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Geisinger Medical Laboratories Test Catalog
PHOSPHORUS |
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ORDERING INFORMATION: |
Geisinger Epic Procedure Code: LAB2846 Geisinger Epic ID: 14398 | |
SPECIMEN COLLECTION |
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Specimen type: |
Plasma or serum | |
Preferred collection container: |
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Specimen required: |
2 mL of serum or plasma; minimum 0.2 mL. | |
| SPECIMEN PROCESSING |
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Specimen 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: |
Spun SST: Room temperature: 24 hours. Refrigerated: 4 days. Frozen: 1 year. Spun PST: 12 hours. | |
Rejection criteria: |
Stability limits exceeded. | |
TEST DETAILS |
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Reference interval: |
Less than 30 days: 3.9-7.7 mg/dL 30 days to 1 year: 3.5-6.6 mg/dL 1 to <4 years: 3.1-6.0 mg/dL 4 to <13 years: 3.0-5.7 mg/dL 13 years and older: 2.5-4.8 mg/dL |
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CPT code(s): |
84100 | |
| 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. | ||
Methodology: |
Spectrophotometric (Colorimetric) |
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Synonyms: |
Phosphate, Inorganic Phosphorus PO4, PHOS
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Clinical significance: |
An increased phosphorus with a decreased calcium suggests either hypoparathyroidism or renal disease. A decreased phosphorus and an increased calcium suggests hyperparathyroidism or sarcoidosis. Decreased phosphorus and calcium may indicate malabsorption, vitamin D deficiency and renal tubular acidosis. Increased phosphorus and calcium suggest milk-alkali syndrome or hypervitaminosis D. |
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Doctoral Director(s:) |
Hoi-Ying Elsie Yu, PhD, DABCC 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