Ordering Recommendation

Use to assess donor genotype and compare to recipient genotype prior to allogeneic hematopoietic stem cell transplant. For additional donor(s) testing, refer to Chimerism, Additional Donor (3005468). Pretransplant genotyping is required to enable posttransplant chimerism and engraftment monitoring.

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation

Lavender (EDTA), pink (K2EDTA), or yellow (ACD solution A or B) OR bone marrow in lavender (EDTA) OR buccal brushes from donor.

Specimen Preparation

Transport 2 mL whole blood (Min: 1 mL) OR 1 mL bone marrow (Min: 1 mL) OR 2 buccal brushes in a sterile, dry tube. (Min: 2 brushes)

Storage/Transport Temperature

Refrigerated. Also acceptable: Ambient.

Unacceptable Conditions

Posttransplant results will be compared to pretransplant recipient and donor genotypes, therefore, donor and recipient samples must be obtained and genotyped before the transplant event occurs.


Room temperature: 1 week; Refrigerated: 1 month; Frozen: Unacceptable


Polymerase Chain Reaction (PCR)/Fragment Analysis




5-9 days
Expected TAT begins at receipt of corresponding Chimerism, Recipient, Pretransplant (3005449) specimen.

Reference Interval

Interpretive Data

Background Information: Chimerism, Donor
Indication: Monitoring for bone marrow transplant patients; interval between bone marrow transplantation and testing is necessary for proper interpretation of results.
Methodology: PCR followed by capillary electrophoresis. Specimens are analyzed using 15 autosomal markers (D8S1179, D21S11, D7S820, CSF1PO, D3S1358, THO1, D13S317, D16S539, D2S1338, D19S433, vWa, TPOX, D18S51, D5S818 and FGA) and one gender marker (amelogenin).
Limitations: Diagnostic errors can occur due to rare sequence variations.

Compliance Category

Laboratory Developed Test (LDT)


Hotline History


CPT Codes

See CPT codes under Chimerism, Recipient, Pretransplant (3005449)


Component Test Code* Component Chart Name LOINC
3005463 Chimerism Donor, Specimen
3005464 Chimerism Donor, Recipient Name
3005465 Chimerism Donor,InformativeLoci
3005466 Chimerism Donor, Interpretation
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.


  • Bone marrow DNA typing
  • Chimerism evaluation
  • Pre transplant evaluation
  • Transplant analysis
  • Transplant evaluation
Chimerism, Donor