LabCorp and its Specialty Testing Group, a fully integrated portfolio of specialty and esoteric testing laboratories.

Mutation-specific Sequencing, Whole Blood

CPT: 81403


  • Sequencing, Follow-up

Special Instructions

Indicate the specific gene and mutation to be analyzed on the test request form. Failure to indicate the gene and mutation will result in testing delays.

Expected Turnaround Time

13 - 21 days

Specimen Requirements


Whole blood


Whole blood: 10 mL whole blood or 20 mL if ordering multiple tests


Whole blood: Yellow-top (ACD-A) tube or lavender-top (EDTA) tube

Storage Instructions

Maintain specimen at room temperature.

Test Details


This test is available for family testing when a mutation has been specifically identified through universal carrier screening (Inheritest® Gene-specific Sequencing, NGS [451910]; Inheritest® Ashkenazi Jewish Carrier Screening Panel, NGS [451920]; Inheritest® Comprehensive Panel, NGS [451950]; or Inheritest® Society-guided Screening Panel, NGS [451960]; or VistaSeq® Hereditary Cancer Panel [481220] or VistaSeq® Hereditary Cancer Panel Without BRCA [481240]); or through GeneSeq: Cardio testing. (See links to tests in Related Information).


This analysis does not rule out the presence of disease-causing mutations in other regions of the gene(s) analyzed or in other genes, and it does not rule out the presence of large deletion or duplication mutations or complex rearrangements. False-positive results or false-negative results may occur for reasons that include: Genetic variants, technical handling, blood transfusions, bone marrow transplantation, mislabeling of samples or erroneous representation of family relationships.

This test was developed, and its performance characteristics determined, by Esoterix Genetic Laboratories LLC. It has not been cleared or approved by the US Food and Drug Administration (FDA).


DNA is isolated and specific gene regions amplified by the polymerase chain reaction (PCR). Targeted mutations are detected by direct DNA sequencing using capillary gel electrophoresis and fluorescence detection.

For Providers

Please login to order a test

Order a Test

© 2020 Laboratory Corporation of America® Holdings and Lexi-Comp Inc. All Rights Reserved.

CPT Statement/Profile Statement

The LOINC® codes are copyright © 1994-2020, 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