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Geisinger Medical Laboratories/Geisinger Proven Diagnostics Test Catalog
CALCIUM, 24 HOUR URINE |
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ORDERING INFORMATION: |
Geisinger Epic Procedure Code: LAB1923 Geisinger Epic ID: 6514 | |
SPECIMEN COLLECTION |
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Specimen type: |
24-hour urine | |
Preferred collection container: |
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Specimen required: |
5 mL aliquot of urine; minimum 1 mL. | |
Special notes: |
Specimen may be collected without acid. Estimate total collection volume from 24-hour urine container. Add 30 mL 6N HCl to the 24-hour collection container and mix well prior to removing aliquot. Record total volume on both aliquot tube and request slip (if applicable). | |
| SPECIMEN PROCESSING |
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Specimen processing instructions: |
If an aliquot is received without the added acid, follow the processing step for Calcium, random urine. | |
Transport temperature: |
Refrigerated (preferred). Room temperature or frozen specimen also acceptable. | |
Specimen stability: |
Room temperature: 2 days. Refrigerated: 4 days. Frozen: 3 weeks. | |
Rejection criteria: |
Stability limits exceeded. | |
TEST DETAILS |
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Reference interval: |
Urine calcium: 0.05-0.30 gm/24 hours. | |
CPT code(s): |
82340 | |
| 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 - 24-hour urine, 24-hour total volume. | |
Methodology: |
Spectrophotometric (Colorimetric) |
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Synonyms: |
CA24
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Clinical significance: |
Urinary calcium reflects dietary intake, rate of calcium absorption by the intestine, and bone resorption. Urinary calcium is used primarily to evaluate parathyroid function and the effects of vitamin D. | |
Doctoral Director(s:) |
Hoi-Ying Elsie Yu, PhD, DABCC Sheng-Ying (Margaret) Lo, PhD, DABCC |
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| Review Date: | 12/14/2022 | |