30-month coordination period for end-stage renal disease The period of time Medicare will act as a Secondary Payer after a beneficiary becomes eligible for Medicare based on end-stage renal disease. See Medicare Secondary Payer.

AAFP American Academy of Family Physicians

AAMC Association of American Medical Colleges

AANP American Association of Nurse Practitioners

ABN See Advanced Beneficiary Notice.

accepting provider A health-care provider who signs an agreement with Medicare to accept their policies in order to receive payment.

ACOG American College of Obstetricians and Gynecologists

ACS American Cancer Society

additional Medicare tax A 0.9 percent Medicare tax paid by individuals earning more than $200,000 or married couples ...

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