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Cytogenetics Blood Chromosome Analysis

CPT: 88230; 88262


Karyotype; Routine G-Banding;

Expected Turnaround Time

7 - 14 days Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.

Specimen Requirements


Whole blood


5-10 mL (adult); 2-5 mL (child - less for newborn)


Green-top (sodium heparin) tube


High concentrations of heparin are toxic. Do not collect small volumes in large vacutainers or add additional heparin to specimens.

Storage Instructions

Maintain specimen at room temperature. Do not freeze.

Causes for Rejection

Hemolysis; specimen clotted; use of improper anticoagulant; frozen specimen

Test Details


Evaluate congenital malformations, intellectual disability, growth restriction, infertility, cryptorchidism, hypogonadism, amenorrhea (primary), abnormal/ambiguous genitalia, recurrent miscarriage, Turner syndrome, Klinefelter syndrome, Down syndrome, or other suspected chromosomal disorders.

Pregnancy Week

14-21 Weeks
22+ Weeks