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HelpTest Code IFG23 Intact Fibroblast Growth Factor 23, Serum
Specimen Required
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 0.5 mL
Collection Instructions: Centrifuge and aliquot serum into plastic vial.
Useful For
Diagnosing and monitoring tumor induced osteomalacia
Diagnosing X-linked hypophosphatemia or autosomal dominant hypophosphatemic rickets
Diagnosing familial tumoral calcinosis with hyperphosphatemia
Reporting Name
Intact Fibroblast Growth Factor 23Specimen Type
SerumSpecimen Minimum Volume
0.25 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 14 days | |
| Frozen | 90 days |
Reject Due To
| Gross hemolysis | Reject |
| Gross lipemia | Reject |
| Gross icterus | OK |
Reference Values
Pediatric (<18 yrs): ≤52 pg/mL
Adults (≥18 yrs): ≤ 59 pg/mL
Day(s) Performed
Tuesday
Report Available
2 to 8 daysSpecimen Retention Time
2 weeksPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
83520
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| IFG23 | Intact Fibroblast Growth Factor 23 | 54390-0 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 607216 | Intact Fibroblast Growth Factor 23 | 54390-0 |
Forms
If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:
Renal Diagnostics Test Request (T830)
Oncology Test Request (T729)