Medicare enrollment for a new practice: the order of operations. The practice goes in before its clinicians.

Medicare's enrollment system reads from records that exist before it. Whatever is wrong in those records gets carried into the application, and the application waits while someone explains the difference. So the order below starts earlier than most owners expect.

Start with the record everything else copies.

Every clinician has an individual National Provider Identifier. A group practice has one of its own. Both sit in NPPES, the national register that CMS keeps and publishes.^A The name, address and specialty on that record travel into the Medicare application and into every commercial file after it.

We read the NPPES record for the practice and for each clinician before anything is filed. An old suite number or a former employer's address takes minutes to correct there. Found later, it comes back as a request from the Medicare contractor, and the file sits until someone answers it.

PECOS is Medicare's own system, and it does not read CAQH.

Most commercial payers pull a clinician's history from CAQH, the shared credentialing profile. Medicare does not. It enrolls through PECOS, its own online system, separate from CAQH, and it asks its own questions about who owns the practice and where it sees patients.

That changes the plan. A complete CAQH profile helps with the commercial plans and does nothing for Medicare. Both files get built, and both have to agree with each other and with NPPES. CAQH also has to be re-attested on a set cycle, so a profile that was current when you filed can lapse while a commercial application is still open.

The practice first, then each clinician, then the link.

Medicare's order has three parts. The practice enrolls as an organization. Each clinician enrolls as an individual. Then each clinician reassigns their Medicare payments to the practice, so a claim billed under the group pays the group.

Filed out of order, the pieces have nothing to attach to. A reassignment needs an enrolled practice to point at. A practice enrolled with no clinicians linked to it has nobody whose visits it can bill. When a new clinician joins a practice Medicare already knows, the first step drops away and the other two remain.

We price Medicare like any other payer on the list. A group pays $350 for the practice's own application and $250 for each clinician. A solo clinician who owns the practice files one application per payer, at $350.^G

Timing, and the one date that matters.

Of the payers a new practice files with, Medicare usually answers first. The commercial plans take months, and Medicaid depends on the state.^B

The answer that counts is the effective date on Medicare's approval letter. From that date Medicare pays that clinician's claims at that practice. Plan the first weeks of the schedule around it, and do not assume Medicare will reach back to cover visits from before it. When a case turns on how far back a date can go, we check the rule for that case and put the answer in the enrollment file.

Groups notice when this goes wrong. When MGMA polled medical groups, 54% reported that denials tied to credentialing were rising.^C It was a one-question poll of members, and an older one, but the direction matches what the enrollment file is there to prevent.

What a new clinician can bill while the file is open.

Seeing patients before the effective date is allowed. Billing Medicare under the new clinician's own name for those visits is the risk. Medicare's incident-to rule can let a visit bill under an enrolled physician instead, on two strict conditions: that physician supervises directly, on site, and the visit follows a plan of care the physician already set.^D

It is a bridge for supervised work. It does not stand in for enrollment, and commercial plans set their own limits on it. The answer for each plan goes into the enrollment file before anyone bills under it.

Two Medicare enrollments that sit outside the main file.

The first is equipment. A practice that supplies durable medical equipment needs its own Medicare enrollment as a DMEPOS supplier. The plainest case is a dentist fitting an oral appliance for sleep apnea. It is billed to medical insurance under HCPCS E0486, and for Medicare the dentist has to be enrolled as the supplier.^E

The second is Medicare Advantage. Those plans are run by private insurers with networks of their own, held to CMS network adequacy standards.^F Enrollment in traditional Medicare does not put a clinician in any of them. Each Medicare Advantage plan your patients carry is its own application, and its panel can be closed. Our note on closed panels covers what happens then.

To open a Medicare file we need each clinician's NPI, the practice's tax ID and service address, and the names of its owners. We gather the rest. Once the effective date is set, Medicare claims go out under it, and if we run your billing we follow each one to payment.