Step 1: Determine You are in the Right Place

If you are currently an enrolled health care organization that is changing your Tax ID and the change does not involve a change of ownership, it is essential that you report changes of Tax ID within 30 days of the effective date of the change by submitting a new application with the new Tax ID. 

Step 2: Complete the Medicare Application

It is imperative that you submit the proper documentation along with your enrollment application regarding your new application, CMS-855A, to change the Tax ID. Whether you chose to file electronically or on paper, you must prepare and submit documentation as follows:

• To submit your application electronically, you will access PECOS, the online Provider Enrollment, Chain and Ownership System. Here you will be able to submit your new application. Select the My Enrollments button and the system will guide you through the process and ensure that you complete the required forms.
• To submit your application by mail, you will fill out form CMS-855A (instructions for completion are on the form) and follow the instructions regarding where to mail the application. Complete sections 1A and 1B of the CMS-855A application to determine required sections.

Step 3: Submit Required Documentation

It is imperative that you submit the proper documentation along with your enrollment application regarding your change to Tax ID. Whether you chose to file electronically or on paper, you must prepare and submit documentation as follows:

• Online via PECOS: PECOS will generate a list of required supporting documentation.
• Paper Form CMS-855A: See section 17 of the CMS-855A application to determine the required documentation

Related Content

• Medicare Provider-Supplier Enrollment
• The Basics of Medicare Enrollment for Institutional Providers
• Tips to Facilitate the Medicare Enrollment Process