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Laboratory Test Directory

Chromosome Analysis (High Resolution), Peripheral Blood


Name Method Department Units
Peripheral Blood, Chromosome Analysis Chromosomal analysis

Specimen Requirements

Whole blood

Container Type Container Size Specimen Volume

Green tube (Sodium heparin), No Gel

10 mL 5 mL-8 mL

Green tube (Sodium heparin), No Gel

10 mL 5 mL-8 mL

Green tube (Sodium heparin), No Gel

3 mL 1 mL-3 mL

Room temperature - 24 hour(s)

Specimen Preparation

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

Reasons for Rejection

  • Centrifuged specimen
  • Collected in tube with gel separator
  • 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 whole 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. For newborn patients, STAT blood chromosome analysis is available at extra charge (see test code STATPB), which provides faster result TAT. Chromosome analysis reflex to Microarray analysis is also available. 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.


Lab Form

CPT Code

  • 88230
  • 88262
  • 88289