Yes. For example, a beneficiary with only Part B Medicare would have Medicare as primary even if the beneficiary is covered by an employer’s health plan. This is based on Medicare regulations stating that a beneficiary must have both Part A and Part B Medicare for the MSP provisions to apply. Also, Medicare may be primary if the beneficiary’s entitlement to Medicare is based solely on end-stage renal disease (ESRD) and the beneficiary has completed his or her coordination period.
Note: A beneficiary with only Part B coverage is not a common occurrence.
last updated on 04/11/2013