Genomics Testing Laboratory

Red Cell Genotyping Ordering Information

Testing is requested via a Genomics Request for Testing (RFT) Laboratory Form.  Form must be fully completed to avoid delay in testing.

Bloodworks Northwest can no longer offer to bill to patients directly or to the patient’s insurance.  For questions, contact the lab manager or supervisor.

Refer to the Table below when making a blood group selection.

Blood Groups Test Selection

Blood Group System Allele(s)
Rhesus Presence of D gene (exon 7; intron4)
Weak D, Partial D
D pseudogene (D negative)
E; e
C; c
D zygosity*
Kell K1 (K); K2 (k); Jsa; Jsb
Duffy Fya; Fyb; GATA box mutation
Kidd Jka; Jkb
MNS M; N; S; s; glycophorin B (GPB expression)
Dombrock Doa; Dob; rare – Hy; Gy; Jo
Red Cell Genotyping for Multiple Blood Groups C/c; E/e; K/k; Jsa/Jsb; Kpa/Kpb; Fya/ Fyb(silencing mutation); Fyx; Jka/Jkb; MN; S/s (silencing S); Lua/Lub; Doa/Dob; Hy+/Hy-; Joa+/Joa-; LWa/LWb; Dia/Dib; Coa/Cob; Sc1/Sc2

Sample Requirements

  • Minimum of 3cc whole blood drawn in EDTA (lavender top tubes).
  • Fetal cell genotyping:
    • Requires cultured amniocytes in two T-25 flasks grown to confluency. (amniotic fluid not acceptable).
    • For shipping, the cultured cells should have media added to the flasks and sealed to avoid leakage.
    • We do not provide laboratory services to culture the amniocytes.
  • All samples must include a completed Request for Testing form (RFT) please see under Quick Links for appropriate form.
  • All samples should arrive for testing at the lab within 96 hours.
  • Whole blood or cultured amniocytes are shipped at room temperature according to federal shipping guidelines.
  • Cultured amniocytes arriving after 1pm on Friday are not acceptable.

Labeling Samples
All samples must be properly labeled and information must agree with the identification on the RFT:

  • If a sample is identified by name, there must also be a numeric identifier which may include Hospital number, SS#, or other coded identifier.
  • A draw date needs to be on the sample and also the RFT.

Submission and Transporting
Send the sample together with the completed RFT to:

Bloodworks Northwest
Genomics Testing Laboratory
921 Terry Ave
Seattle, WA 98104

Samples must be sent in a sealed, leak-proof container marked with a biohazard sticker to comply with OSHA safety standards. Samples should be shipped at ambient temperature.

Turn Around Time

  • Many test results can be reported within 72 hours of receipt of the sample.
  • RhD zygosity testing and hemophilia mutations may take up to two weeks.
  • Reports are faxed to the institution. Fax number must be provided.

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