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Laboratory Test Directory

Chromosome Analysis, Cord Blood


Name Method Department Units
Cord Blood, Chromosome Analysis Chromosomal analysis

Specimen Requirements

Whole blood

Container Type Container Size Specimen Volume

Green tube (Sodium heparin), No Gel

6 mL 3 mL-6 mL

Room temperature - 24 hour(s)

Specimen Preparation

  • Do not centrifuge
  • Do not freeze
  • Keep at room temperature

Reasons for Rejection

  • Centrifuged specimen
  • Serum sample
  • Wrong collection tube
  • Frozen specimen
  • Clotted specimen


Please click on the Lab Form Link in the Forms Section to print and complete the Genetic Test Requisition Form. Completed Genetics Test Requisition required. Please collect umbilical cord blood specimen into a Sodium Heparin tube (dark green-top tube without gel separator). Do not use Lithium Heparin tube or other types of heparin tubes; please check tube for proper type of heparin. If STAT chromosome analysis is desired (done at extra charge), which provides faster result TAT, please indicate STAT on the requisition form (see test code STATPB). Chromosome analysis reflex to Microarray analysis is also available. If Microarray analysis is also desired, please submit additional cord blood sample (minimum 1 mL in EDTA). If patient has a family history of known chromosome abnormality, please provide the family member's chromosome result information (attach a copy of test result if available). If the proband was tested at Nationwide Childrens' Hospital Cytogenetics Laboratory, please provide the proband name, date of birth, and accession number (if available). If evaluation of extra cells (beyond the routine 20 cells) is desired to rule out low-level mosaicism, please request Mosaicism Study and 50 cells will be evaluated at extra charge.

CPT Code

  • 88230
  • 88262
  • 88289