I had a friend who kept complaining that she ran out of medicine at the end of every month. This went on for 3-4 months. So I called the Police and reported it and asked them to do a Wellness Check and make sure she had enough medicine. (She had a brother who was her Legal Guardian and she kept saying he would not give her the money for her medicines).
Well, the Police went and checked on her and found the situation to be as I described. They initiated a blood test (she told me later) to see what levels of medicine were in her blood. She was depleted in several medicines, of course.
She was placed in an Assisted Living Facility for folks with Dementia, as it may have been that she was either forgetting to take her meds sometimes or was taking them twice or 3 times, due to having forgotten that she had already taken them.
I have been to visit her where she is now and she is happy there. (She is 79 yrs old).
So, the Wellness Check will depend upon what the person who calls the Police tells them. I gave them details, including that she had a Legal Guardian who was not seeing to it that she was well. In other words, she was being neglected and that was proven to be true by the blood test and other questioning.