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Internet-Based PECOS Enrollment

Physicians may enroll or make a change in their Medicare Part B enrollment information through Internet-based Provider Enrollment, Chain and Ownership System (PECOS).

Essential Links

Resources from the Academy


Resources from CMS

  • A Beginner's View of PECOS [PDF 101K]
  • Revalidation Requirements
    According to CMS, all physicians who enrolled with Medicare prior to March 25, 2011, will be required to revalidate their Medicare enrollment. Physicians have 60 days from the date of the revalidation notice to submit their complete enrollment information. You will receive a green revalidation letter through the mail when it is your turn.
  • CMS Contact Information Sheet [PDF 945K]
  • PECOS Step-by-Step Instruction [PDF 1.37MB]
  • Basics of Internet-based PECOS [PDF 1.85K]
  • Effective Oct 7, 2013,  Medicare Contractors may deny a Form CMS-855 enrollment application if the current owner of the enrolling provider or supplier or the enrolling physician or non-physician practitioner has an existing or delinquent overpayment that has not been repaid in full at the time an application for new enrollment or Change of Ownership (CHOW) is filed.

Provider Enrollment and Certification FAQs

Question Answer
After I submit my enrollment application, when can I start seeing patients and bill Medicare? You can start to see patients on the date you enter on your application as the “effective date”. Most practices will hold claims until the application is approved and then submit.
How long does it take for Medicare to approve my application? When submitting on paper, either by fax or mail, Medicare has 60 days to process your application. Be sure to choose one method of submitting. If duplicate applications are submitted (one by fax and one by mail), this can slow the process down and take longer than 60 days to process.

If you choose to submit via Internet Based PECOS, the application should be approved in 45 days. With that, CMS encourages providers to choose the Internet Based PECOS system to enroll.
My question isn’t listed here, where can I find more FAQ? Follow this direct link to CMS FAQ page for Provider Enrollment and & Certification.