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Medicare provider / supplier specialty codes

December 31, 2025
Here is the list of Medicare provider / supplier specialty codes you can use as a reference during the enrollment process.

Enrolling and reporting changes

February 10, 2026
Access everything you need to know about initially enrolling or reporting changes to your Medicare enrollment.

Submitting a provider enrollment appeal: Corrective action plan or reconsideration request

February 27, 2026
Learn how to submit a provider enrollment appeal in the form of a corrective action plan or reconsideration request.

New provider roadmap: Provider enrollment 

February 18, 2026
View the provider enrollment section of our roadmap for new providers.

Top reasons for immediate returns of enrollment applications

February 13, 2026
Review this article to learn how to avoid an immediate return of an enrollment application.

Tips to avoid deactivation or revocation of your Medicare billing privileges

February 17, 2026
View these tips on how to avoid losing your Medicare billing privileges.

Hospital off-campus outpatient department enrollment requirements

February 17, 2026
Read this article for information on enrolling your hospital off-campus outpatient department sites.

Medicare enrollment for ‘mass immunizers’

March 6, 2026
An entity or individual who wishes to furnish mass immunization services - but may not otherwise qualify as a Medicare provider - may be eligible to enroll as a “mass immunizer.”

Samples of provider enrollment revalidation letters

February 10, 2026
The CMS sample revalidation letters offer providers the opportunity to see what they can expect to receive when it is time for revalidation or if they didn’t respond to a revalidation request.

PECOS application signatures

February 17, 2026
Read this article for information about signing provider enrollment applications using PECOS.
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