I have Kaiser in the MD/DC/VA area and this is my 3rd pregnancy under Kaiser. I have always been seen every 4 weeks or so (depending on what day is better for me personally for my appointments and availability) starting at week 9. At approx. 28 weeks, I go every 2 weeks and then around week 36 I start to go every week.
I am not sure of your state but that is not Kaiser's policy in area that I am aware or. Where are you located?
This is weird to be esp since you have your anatomoy scan at approx 20 weeks. How are you supposed to know when they have put in for you to schedule that and are they going to wait a whole month to give you the results of the scan should any issues arise?
I would switch doctors or call the kaiser advice line and ask them what the policy is. Maybe you should also consider another Kaiser facility in your immediate area if one is available