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Lab Test Dictionary

Phenylbutyrate Metabolite Analysis

Specimen Type

Urine, Random

Performing Lab

Quest forwards to Baylor (TSO)

Epic ID

Other Reference Test

Standard TAT

8 Days

Collection Information

Specimen Required

2-4 mL Random Urine

Container Type

Sterile Container

Collection Instructions

No preservative.

Processing Information - Lab Use Only

Transport Temperature


Specimen Stability

Room Temp=Unacceptable; Refrigerated=48 Hours; Frozen=5 Months

Test Volume Required

4 mL Random Urine

Minimum Test Volume

2 mL Random Urine

Processing Instructions

Requires TSO form.


Baylor test code: 4651. Requires TSO form.

CPT Codes

83789, 82543 (x3), 82570