California law requires that children entering first grade must provide their schools with a certificate documenting that they have had a preventive, well-child screening exam or a waiver of the exam signed by the parent or guardian. The exam may be done up to 18 months prior to, or within 90 days after, entrance into first grade. Providers must give the parent or guardian of a child entering kindergarten or first grade a certificate documenting that the child has received the health exam. A child may be certified without a preventive, well-child screening exam if the child has received a physical exam and ongoing comprehensive medical care from that physician during the 18-month period prior to, or within 90 days following, entrance into the first grade. Health Net and local schools urge parents to get their child's health assessment on entry into kindergarten. If a health assessment is refused by the parent or guardian, the parent or guardian must submit a waiver to the school.