How often do you get evaluations on dementia for your loved one?

We take my mother every 6 months to get evaluated for her dementia

Does your mom take meds for her dementia? Does the doctor just tell you how far she's advanced and give you practical advice on what to do next?

My Dad sees his neurologist every 4 months, but has not had any tests done in about two years. Normally my Mom attends the appointment with the doctor, but I've told her that I will go into the appointment with them next time. Hopefully between her and I we can ask some specific questions (I'm not sure Mom remembers to ask or perhaps doesn't get her point across to the doctor, or if perhaps he just doesn't listen closely enough). I don't know how often an AD patient is supposed to get an MRI or take part in testing, but I would think it should be more frequent than my Dad has been getting. Normally the doctor just asks a few questions and checks the meds. Sometimes caregivers just need to put their foot down to get answers and results!