLH - Geisinger Lewistown Hospital; GHS - Geisinger Holy Spirit; GJSH - Geisinger Jersey Shore Hospital,
GSWB - Geisinger South Wilkes-Barre