DECKCHAIR - a word of advice from my experience.
Doctor omits medical payment form with documentation reflecting burning hoops for medical. Call AVMED helpline to get in early and sort it out and get D who is disinterested, will not take ARN, name etc and advises that all will be well and will happen automatically (despite web site warning that it will bounce). Send payment form by fax anyway with instructions for use! Get letter in mail telling me to pay up or else (with incorrect address, handwriting of four year-old work experience student, - postie sorts it [learning point CASA - employ posties]).
Ring CASA helpline with letter to Bruce prepared with cc to Warren T and Bill Heff. Get M on the line and she is the perfect CASA employee - bless her heart. Sorts it in a minute. Suggests M gets fed this week and D doesn't.
Moral of the story - if you get D ask for M and every organisation is a victim of their employees.