If your prospect decides to keep their employer-sponsored health insurance plan into Medicare, then it is VITAL that you keep tabs on the plan. For many companies, retiree benefits are a huge cost they may be looking to reduce or even avoid. If this happens, you need to be aware of it and react to help those affected by the changes.
Example:
There was a large automotive plant several years ago that decided that any non-union retiree will no longer receive their health insurance plans but rather an allowance to go purchase their own individual plans from the market. This left a lot of people scrambling to acquire coverage.
If you keep tabs on which prospects in your CRM have what retiree coverage, you could easily pull a list from your CRM and start calling them asking if you can help them navigate their options. Not only would the prospect be thankful that you were there to help them, but also impressed that you kept tabs on them and were there at their time of need.