As a middle aged person or younger adult, one has the option of receiving health insurance through your employer.  This is great because they help burden the cost and if they are a large enough company then they can get some great discounts on volume insurance and large group plans.  This is not the case with senior citizens though.  Once retired, it is difficult to receive an affordable option due to age and health issues.  There are options and I wanted to list as many as I could here in order to help you find affordable insurance as a senior.

Organizations
There are many organizations that have "group purchase power".  They have a large number of people that can get together and with a volume discount get insurance that is a little more affordable.  The reason that this is possible is due to commissions and overrides that are paid to agents.  The commissions are a necessary part of the insurance industry in order to bring insurance customers to the actual providers.  When there is a large group of people, the commissions are very negotiable.  Some of these organizations are The American Seniors Association (ASA) and AARP.  The difference between the two of these groups is ASA is conservative group and AARP has been deemed or judged to be a more liberal group.

Shopping Around in Your Area
Shopping around is easy.  You can now sit at home and easily get the name and phone number of the agents in your area for the top 5 health insurance providers.  One phone call to each can give you a good estimate as to who has the best plan for senior citizens.  If you would like to check online for available options then there are a few companies who will provide multiple quotes from just one application.  These applications can be found here or on other various websites.