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Lab Test Dictionary

Bioavailable Vitamin D (25 Hydroxy)


Free Vitamin D 25 Hydroxy

Specimen Type

Serum or Plasma

Performing Lab

Quest forwards to Pan Laboratories (TSO)

Epic ID

Other Reference Test

Lab Test Days


Standard TAT

2 Day

Collection Information

Specimen Required

1-2 mL Blood

Container Type

Red Top (No Additive)

Collection Instructions

Plasma collected in an EDTA (lavender-top) tube is also acceptable.

Processing Information - Lab Use Only

Transport Temperature


Specimen Stability

Room Temp=Unacceptable; Refrigerated=7 Days; Frozen=2 Years

Test Volume Required

0.6 mL Serum or Plasma

Minimum Test Volume

0.3 mL Serum or Plasma

Processing Instructions

Requires TSO form.


Requires TSO form.

CPT Codes

83520 (x2)