sentences:  Tens of thousands of Oregonians signed up, competing for 3,000 openings.In 2008, the Oregon Health Authority began implementing changes to Medicaid policy to increase screening rates and provide more access to services for young children at risk of developmental disorders.Some of these changes included revising certification requirements for patient-centered medical home (PCMH) status to include developmental screenings for children at the 9-month, 18-month, and 30-month well-child visits.