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Laboratory Test Directory

STAT Chromosome Analysis (High Resolution), Peripheral Blood


Name Method Department Units
STAT Peripheral Blood, Chromosome Analysis Chromosomal analysis

Specimen Requirements

Whole blood

Container Type Container Size Specimen Volume

Green tube (Sodium heparin), No Gel

3 mL 1 mL-3 mL

Room temperature - 24 hour(s)

Specimen Preparation

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

Reasons for Rejection

  • Centrifuged specimen
  • Collected in tube with gel separator
  • Wrong collection tube
  • Frozen whole blood


Please click on the Lab Form Link in the Forms Section to print and complete the Genetic Test Requisition Form. Submission of a completed Genetic Test Requisition Form is required. Peripheral blood and cord blood samples are accepted for this testing. Please collect blood specimen in a Sodium Heparin tube (dark green-top tube without gel separator). DO NOT use Lithium Heparin tube or other types of Heparin tubes. Please clearly indicate "STAT" on the lab order.

This test evaluates chromosomes in 20 cells (cultured lymphocytes) from blood sample. This test is used to diagnose or rule out numerical and structural chromosomal abnormalities such as aneuploidy, chromosome translocation, and chromosome inversion. This test is useful for newborn patients who are suspected of having numerical chromosome abnormalities, such as trisomy 21, trisomy 13, trisomy 18, and Turner syndrome.

STAT chromosome analysis can provide a verbal preliminary chromosome result (non-high resolution) in 2 business days (within 72 hours) from the time the sample is received by the laboratory. Final written report including high resolution chromosome analysis is typically available in 7 days. If STAT result call-out for Saturday or Sunday is desired, the ordering provider MUST call the laboratory at the time of speicmen submission to request the weekend result call-out and provide the telephone or pager number to be called.

If evaluation of extra cells (beyond the routine 20 cells) is desired to rule out low-level mosaicism, please request "Mosaicism Study" on the lab order and 50 cells will be evaluated at extra charge.

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 Children's Hospital Cytogenetics Laboratory, please provide the proband name, date of birth, and accession number (if available).


Lab Form

CPT Code

  • 88230
  • 88262
  • 88289