CMS has published a revised Medicare Physician's Guide

This publication has been developed for Medicare Fee-For-Service (FFS) providers and suppliers. It provides the following information about the Medicare Program:

• Introduction to the Medicare Program;
• Becoming a Medicare provider or supplier;
• Medicare reimbursement;
• Medicare services;
• Protecting the Medicare Trust Fund;
• Medicare overpayments and FFS appeals; and
• Provider outreach and education.

http://www.cms.gov/MLNProducts/downloads/MedicarePhysicianGuide_ICN005933.pdf