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Geisinger Medical Laboratories Test Catalog
CALCIUM, IONIZED |
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ORDERING INFORMATION: |
Geisinger Epic Procedure Code: LAB1924 Geisinger Epic ID: 14322 | |
SPECIMEN COLLECTION |
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Specimen type: |
Serum | |
Preferred collection container: |
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Specimen required: |
Capped, spun 3.5 mL gold-top serum separator tube; minimum 1 mL. | |
| SPECIMEN PROCESSING |
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Specimen processing instructions: |
Allow to clot. Centrifuge to separate serum within 3 hours of collection. Do not uncap or aliquot. | |
Transport temperature: |
Refrigerated. | |
Specimen stability: |
Unopened, centrifuged SST tube stable 3 days refrigerated. Unspun and unopened SST tube stable 3 hours at room temperature or refrigerated. | |
Rejection criteria: |
Stability limits exceeded. Specimens that have been opened. | |
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 | |
Critical values/courtesy alerts: |
Below 0.76 mmol/L; above 1.59 mmol/L. | |
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. | |
Methodology: |
Potentiometric |
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Synonyms: |
Free calcium, CAI, Ionized calcium Unbound 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