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Lab Test Dictionary

T-Cell Receptor (TCR) Beta Gene Rearrangement, PCR (91446)


Polymerase Chain Reaction (PCR), Fragment Analysis


T-Cell Receptor (TCR) Clonality; TCR-Gamma Clonality

Specimen Type

Whole Blood or Bone Marrow

Performing Lab

Quest Diagnostics San Juan Capistrano

Epic ID


Lab Test Days

Monday and Wednesday

Standard TAT

7 Days

Collection Information

Specimen Required

3-5 mL Whole Blood or 0.5-1 mL Bone Marrow Aspirate

Container Type

Lavender (EDTA)

Collection Instructions

Bone marrow collected in sodium heparin (green-top) tube is also acceptable. Formalin-fixed, paraffin embedded tissue, tissue in sterile transport tube or Fine needle aspirates (FNA) are also acceptable.

Processing Information - Lab Use Only

Transport Temperature


Specimen Stability

Room Temp: 7 Days; Refrigerated: 7 Days Frozen: Unacceptable

Test Volume Required

5 mL Whole Blood or 1 mL Bone Marrow Aspirate

Minimum Test Volume

3 mL Whole Blood or 0.5mL Bone Marrow Aspirate

Processing Instructions

Indicate source in comments, on specimen and on batch sheet.


Insurance authorization is required prior to draw for outpatients. Ok to send on inpatients.

CPT Codes

81340 and HCPCS G0452