3016676
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Kell K/k (KEL) Antigen Genotyping, Fetal

KELGENO FE
Example Reports
KK
Little k

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Informed Consent for Genetic Testing (Required for NY Patients)

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Additional Technical Information

Ordering Recommendation

Fetal Kell (K/k) genotyping to assess risk for alloimmune hemolytic disease. For parental or neonatal testing, refer to Kell K/k (KEL) Antigen Genotyping (3002001).

Maternal cell contamination (MCC) analysis is required and performed at no additional charge. Order Maternal Cell Contamination, Maternal Specimen (0050608) on a maternal blood specimen.

For guidance on ordering maternal cell contamination studies, please refer to Maternal Cell Contamination (MCC) Analysis Guide.  

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation
Collect

Fetal Specimen: Amniotic fluid OR cultured amniocytes OR cultured chorionic villus sampling (CVS).
Maternal Specimen: Refer to Maternal Cell Contamination, Maternal Specimen (0050608) for maternal specimen requirements.

Specimen Preparation

Transport: 10 mL amniotic fluid (min: 5 mL) OR
Two T-25 flasks of 80% confluent cultured amniocytes OR
Two T-25 flasks of 80% confluent cultured chorionic villus sampling (CVS). If submitting uncultured (direct) amniotic fluid or (direct) CVS and testing is desired on a cultured specimen, add Cell Culture for Genetic Testing (3020627). If transporting flasks, the client is responsible for maintaining backup cultures at the client institution. If ARUP receives cultured fetal cells below minimum confluence, Cell Culture for Genetic Testing (3020627) will be added by ARUP.

Storage/Transport Temperature

Preferred transport: Room temperature.
Preferred shipment: Within two days of collection or confluence.

Unacceptable Conditions

Frozen specimens.

Remarks

Counseling and informed consent are recommended for genetic testing. Consent forms are linked above.
New York Clients: informed consent is required with submission.

Stability

Room temperature: 2 days; Refrigerated: 2 days; Frozen: Unacceptable

Methodology

Polymerase Chain Reaction (PCR) / Fluorescence Monitoring / Fragment Analysis

Performed

Varies

Reported

3-10 days
If culture is required, an additional 1 to 2 weeks is required for processing time.

Reference Interval

Refer to report

Interpretive Data

Refer to report.

Compliance Category

Modified FDA

Note

Hotline History

View Hotline History

 

Hotline History

Date of Change
Test Name Change
Methodology
Performance/Reported Schedule
Specimen Requirements
Reference Interval
Interpretive Data
Note
CPT Code
Component Change
Other Interface Change
New Test
Inactive
07/20/2026
X
01/21/2025
X
N/A

CPT Codes

0001U; 81265 Fetal Cell Contamination (FCC)

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Components

Component Test Code* Component Chart Name LOINC
0050548 Maternal Contamination Study Fetal Spec 59266-7
0050612 Maternal Contam Study, Maternal Spec 66746-9
3016677 KEL Genotype, Fetal Specimen
3016678 KEL Genotype Fetal, 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.

Aliases

  • KEL1 and KEL2 genotyping
  • Kel1 heterozygosity or homozygosity assay
  • Kell Antigen genotyping
  • Kell/Cellano genotyping
Kell K/k (KEL) Antigen Genotyping, Fetal