Hi Bill,
I am relatively new to AC, but I currently place some of my health maintenance notes in the Past Medical History (e.g. Mammogram 10/3/06, colonoscopy 2001, PSA 2006 etc.).
I also use a section at the bottom of the Summary Page that allows you to record values and dates for cholesterol, HDL, HgbA1C etc.

Another possible approach was developed by David Ortiz, MD, a Texas family practitioner; he has written an excellent article on registries at
http://www.aafp.org/fpm/20060400/47usin.html
I plan to try his idea to follow my diabetics; it would be great if it would integrate with AC.
Best,
Jim

Jim Blaine, MD
Solo FP
Digital Monitoring Products (DMP)
2500 N. Partnership Blvd
Springfield Missouri 65803