Chromosome Analysis, Peripheral Blood, with Reflex to Genomic Microarray
Ordering Recommendation
Appropriate when there is a significant chance of trisomy. Chromosome studies will identify obvious numerical abnormalities, balanced chromosomal rearrangements, and large deletions/duplications. If chromosomes are normal, then testing reflexes to microarray.
Giemsa Band/Genomic Microarray (Oligo-SNP Array)
10-18 days
Results requiring the completion of microarray testing may exceed the standard TAT  
New York DOH Approval Status
Specimens from New York clients will be sent out to a New York DOH approved laboratory, if possible.
Time SensitiveTime Sensitive

Cytogenetic Test Request Form Recommended (ARUP form #43097)Cytogenetic Test Request Form Recommended (ARUP form #43097)

Specimen Required
Patient Preparation
Green (sodium heparin).  
Specimen Preparation
Do not freeze or expose to extreme temperatures. Transport 5 mL whole blood. (Min: 2 mL)  
Storage/Transport Temperature
Room temperature.  
Unacceptable Conditions
Frozen specimens. Clotted specimens.  
Ambient: 48 hours; Refrigerated: 48 hours; Frozen: Unacceptable  
Reference Interval
By report  
Interpretive Data
Refer to report.

Compliance Statement C: The performance characteristics of this test were validated by ARUP Laboratories. The U.S. Food and Drug Administration (FDA) has not approved or cleared this test; however, FDA approval or clearance is currently not required for clinical use of this test. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions. ARUP is authorized under Clinical Laboratory Improvement Amendments (CLIA) and by all states to perform high-complexity testing.

Counseling and informed consent are recommended for genetic testing. Consent forms are available online.
These studies involve culturing of living cells; therefore, turnaround times given represent average times which are subject to multiple variables. After specimen receipt, results are generally available in an average of 10 days with 7-10 additional days required for microarray.

A processing fee will be charged if the client cancels this procedure after the test has been set up

When the result of Chromosome Analysis is "normal," then Genomic Microarray testing will be added. Additional charges apply.

Specimen and completed test request form, including clinical indication, must be received within 48 hours of collection.

This test must be ordered using Cytogenetic test request form #43097 or through your ARUP interface. Please submit the Patient History for Cytogenetic (Chromosome) Studies form with the electronic packing list (available at
CPT Code(s)
88262, 88230, 88291; If reflexed, add 81229
Component Test Code*Component Chart NameLOINC
0097640Chromosome Analysis, Peripheral Blood29770-5
2006186EER Chrom Analysis PB w/Rflx to Array11526-1
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
  • aCGH
  • array
  • Array CGH
  • Array Comparative Genomic Hybridization
  • CGH
  • Chromosomal Microarray
  • CMA
  • Comparative Genomic Hybridization
  • Congenital Array
  • Constitutional Array
  • Microarray
  • Molecular Karyotype
  • Oligo Array
  • oligoarray
  • Oligonucleotide Array
  • Single-nucleotide-polymorphism (SNP) array
  • Targeted Array
  • Whole Genome Array