Creditable Coverage (Medigap) | Medicare Glossary

Previous health insurance coverage (such as a group health plan, Medicare, Medicaid or other health plan) that can be used to shorten a pre-existing waiting period under a Medigap policy. Health insurance coverage you had within 63 days of securing a new insurance policy can qualify for creditable coverage. Proof of coverage can be shown by a certificate of creditable coverage or other documents from the health insurance provider, such as a health insurance ID card.