Posted Date
Effective Date
Update Type New Tests
CPT Code 83520
Order Code IFG23
Referral Laboratory Mayo Medical Laboratories



Intact Fibroblast Growth Factor 23

Soft code:                                IFG23

CPT Code:                               83520

Referral Laboratory:                Mayo Medical Laboratories


Effective March 1, 2021, MLabs will offer Intact Fibroblast Growth Factor 23 (IFG23) testing via Mayo medical Laboratories.


Collection Instructions: Collect 3 mL of whole blood in a serum separator tube (SST). Centrifuge and aliquot serum into a plastic vial. Ship the specimen refrigerated.  


Methodology:  Chemiluminescence Based Quantitative Sandwich Immunoassay


Test Analysis: Test performed on Wednesday, 1-9 days turnaround time


Reference Range:        


Pediatric (<18 yrs):  ≤52 pg/mL

Adults (≥18 yrs):  ≤59 pg/mL