Genetic Testing Company | The DNA Diagnostic Experts | GeneDx

In observance of the holidays, GeneDx will be closed for business on Thursday, December 25, 2014 and on Thursday, January 1, 2015. We will be unable to receive and process specimens. FedEx and UPS will also not be in operation. Except for the aforementioned dates, GeneDx will operate on our normal schedule (Monday-Saturday), including December 24th and December 31st.  If you have any questions or inquiries, please call us at 301-519-2100 or email us at

HAX1 Gene Sequencing



Clinical Utility:
  • Confirmation of a clinical diagnosis
  • Prenatal diagnosis
Lab Method:
Capillary Sequencing


Test Code:
Turnaround Time:
4-5 weeks
Preferred Specimen:
2-5 mL Blood - Lavender Top Tube


CPT Codes:
New York Approved:
ABN Required:
Billing Information:
View Billing Policy
ICD Codes:
  • 288: Neutropenia Decreased, Absolute Neutrophil Count (ANC); Use additional code for any associated: fever (780.61), mucositis (478.11, 528.00-528.09, 538, 616.81) (776.7)
* For price inquiries please email


  1. Smith BN, et al, Homozygous HAX1 mutations in severe congenital neutropenia patients with sporadic disease: a novel mutation in two unrelated British kindreds. Br J Haematol 144:762, 2009
  2. Carlsson G, et al, Central nervous system involvement in severe congenital neutropenia: neurological and neuropsychological abnormalities associated with specific HAX1mutations, J Int Med 264:388, 2008
  3. Germeshausen M, et al. Novel HAX1 mutations in patients with severe congenital neutropenia reveal isoform-dependent genotype-phenotype correlations, Blood 111:4954, 2008
  4. Matsubara K, et. al, Severe developmental delay and epilepsy in a Japanese patient with severe congenital neutropenia due to HAX1 deficiency, Haematologica 92(12):e123-5, 2007
  5. Klein C., et al, HAX1 deficiency causes autosomal recessive severe congenital neutropenia (Kostmann disease), Nature Genetics 39:86-90, 2007
  6. Kostmann, R. Infantile genetic agranulocytosis (Agranulocytosis infantilis hereditaria): a new recessive lethal disease in man, Acta Paediatr. 45 (suppl) 1-78. 1956

Back To Top