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3016875
Twin Zygosity
TWINZYG
Ordering Recommendation
Use to determine zygosity.
New York DOH Approval Status
This test is New York state approved.
Specimen Required
Patient Preparation
Collect
From each twin: Lavender (EDTA), pink (K2EDTA), or yellow (ACD solution A or B).
Specimen Preparation
From each twin: Transport 2 mL whole blood (Min: 1 mL)
Storage/Transport Temperature
Refrigerated. Also acceptable: Ambient
Unacceptable Conditions
Remarks
Stability
Room temperature: 1 week; Refrigerated: 1 month; Frozen: Unacceptable
Methodology
Polymerase Chain Reaction (PCR)/Fragment Analysis
Performed
Varies
Reported
5-10 days
Reference Interval
By report.
Interpretive Data
Refer to report.
Compliance Category
Laboratory Developed Test (LDT)
Note
Results from both twins will be compared and reported; therefore, a test must be ordered for and sample submitted from each individual.
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
N/A
CPT Codes
81265
Components
| Component Test Code* | Component Chart Name | LOINC |
|---|---|---|
| 3016876 | Twin Zygosity Specimen | 31208-2 |
| 3016877 | Twin Zygosity Interpretation | 55198-6 |
* 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
- Fetal Zygosity
- Mono/Dizygotic Differentiation
- Newborn Zygosity
- Zygosity, Twin Pre/Postnatal
Twin Zygosity
