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Non-Invasive Prenatal Testing for RhD Genotyping, Fetal
2009077
Ordering Recommendation

Determines fetal RHD genotype to assess risk for alloimmune hemolytic disease of the newborn. RHD genotyping is appropriate only when the mother is Rh-negative and the father is heterozygous for RHD or is unavailable for testing. Useful after 10 weeks of gestation.

Mnemonic
NIPT RHD
Methodology
Mass Spectrometry
Performed
Varies
Reported
7-14 days
New York DOH Approval Status
Specimens from New York clients will be sent out to a New York DOH approved laboratory, if possible.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
 
Collect
Whole blood in two cell-free DNA BCT tubes (ARUP Supply #52543) available online through eSupply using ARUP Connect™ or contact ARUP Client Services at (800) 522-2787. 
Specimen Preparation
Transport 20 mL maternal whole blood. (Min: 16 mL) 
Storage/Transport Temperature
Room temperature. Also acceptable: Refrigerated. 
Unacceptable Conditions
Multiple fetuses. 
Remarks
Mother must have Rh-negative blood type and be greater than 10 weeks gestation. Gestational age at time of collection is required for testing. 
Stability
Ambient: 1 week; Refrigerated: 1 week; Frozen: Unacceptable 
Reference Interval
By report
Interpretive Data


Note
CPT Code(s)
81403 (SRY); 81479
Components
Component Test Code*Component Chart NameLOINC
2009078RhD Genotyping, Fetal
* 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.
Aliases

Performed at Sequenom