Medicare Supplement (also called "Medigap Plans")…
…Is private health insurance coverage designed to pay for costs not covered by Original Medicare.
Every Medigap policy must follow federal and state laws designed to protect you, and it must be clearly identified as "Medicare Supplement Insurance." Insurance companies can sell you only a standardized policy identified in most states by letters.
All policies offer the same basic
benefits but some offer additional benefits, so you can choose which one meets your needs.