Genetic Testing Company | The DNA Diagnostic Experts | GeneDx

In observance of Independence Day, GeneDx will be closed on Friday, July 3rd, and Saturday, July 4th. Nevertheless, all specimens arriving on Friday, July 3rd will be accepted, accessioned and processed. We will not accept specimens on Saturday, July 4th. We will resume our normal Monday through Saturday schedule on Monday, July 6, 2015. Please also note that FedEx works on a modified schedule on Friday, July 3rd and FedEx and UPS are closed on Saturday, July 4th. If you have any questions or inquiries, please call us at 301-519-2100 or email us at

FZD4 Gene Sequencing



Clinical Utility:
  • Confirmation of a clinical diagnosis
  • Development of an appropriate management plan
  • Differential diagnosis includes retinopathy of prematurity (ROP), Coats disease, persistent fetal vasculature syndrome, Norrie’s disease, and idiopathic retinal detachment.
  • Prenatal diagnosis in families, in which the pathogenic mutation(s) have been identified
Lab Method:
Capillary Sequencing


Test Code:
Turnaround Time:
5-6 weeks
Preferred Specimen:
2-5 mL Blood - Lavender Top Tube
Alternative Specimen:
Oral Rinse (30-40 mL), Dried Blood Spots


CPT Codes:
New York Approved:
ABN Required:
Billing Information:
View Billing Policy
ICD Codes:
  • 362.16: Retinal neovascularization NOS, Neovascularization: choroidal subretinal
  • 362.12: Exudative retinopathy Coats' syndrome
  • 362.13: Changes in vascular appearance, Vascular sheathing of retina
* For price inquiries please email


  1. Chung et al., (2008) Hum Mutat 30:4, 641-648
  2. Dickinson J et al., (2006) Clin and Exp Ophthalmol 34:682-688
  3. Kondo H et al., (2007) IOVS 48:1276-1282
  4. Qin M et al., (2005) Hum Mutat; 26(2):104-12
  5. Riveiro-Alvarez R et al., (2005) Molec Vis 11:705-712
  6. Jiao X (2004) Hum. Genet. 75:878–884
  7. Nallathambi J et al., (2006) Mol Vis; 12: 1086–92
  8. Toomes C et al., (2004) Am J Hum Genet; 74: 721–30
  9. Kondo H (2003) Br J Ophthalmol; 87:1291–1295

Back To Top