Methodology
ACREA, CRETR: Colorimetric PHOSS: Photometric RTRP: Calculation
Synonyms
Tubular Reabsorption of Phosphorus, Random
Specimen Type
Serum and Urine
Performing Lab
Mayo Medical Lab
Epic ID
Other Reference Test
Lab Test Days
Monday-Sunday
Standard TAT
1 Day
Collection Information
Specimen Required
1ml Blood ***and*** 4ml Urine
Container Type
See Below
Collection Instructions
Patient must be fasting 12 hours (required). Serum must be drawn at time of urine collection. Collect serum in a (red-top) tube and collect random urine in a sterile leak-proof container.
Processing Information - Lab Use Only
Transport Temperature
Refrigerated (preferred)
Specimen Stability
Serum: Refrigerated (preferred): 7 Days; Frozen: 90 Days--- Urine: Refrigerated (preferred): 14 days; Ambient: 7 days; Frozen: 30 days
Rejection Criteria
Gross hemolysis
Test Volume Required
0.5 ml Serum ***and*** 4 ml Urine
Minimum Test Volume
0.5 ml Serum ***and*** 1ml Urine
Processing Instructions
Order test in Mayolink and send with Mayo courier Monday-Friday.
CPT Codes
82565, 82570, 84100, 84105
Revised
10/12/26
Initials
IM