Glutaric Aciduria Type I

Glutaric aciduria type I (GA1) is a rare autosomal recessive disorder affecting the catabolism of the amino acids lysine, hydroxylysine and tryptophan. There is wide variation in disease severity, even reported among affected siblings. Some patients are asymptomatic even without treatment, whereas others have severe neurologic phenotype characterized by progressive dystonia, spasticity and opisthotonos. Macrocephaly is a common feature, and may be present at birth or develop in the first few weeks or months. Fronto-temporal atrophy may be apparent on neuroimaging and may preceed neurologic symptoms. Affected children are generally well at birth and may present with irritability, feeding difficulties repeated fevers, insomnia, or hypotonia

Tests Available

Forms and Documents

Test Details

  • Diagnostic confirmation
  • Carrier testing
  • Prenatal diagnosis in at risk pregnancies


4 weeks
2-5 mL Blood - Lavender Top Tube
Buccal Swabs

*Reporting times are typical, but could be extended in situations outside GeneDx's reasonable control.


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**The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.