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)
ARUP Consult®
Disease Topics
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: For human genetic inheritable conditions and mutations. This test was developed and its performance characteristics determined by ARUP Laboratories. The U. S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.

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.

Testing on a neonate, 7 days old or younger, will automatically order a preliminary chromosome analysis (intended to identify whole chromosome aneuploidies and large structural rearrangements). This will be reported under the same accession number as the final chromosome report, and is generally available in 2-3 days, if sample quantity and metaphase quality permits. Final results will be available within 5-7 days.

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