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Test Code F13NG F13A1 and F13B Genes, Next-Generation Sequencing, Varies

Ordering Guidance

Genetic testing should only be considered if reduced factor XIII activity is documented and acquired cases of low factor XIII are excluded.

Shipping Instructions

Ambient and refrigerated specimens must arrive within 7 days of collection, and frozen specimens must arrive within 14 days.


Collect and package specimen as close to shipping time as possible.

Necessary Information

Rare Coagulation Disorder Patient Information is required. Testing may proceed without the patient information, however, the information aids in providing a more thorough interpretation. Ordering providers are strongly encouraged to fill out the form and send with the specimen.

Specimen Required

Submit only 1 of the following specimens:


Specimen Type: Whole blood


Preferred: Lavender top (EDTA)

Acceptable: Yellow top (ACD) or light-blue top (3.2% sodium citrate)

Specimen Volume: 3 mL

Collection Instructions:

1. Invert several times to mix blood.

2. Send whole blood specimen in original tube. Do not aliquot.

Specimen Stability: Ambient (preferred)/Refrigerated/Frozen


Specimen Type: Extracted DNA

Container/Tube: 1.5- to 2-mL tube

Specimen Volume: Entire specimen

Collection Instructions:

1. Label specimen as extracted DNA and source of specimen.

2. Provide volume and concentration of the DNA.

Specimen Stability: Frozen (preferred)/Refrigerated/Ambient


1. Rare Coagulation Disorder Patient Information (T824) is required.

2. New York Clients-Informed consent is required. Document on the request form or electronic order that a copy is on file. The following documents are available:

-Informed Consent for Genetic Testing (T576)

-Informed Consent for Genetic Testing-Spanish (T826)

3. If not ordering electronically, complete, print, and send a Coagulation Test Request (T753) with the specimen.

Useful For

Detecting the pathogenic alterations within the F13A1 and F13B genes to delineate the underlying molecular defect in a patient with a laboratory diagnosis of factor XIII deficiency


Genetic confirmation of hereditary factor XIII deficiency with the identification of an alteration in either the F13A1 or F13B gene known or suspected to cause the condition


Testing for close family members of an individual with a factor XIII deficiency diagnosis


This test is not intended for prenatal diagnosis

Testing Algorithm

A standard testing algorithm for factor XIII deficiency (FXIIID) has been developed by the Scientific and Standardization Committee of the International Society for Thrombosis and Haemostasis (ISTH).(1)


Genetic testing for FXIIID is indicated if:

-Factor XIII activity (FXIII) is reduced on a qualitative functional FXIII activity test

-Acquired causes of factor XIII deficiency have been excluded

Method Name

Custom Sequence Capture and Targeted Next-Generation Sequencing (NGS) Followed by Polymerase Chain Reaction (PCR) and Sanger Sequencing when appropriate

Reporting Name

F13A1 and B Genes, Full Gene NGS

Specimen Type


Specimen Minimum Volume

Blood: 1 mL
Extracted DNA: 100 mcL at 50 ng/mcL concentration

Specimen Stability Information

Specimen Type Temperature Time Special Container
Varies Ambient (preferred) 7 days
  Frozen  14 days
  Refrigerated  7 days

Reject Due To

Gross hemolysis OK
Gross lipemia OK

Reference Values

An interpretive report will be provided

Day(s) Performed


Report Available

21 to 28 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test was developed, and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
F13NG F13A1 and B Genes, Full Gene NGS 92991-9


Result ID Test Result Name Result LOINC Value
113076 F13NG Result 50397-9
113070 Alterations Detected 82939-0
113069 Interpretation 69047-9
113071 Additional Information 48767-8
113072 Method 85069-3
113073 Disclaimer 62364-5
113074 Panel Gene List 48018-6
113075 Reviewed By 18771-6