Understanding Medicare’s Credentialing Process for Doctors

📌 What Is Medicare “Credentialing”?

Medicare credentialing refers to the process by which the Centers for Medicare & Medicaid Services (CMS)
verifies that a doctor or provider is qualified to deliver healthcare services and bill Medicare for those
services. This means confirming your:

• Medical licensure
• Qualifications and credentials
• Eligibility to be paid as a Medicare provider

Only providers who are successfully credentialed and enrolled can submit claims to Medicare and receive
reimbursement.

Step-by-Step: Medicare Credentialing & Enrollment

1. 🔍 Step 1 — Get Your National Provider Identifier (NPI)Before anything else, physicians must have an NPI (National Provider Identifier). This unique number is
   issued through the National Plan & Provider Enumeration System (NPPES) and identifies you in standard
   electronic transactions.

   If you don’t already have an NPI, you must apply for one before enrolling with Medicare.

2. 📄 Step 2 — Complete the Medicare Enrollment ApplicationMedicare enrollment isn’t automatic — you must submit a formal application. CMS has made this easier with
   PECOS.

   📌 What is PECOS?

   PECOS (Provider Enrollment, Chain, and Ownership System) is CMS’s online system for Medicare enrollment.
   It lets you:

   • Fill out and submit your application electronically
   • Upload required documents
   • Track application status
   • Update your enrollment information

   Using PECOS is faster and more efficient than paper applications — and it helps reduce errors and
   processing delays.

   📌 Paper applications

   If you can’t use PECOS, there are still paper enrollment forms (such as CMS-855I) you can submit, but
   these typically take longer to process.

3. 💰 Step 3 — Application Fee (If Applicable)Not all providers pay an enrollment fee, but institutional providers and DMEPOS suppliers generally do.
   The fee for 2025 is $730, payable as part of your PECOS enrollment submission.

   Physicians and many non-physician practitioners don’t pay the fee when enrolling solely to bill Medicare
   Part B.

4. 🧾 Step 4 — Primary Source VerificationCMS or its contractors will verify your credentials directly with primary sources — for example:
   • State medical boards
   • Residency programs
   • Other official credentialing entities

   This ensures your education, licensure, and qualifications are current and valid. It’s a thorough review
   intended to protect patients and the Medicare program from fraud or unqualified providers.

5. ⏱️ Step 5 — Processing and Follow-UpOnce your application is submitted, the Medicare Administrative Contractor (MAC) assigned to your region
   reviews it. During this review:
   • You may be asked for additional documents
   • A site visit might be required in certain situations
   • Your application status can be checked online in PECOS

   Processing times vary — from several weeks to a few months — so plan accordingly.

6. 🔄 Step 6 — Revalidation (Ongoing Compliance)Credentialing doesn’t end after enrollment. Medicare requires providers to revalidate their enrollment
   information periodically to:
   • Confirm that contact info is current
   • Verify that licensure and practice status haven’t changed
   • Adjust for new practice locations or ownership changes

   Keeping this up to date helps protect your Medicare billing privileges.