A beneficiary is currently eligible for medicare part A, who enrolls into part B is called an Original Medicare beneficiary.
Usually, individuals that are eligible for part B medicare are the following:
Those collecting Social Security retirement benefits;
Those collecting Social Security disability benefits for 24 months;
Those qualified to Medicare Part A.
Hence, in this case, it is concluded that a beneficiary is currently eligible for medicare part A, who enrolls into part B is called an Original Medicare beneficiary.
Learn more here: brainly.com/question/10641128