How to Get Medicare Benefits for a 97-Year-Old with Dementia and Colostomy?

I'm a lifetime member, having an ileo for 72 years but I am asking for advice regarding a 97-year-old female relative who has had a colostomy for 8 years. Her son is at his wit's end. He refuses to leave the house or let anyone else enter. Her MD refuses to issue authorizations for ostomy supplies because of not seeing her for 4 years, so despite having insurance, she is paying out of pocket. She can no longer take care of herself. Dementia is now very evident. Hygiene, ostomy management, and urinary incontinence make living at home no longer possible. Is there a way to get her into a SNF and get Medicare benefits despite having no primary doctor? It has reached the crisis point. I don't live nearby. Any input would be appreciated!

States have laws permitting some form of application by the son to a court for appointment of the son himself, or a professional, as trustee, so the woman can be committed for her own good and her ostomy and other medical needs seen to by the institutional healthcare staff.  

Thank you, Henry. To your knowledge, is a conservatorship required or is this application available from Adult Protective Services or other agency?

I'm really not comfortable answering that as all states have different laws and procedures available.  You might want to take advantage of a local legal aid lawyer to point you in the right direction.  

Any chance her son has any power of attorney?

No estate planning documents of any kind, unfortunately.

The California Aging and Adult Information Line is 1-800-510-2020.