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Geisinger Medical Laboratories Test Catalog
CALCIUM, IONIZED, WHOLE BLOOD |
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Geisinger Epic Procedure Code: LAB1925
Geisinger Epic ID: 14323
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SPECIMEN COLLECTION |
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Specimen type: |
Whole blood | |
Preferred collection container: |
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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. | |
| SPECIMEN PROCESSING |
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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. | |
TEST DETAILS |
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Reference interval: |
0-17 years: 1.22-1.37 mmol/L 18 years and older: 1.13-1.32 mmol/L |
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Critical values/courtesy alerts: |
Below 0.76 mmol/L; above 1.59 mmol/L. | |
Additional information: |
None. | |
CPT code(s): |
82330 | |
| 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. | |
Methodology: |
Potentiometric |
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Synonyms: |
Unbound calcium, CAIWB Free calcium
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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, FADLM Sheng-Ying (Margaret) Lo, PhD, DABCC |
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| Review Date: | 12/14/2022 | |
Performing Locations
Geisinger Wyoming Valley Medical Center
Geisinger Shamokin Area Community Hospital
Geisinger Community Medical Center
Geisinger Medical Center Muncy