Newborn Screening - GAMT and ARG1-D

Newborn Screening is a Washington State Department of Health (Department) program that tests all babies born in Washington for rare but treatable disorders using a dried blood spot specimen. The Washington State Board of Health (Board) has the authority under RCW 70.83.050 to define and adopt rules for newborn screening in Washington.

Chapter 246-650 WAC specifies the conditions all newborns must be tested for in Washington. The Board filed a CR-101, Preproposal Statement of Inquiry, on November 28, 2023, for chapter 246-650 WAC. The CR-101 announces to the public that the Board is considering adding Guanidinoacetate methyltransferase (GAMT) deficiency and Arginase 1 deficiency (ARG1-D) to the list of mandatory conditions for newborn screening conducted by the Department.

To receive updated information about this rulemaking project, please subscribe to the Newborn Screening email list.  

Statutory Authority: RCW 43.20.050 and Chapter 70.83 RCW
Board Contact: Molly Dinardo:, 564-669-3455
Department of Health Contact: John Thompson: john.thompson@doh.wa.gov206-418-5531