Starting a new PT/OT/SLP clinic means thinking ahead about Medicare. If you plan to treat Medicare beneficiaries, you must enroll in Medicare before billing. CMS explicitly notes, “Providers must enroll in the Medicare Program to get paid for providing covered services to Medicare patients”. In practice, this means you should apply early before seeing your first Medicare patient. Experts recommend beginning the process not prior to 30 days before your expected start of Medicare services. This lead time accounts for gathering documents, waiting for site visits, and processing the application.
Applying too late can delay payments. Because Medicare enrollment involves a thorough review (including a required on-site inspection), processing often takes 60–90 days or more. For example, one credentialing guide advises that you “can’t start the Medicare credentialing process until you open your practice” and then notes it “typically takes about 90 days to process.”

Key Preparations
- Obtain NPIs. Get your National Provider Identifiers before enrollment. CMS requires an NPI as a first step. If your clinic is a group practice, apply for an Organization NPI (Type 2), and ensure each therapist has an Individual NPI (Type 1. You can apply online at the NPPES website. Having NPIs ready is crucial for completing the enrollment forms.
- Gather Documents. Assemble all required credentials: your business’s EIN (Tax ID), state licenses (PT/OT/SLP licenses), proof of malpractice insurance, a copy of your clinic’s lease or ownership documents, W-9, and any other practice information. One guide emphasizes keeping organized records and checklists so nothing is missing. Missing or incorrect documents are a common cause of delays.
- Know Your Forms. Decide which Medicare application form applies. Most new therapy clinics (group practice or clinic) use CMS-855B (Clinic/Group Practice). If an individual therapist is enrolling a solo practice, they might use CMS-855I (Physician/Practitioner). Review CMS guidance: “Clinics and group practices… use [CMS-855B] to start Medicare enrollment”. Download the right CMS-855 form (or complete it via PECOS, see below).
- Plan Your Effective Date. CMS will assign an official enrollment date. You can usually request it to be up to 30 days before the application date (for example, to the date you opened your practice). In any case, apply before your first Medicare billing date. Services provided to Medicare patients before your enrollment is effective will not be reimbursed. By applying early, you help ensure your effective date aligns with your clinic’s launch or soon after.
Enrollment Process and Timing
- Submit the Enrollment Application: Enroll via the CMS online system (PECOS) or paper form. CMS outlines a simple 3-step process: get an NPI (done above), then “complete the Medicare enrollment application” in PECOS. In PECOS, answer questions to determine which CMS-855 form you need, enter your practice information, and upload supporting documents. (PECOS will walk you through certification and let you electronically sign.)
- Pay the Application Fee: For 2025, the standard Medicare enrollment fee is $730 for
institutional providers for certain transactions like initial enrollment, revalidation, or adding a new practice location. Physicians, non-physician practitioners, and physician or non-physician organizations are exempt from this fee.
- Coordinate with Your MAC: Once submitted, your Medicare Administrative Contractor (MAC) will review your application. They may request clarifications or additional documents. Importantly, Medicare typically requires an on-site inspection of your physical location to verify compliance and prevent fraud. You should be ready for an unannounced site visit during normal business hours. This step is unique to Medicare (unlike some private insurers) and is a key reason to ensure your practice is fully set up and staffed before applying.
- Allow for Processing Time: After submission, the clock starts. On average, fully completed applications are processed in about 2–3 months, though it can be shorter or longer depending on CMS workload. One industry expert advises, “It’s essential to start the enrollment process at most 30 days before the expected service date… to allow for any unexpected delays”. If anything is incomplete, the MAC may issue requests for information (RFIs), so be responsive to keep the timeline moving.
- Follow Up as Needed: If you haven’t heard back after a month, it’s wise to check with your MAC. Use the official MAC contact list to confirm they received everything. Tracking your application status in PECOS and keeping lines of communication open can help avoid surprises. Maintain your organization’s information (address, ownership, etc.) carefully during this period, any changes must be reported to Medicare promptly (usually within 30–90 days of the change).

After Approval
Once your MAC approves the enrollment, you will receive an official Medicare provider number (PTAN) and effective date. You can then begin billing Medicare. Note that upon initial approval, CMS gives you a window to decide on participation: as a Participating provider you accept Medicare’s fee schedule as payment in full, while as a Non-Participating provider you can charge up to 115% of Medicare rates. Most clinics choose to participate (accept assignment) to streamline billing.
Keep in mind: do not hold off seeing Medicare patients after approval, you are expected to serve and bill accordingly. Also remember that Medicare Part B covers outpatient PT/OT/SLP services only when criteria (e.g. medical necessity, proper documentation) are met. But once enrolled, your clinic can fully bill Medicare for eligible therapy services.
Summary
In summary, apply for Medicare enrollment early. Begin gathering credentials and NPIs during your clinic setup, then file the CMS-855 application via PECOS once you have a physical location and license. Allow ample time for the MAC review and site inspection. In doing so, you’ll ensure your new PT/OT/SLP clinic is ready to serve Medicare beneficiaries on day one. Early planning and complete documentation are the keys to a smooth Medicare enrollment process.

Why Choose Prime Credential
Prime Credential specializes in helping new therapy clinics navigate Medicare enrollment and credentialing efficiently. Our team:
- Ensures your CMS-855 forms and PECOS applications are completed accurately.
- Helps you gather and organize all required documentation to prevent delays.
- Provides guidance on enrollment timing to align with your clinic launch.
- Offers ongoing support with MAC follow-ups and site inspections.
Partnering with Prime Credential helps new PT, OT, and SLP clinics avoid costly mistakes, streamline the Medicare enrollment process, and focus on delivering quality patient care from day one.
Frequently Asked Questions (FAQs)
1. Can a therapy clinic start seeing Medicare patients before the enrollment is approved if the application is submitted?
No. Medicare will not reimburse services provided before the official effective date of your enrollment. However, you can begin preparing patients and documentation in advance to ensure smooth billing once approval is granted.
2. How can a clinic track the status of its Medicare application efficiently?
PECOS provides real-time updates on application status. Additionally, designating a staff member to communicate with your MAC can help respond promptly to requests for information and avoid delays.
3. Are there common errors that cause therapy clinic Medicare applications to be denied?
Yes. Common pitfalls include incomplete forms, missing NPI numbers, incorrect business licenses, or failure to provide proof of malpractice insurance. Using a credentialing service like Prime Credential can help prevent these issues.
4. How does enrolling as a group practice versus individual provider affect billing and reimbursement?
Enrolling as a group practice allows all clinicians under the clinic’s NPI to bill under the same PTAN, simplifying claims. Individual enrollment requires each clinician to have their own PTAN, which can be more time-consuming to manage.
5. Can changes in clinic ownership or location affect Medicare enrollment?
Yes. Any ownership changes, mergers, or relocations must be reported to CMS within 30–90 days. Failure to update these changes can result in claim denials or compliance issues.
6. Does Medicare enrollment impact the ability to contract with private insurers
Indirectly, yes. Many private insurers require proof of Medicare enrollment as part of their credentialing process. Completing Medicare enrollment early can streamline private insurance contracts.
7. What resources are available to help small therapy clinics prepare for the site inspection?
CMS provides guidance for what inspectors will check, but clinics can also use services like Prime Credential to conduct mock inspections, review compliance protocols, and ensure all documentation is complete.



