Yes, there is a Special Enrollment Period for individuals who did not enroll in Medicare because of misrepresentation by, or incorrect information from their employer, a group health plan, or agents and brokers of health plans. You will need to provide the Social Security Administration evidence of the misrepresentation, either through documentation or a written attestation. You can enroll in Medicare without penalty starting from the date you notify the Social Security Administration of this error up to 6 months later. You can contact your local Social Security Administration office for more information.