Test Directory

Clear All
Test Code
CHADD
Test Name
Chimerism, Additional Donor
CPT Codes
81266
Expected Turnaround Time
5 - 9 days
Clinical Utility
Use to assess donor genotype and compare to recipient genotype prior to allogeneic hematopoietic stem cell transplant. Pretransplant genotyping is required to enable posttransplant chimerism and engraftment monitoring.
Specimen and Container Info

Specimen

Container

Volume

Whole Blood

Lavender Top EDTA Tube; OR Pale Yellow Top (ACD) Tube

2 mL

Bone Marrow

Lavender Top (EDTA) Tube

1 mL

Buccal Brushes

Sterile Dry Tube

2 Buccal Brushes
Collection Instructions

Whole Blood:

  1. Collect whole blood in lavender top (EDTA) tube or pale yellow top (ACD) tube via venipuncture
  2. Transport specimen in original collection container

Bone Marrow:

  1. Collect bone marrow in lavender top (EDTA) tube via bone marrow collection procedure
  2. Transport specimen in original collection container

Buccal Swab:

  1. Collect buccal brushes via buccal brush collection procedure. (Brushes not supplied by Referral Testing Department)
  2. Place buccal brush in sterile dry tube
Processing and Submission Instructions
**FOR STEM CELL TRANSPLANT ORDERS ONLY**
Transport Instructions

Transport to the laboratory refrigerated. 
Stability Requirements

Room Temperature

1 week

Refrigerated

1 month
Methodology
Polymerase Chain Reaction (PCR)/Fragment Analysis
Reference Lab
ARUP Laboratories
Testing Schedule
Routine, daily
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
© 2026 HNL Lab Medicine. All rights reserved.