CPT Code(s): 81265, 81266
Ordering Recommendation: Provide evidence that twins are monozygotic versus dizygotic. This test may be used for legal purposes, obstetric management, as part of a transplant evaluation, and for other purposes.
Synonyms: Identical twins, fraternal twins, monozygotic twins, dizygotic twins, identity testing, zygosity studies
Methodology: PCR followed by capillary electrophoresis using 15 autosomal short tandem repeat (STR) markers and one gender marker (amelogenin).
Performed: Monday through Friday
Reported: 6-9 days