In Oregon you can't work in a Hospital without having a CNA 2 in Acute Care. The OSBN made it a requirement about 8 years ago that you had to have added certification to your CNA. If you were working in a Hospital at the time they rolled that rule out, you were "grandfathered in", but still had to take the state test. They have pretty high standards here, I think you can work in Nursing Homes with a CNA 1, but it helps to have your CNA 2 in Dementia care (not required though).
What's funny is, if you work for the Federal Government, you don't have to have your CNA 1 or 2, just have to have had your certification at one time, training and or experience as a caregiver.
You also have to have your BLS certification to work in any medical setting, Hospital, Nursing home and or VA hospital.