Test Overview

Test Usage

Detection of in utero chromosome abnormalities.

Reference Range*

Interpretive report provided.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details

Days Test Performed

Monday, Wednesday, Thursday, 8:00am - 4:00pm

Analytic Time

1 - 2 weeks

Soft Order Code


MiChart Code

Cytogenetics, Chromosome Analysis/Karyotype, Chorionic Villi



Karyotype, Chorionic Villus Sampling
Karyotype, CVS

+ See More



Looking to Order a Test?

We’ve provided helpful links to make ordering easy.

Find a Requisition

All specimens should be accompanied by a requisition.

Submitting Specimens

Learn about how to properly label and where to ship specimens.

Order Kits and Supplies

MLabs provides all the supplies necessary for the collection of specimens.

Test FAQ

Visit our provider FAQ and learn about common questions to ordering tests.

Specimen Requirements

Offsite Collection Instructions

Obtain 20 mg to 30 mg of chorionic villus specimen (CVS) by the transabdominal or transcervical method. Transfer the CVS to a Petri dish containing transport medium. Using a stereomicroscope and sterile forceps, assess the quality and quantity of the villi, and remove any blood clots and maternal decidua. Transfer the CVS by using sterile technique to one or two 15-mL centrifuge tube(s) with 15 mL of transport medium. Send specimen refrigerated. Specimen cannot be frozen.

Normal Volume

15-20 mg

Minimum Volume

5 mg

Additional Information

For University of Michigan registered patients, when chromosome analysis is requested to rule out certain conditions such as Turner syndrome (when indicated based on initial diagnosis) or suspected mosaicism, an additional cell count and/or special stains will be performed at an additional charge. By ordering this test the clinician acknowledges that additional reflex testing will be performed and billed at a separate additional charge if indicated.

Billing Information

Fee Codes

CPT Code

88267 Chromosome Analysis, 88235 Tissue Culture

Have More Billing Questions?

Explore our helpful billing resources:

Billing Resources

Billing FAQ