Fibroblast Growth Factor 23 Intact, Serum
| Abbrev Code: | MMMISC | ||
| Order Code: | LAB4909 | Order Name: | Laboratory Miscellaneous Order |
| Order Instructions: | Fibroblast Growth Factor 23 (FGFT23) Level is no longer available. Cancel and reorder as MMMISC. | ||
| Methodology: | Chemiluminescence-based quantitative sandwich immunoassay | ||
| CPT Codes: | 83520 x1 | ||
| Turnaround Time: | Specimens are sent to the reference laboratory Mon-Fri; results are reported within 3-9 days. | ||
| Compliance: | This test uses a reagent or kit labeled by the manufacturer as Research Use Only. Its performance characteristics were determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration. |
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Collection Instructions
| Specimen: | Blood |
| Optimal Volume: | 1 mL |
| Minimum\Peds Volume: | 0.7 mL |
| Container: | Red or gold (gel) |
Processing and Shipping
| Specimen Processing: | Centrifuge and aliquot 0.5 mL, 0.25 mL minimum. Store refrigerated. |
| Shipping Instructions: | Ship at refrigerated temperatures (preferred). |
| Stability: | 14 days refrigerated; 90 days frozen. |
| Test Performed at or Referral Lab | Lab Sendouts (Mayo) |
| Referral Lab number: | IFG23 |
Interpretive
| Reference Range: | Pediatric (<18 years): ≤ 52 pg/mL
Adults (≥ 18 years): ≤ 59 pg/mL |
| Use: | Diagnosing and monitoring oncogenic osteomalacia; diagnosing x-linked hypophosphatemia or autosomal dominant hypophosphatemic rickets; predicting treatment response to calcitriol or vitamin D analogs in patients with renal failure. |
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