National Resources:
Medicare enrollment online
Centers for Medicare & Medicaid Services
My Medicare
US Healthcare site:
National Council on Aging
Administration on Aging
Benefits Check Up
US Department of Veterans Affairs
NIH Senior Health
Planning Your Doctor Visit
Staying Healthy as a Senior

State Resources:
Virginia Bureau of Insurance
DC Health Insurance Counseling
Institute on Aging, University of Virginia
Jefferson Area Board for Aging (JABA)
Valley Program for Aging Services

There are an infinite number of resources online. If appropriate, we will provide others during a consultation.