My best friend has very swollen feet, read quite wide, and can't wear anything tight on her ankles or feet. I made her a pair of toe up sport socks (ankle highs) with superwash wool sock yarn, knitted on size 3 needles to a gauge of 7 sts per inch, and didn't change to a smaller needle for the 1.5" cuff ribbing. She absolutely loves them - no pain, no cutting at the ankle.
I also made myself a pair just like hers - just like you diabetes foot care is important to me too. I wear a ladies size 9 and making them toe up with Magic Loop, cast 12 sts (needing a broad toe), and increased up to 56 sts. I used the lifestyle sock heel, and knit a few rounds (about 1") before working the cuff.
Finding a well fit sock has been heaven - I wish you the same luck that I had finding mine!