Chromosome Analysis, Prenatal Cordocentesis and Fetal Hemoglobin

CPT: Contact CPT coding department at 800-222-7566, ext 6-8400.
Print Share

Test Details


  • Karyotyping
  • Percutaneous Umbilical Cord Sampling (PUBS)


Rapid analysis of fetal chromosomes, used most frequently following the determination of fetal amniocyte mosaicism


Standard G-banded karyotyping and isoelectric focusing of hemoglobin to confirm fetal derivation of the sample

Specimen Requirements


Fetal blood


1 to 3 mL

Minimum Volume

0.5 mL


Green-top (sodium heparin) pediatric tube

Storage Instructions

Maintain specimen at room temperature.

Causes for Rejection

Specimen frozen; clotted specimen; specimen determined to be maternal in origin

Clinical Information

Special Instructions

Medical indication for procedure and the patient's name and age should be included on the request form.

For Providers

Please login to order a test.


© 2018  Laboratory Corporation of America® Holdings and Lexi-Comp Inc. All Rights Reserved.

CPT Statement/Profile Statement

The LOINC® codes are copyright © 1994-2018, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at Additional information regarding LOINC® codes can be found at, including the LOINC Manual, which can be downloaded at