Waiting Periods and Exclusions Not Present In Original Medicare

10.5 - Waiting Periods and Exclusions Not Present In Original Medicare (Rev. 77, Issued: 10-28-05, Effective Date: 10-28-05) (Chapter 4, §20.6 of the Medicare Managed Care Manual) All beneficiaries must be provided all medically necessary benefits covered in the plan in which they enroll (including supplemental benefits) at the time of their initial enrollment. Waiting periods or exclusions from coverage, due to pre-existing conditions, are not permitted. However, a Medicare cost plan can deny coverage of Medicare-covered services when the services do not meet the standard of being medically necessary and appropriate. In addition, a Medicare cost plan may impose limitations or exclusions on Medicare-covered benefits to the extent that such limitations or exclusions are present in the original Medicare statute or regulations.