Every enrollment timeline you will hear quoted assumes a clean application and a practice that answers the phone. Real files get developed for a missing W-9, a signature dated four months ago, or a CAQH profile that expired while the provider was on vacation. The ranges below come from the regulations and the payers’ own manuals, so a start date can be planned instead of hoped for.
What this covers
- Medicare sets the effective date at the later of the filing date or the first date of service at the location, so a late filing costs billable months.
- Medicare pays retrospectively for up to 30 days before that effective date, and only for the provider types listed in 42 CFR 424.521.
- A development request gives the practice 30 calendar days to answer. Miss it and the application is rejected, with no appeal rights.
- State Medicaid programs publish their own maximums, from 30 days in Washington and Minnesota to 180 days in California for non-physicians.
- Commercial decisions go to a credentialing committee, so a plan whose committee meets every other month adds weeks that no paperwork fixes.
The filing date is the effective date. Work the practice did before that filing is unbillable to Medicare.42 CFR 424.520(d) makes the contractor’s receipt date the earliest possible start.
Where a rule is federal, the citation is in the text. Where the number is a payer policy, the manual is in the sources. The planning numbers below are built from both.
The date that decides when you can bill
Medicare answers this with one regulation. Under 42 CFR 424.520(d), the effective date of billing privileges for a physician, a non-physician practitioner or their organization is the later of two dates: the date the Medicare contractor receives an enrollment application that it later approves, or the date the provider first furnished services at a new practice location. A practice that opens on March 1 and files on May 1 has an effective date of May 1. March is gone.
Retrospective billing softens that, but only a little. Under 42 CFR 424.521(a), the listed provider types may bill for services furnished up to 30 days before the effective date, and up to 90 days if a Presidentially declared disaster prevented enrolling earlier. The list covers physicians, non-physician practitioners, their organizations and several therapy types. Dates of service before that window are unbillable.
The filing date is not the day the form is started. It is the day the contractor receives an application it can process to approval, and a missing signature or a missing W-9 moves that date later. Providers may file up to 60 days before the requested effective date, which leaves room to land the receipt date on the day the practice wants.
| Submission and screening | CMS timeframe |
|---|---|
| PECOS, no site visit, development or fingerprinting | 15 calendar days |
| PECOS, with a site visit, development or fingerprinting | 50 calendar days |
| Paper, no site visit, development or fingerprinting | 30 calendar days |
| Paper, with a site visit, development or fingerprinting | 65 calendar days |
Those are the timeframes CMS allows Palmetto GBA to take, published in August 2025, and they do not count clock stoppages. CMS has estimated that 30 to 35 percent of enrollment applications need at least one round of corrections, and each round runs on a 30-day clock.
A physician or group may file up to 60 days before the requested effective date. File early enough that the receipt date lands on or before the first Medicare appointment.
Realistic ranges by payer type
Once the file leaves Medicare fee-for-service, the timeline belongs to the payer. The middle column is what the payer or the state says in writing. The third column is a planning number, not a promise.
| Payer | What the payer states in writing | Planning number |
|---|---|---|
| Medicare Part B, individual, filed in PECOS | CMS timeframe of 15 calendar days for a clean file with no screening | 30 to 60 days |
| Medicare Part B, paper | 30 calendar days clean, 65 with development or a site visit | 60 to 120 days |
| State Medicaid, fee-for-service | State maximums from 30 days in Washington and Minnesota to 90 days in Kentucky and New York | 60 to 120 days, longer in California |
| Medicaid managed care credentialing | State maximums from 45 days in Minnesota and Kentucky to 90 days in Colorado, New Jersey and Texas | 90 to 150 days including contracting |
| Commercial and Medicare Advantage | Payer manuals quote 60 to 90 days typical, with a 120-day outer limit on verification | 60 to 120 days |
Behavioral health practices land at the slow end of that table. California allows 180 days for non-physician enrollment, and most behavioral health providers are not physicians, although plans regulated by the state’s Department of Managed Health Care must process complete behavioral health credentialing files within 60 days. Elsewhere screening decides: a moderate-risk designation requires a pre-enrollment site visit under 42 CFR 455.432, and a high-risk designation adds fingerprints under 42 CFR 455.434.
A state maximum means the agency must finish by then. It does not mean the clock starts the day the packet is mailed. Florida starts its 60-day clock at submission and gives 21 days to fix a deficiency before the application is denied.
The four things that restart the clock
Most late files were not slow. They stopped and started again. These are the events that send an application back to the beginning, with the rule behind each one.
| What happened | The rule | What it costs |
|---|---|---|
| A missing document, an unsigned form or an unanswered question | The contractor sends one development request and allows 30 calendar days to respond, per 42 CFR 424.525(a)(1) | No answer means rejection, a new application and no appeal rights, per 42 CFR 424.525(c) and (d) |
| A signature dated more than 120 days before the contractor receives it | An explicit rejection ground under 42 CFR 424.525(a)(1)(iv) | A fresh signature and a new receipt date |
| A CAQH profile that has gone stale | Re-attestation is due every 120 days, or every 180 days for providers in Illinois | BCBSTX discontinues the file if the CAQH application is not finalized within 45 days |
| A change while the file is open | Ownership, an adverse legal action and a practice location change must be reported within 30 days, other changes within 90 (42 CFR 424.516(d)) | The new information is verified from scratch, and a new location is a new screening event |
| The committee calendar | NCQA-based programs decide at a designated credentialing committee | A plan whose committee meets every other month adds up to eight weeks after the file is complete |
The last row is the one no amount of paperwork fixes. One California plan states that its Peer Review and Credentialing Committee meets every other month, and that the county commission granting final approval meets monthly. A complete file submitted the week after a meeting waits for the next one.
A rejection under 42 CFR 424.525 carries no appeal rights and requires a new application. A denial under 42 CFR 424.530 is appealable: a corrective action plan is due within 35 calendar days and a reconsideration request within 65 calendar days.
Sequencing enrollment for a start date
Work backwards from the start date. A provider cannot bill until the payer says so, so every step has to finish before day one rather than during month one.
Count back from the start date. Providers may file up to 60 days before the requested effective date, so a receipt date on or before the start date is achievable. That receipt date is the earliest possible effective date.
The legal name, address and taxonomy on the application have to match the NPPES record. A middle initial in one place and not the other is a development request.
State clocks start when a complete application is submitted. The screening category decides whether a site visit or fingerprints are in the path, and those steps add weeks.
One profile feeds every payer that uses it. Attest it, authorize each payer, then submit. A profile that expires mid-review stops the file, and some payers close it entirely.
Indiana requires each registered behavior technician to be enrolled separately and associated with each group, with fingerprints done before the application and site visits for ABA group enrollments under specialty 615. The technician who delivers 97153 has to appear on the enrollment where the state says so.
- The NPPES record matches the application character for character
- The signature is dated within 120 days of the expected receipt date
- The CAQH profile is attested and every payer is authorized
- The state Medicaid application is submitted at least 90 days before the start date
- Every location the provider will bill from appears on the application
- Every technician who will be listed on a claim is enrolled where the state requires it
- The approval letter, with its effective date, is filed with the credentialing record
File the reassignment with the individual application so the group can bill from the same date, and hold claims until the approval letter confirms the effective date. Credentialing work is mostly calendar work, and the calendar is set long before the first claim goes out. When a start date is already inside 90 days, book the filing calendar review first.
How to tell a slow file from a stalled one
A file that is moving has a status. A file that has stopped has a letter. The development letter names the missing item and starts the 30-day clock. A stay status is the second signal, applied in PECOS for 30 days to a change of information or a revalidation when no response arrives.
Deactivation is the expensive version of the same problem. A provider may not receive payment for services furnished while deactivated, and the effective date of a reactivation is the date the contractor received the reactivation submission that it approved. Nothing about a deactivation is backdated.
Ask three questions when a file goes quiet. Has a development request been issued, and on what date? Has the file been assigned to a committee, and when does that committee meet? Is the payer’s public directory already showing an effective date?
In review can mean anything. A named committee date, or a request for one specific document, tells the practice what to do next.
What the payer is actually verifying
Credentialing is a verification process with a shelf life. One national plan’s 2025-2027 credentialing plan requires every element in a file to be verified within 120 days of the decision date, and the attestation signed within 180 days. NCQA’s 2025 standards shortened the verification window and require the practitioner to be notified of the decision within 30 calendar days.
The element list is short: state license, board certification, DEA or CDS registration where required, malpractice coverage and claims history, work history, sanctions, and Medicare and Medicaid exclusions. Two of them cause most of the back and forth. A work history gap of more than six months needs an explanation in the file, and a malpractice history that does not match the attestation becomes a written discrepancy the practitioner has to answer.
The file has to stay current after approval. NCQA requires monthly monitoring of sanctions and license expirations between cycles, plus recredentialing every three years. Medicare Advantage plans must recredential at least every three years under 42 CFR 422.204(b)(2)(ii), and Medicare runs a five-year revalidation cycle of its own, with the application due within 60 calendar days of the notice.
None of this is abstract when a payer is late. A credentialing denial has to go to the credentialing desk rather than the appeals queue, where a clinical review costs weeks and returns the same answer. Medical billing services teams see the pattern first in the aging report.
Payers pull from the same sources. A mistake in the NPPES record or a stale attestation follows the provider into every credentialing file, and each payer discovers it on its own schedule.
Credentialing timeline questions, answered
Medicare fee-for-service is the fastest path when the file is clean. CMS allows its contractor 15 calendar days for an electronic application with no site visit, development or fingerprinting, and 50 calendar days when screening is needed. Commercial and Medicaid managed care files typically run 60 to 120 days, and state Medicaid maximums range from 30 to 180 days.
For Medicare, yes, for up to 30 days before the effective date, and only for the provider types listed in 42 CFR 424.521. The effective date itself can be no earlier than the contractor’s receipt date, so the window opens backward from the filing, not from the day the practice opened. Most Medicaid programs and commercial contracts pay nothing before approval.
Because 42 CFR 424.520(d) sets the effective date at the later of the filing date or the first date of service at the new location. Opening the doors before filing cannot move the date earlier. File up to 60 days before the requested effective date so the receipt date lands on or before the day the provider starts seeing patients.
A development request that goes unanswered for 30 calendar days ends in rejection, which requires a new application. A signature dated more than 120 days before receipt is a rejection ground. A CAQH profile that expires mid-review stops the file, and a location or ownership change during review sends the new information through verification again.
Usually. States publish maximum completion times that range from 30 days in Washington and Minnesota to 90 days in Kentucky and New York, with California allowing 180 days for non-physicians. Medicaid managed care credentialing is a second process on top of state enrollment, with its own maximums from 45 to 90 days, and each plan’s committee decides on its own calendar.
At plans that follow NCQA standards, yes. A designated credentialing committee makes the decision, and its meeting schedule sets the ceiling on turnaround. One California plan states that its committee meets every other month and that the county commission granting final approval meets monthly. A complete file submitted the week after a meeting waits for the next one.
Submit a file that cannot be developed. Match the NPPES record exactly, sign and date the application within 120 days of receipt, attach every supporting document the first time, and attest the CAQH profile before submission. CMS estimates that 30 to 35 percent of applications need at least one round of corrections, and each round runs on a 30-day clock.
The bottom line
A credentialing timeline is a filing deadline in disguise. The date the payer receives a complete application is the date the provider can bill from, and the four events that restart the clock are all preventable. Build the sequence backwards from the start date, and put a date rather than a stage on every follow-up.
When does your next provider need to be billing?
We file Medicare, Medicaid and commercial enrollments, keep CAQH profiles current, work every development request to its deadline, and hold claims until the effective date is confirmed. Send the start date and the payer list, and we will map the filing calendar backwards from it.
Request a free enrollment auditThis article describes Medicare, Medicaid and commercial credentialing requirements as published at the time of writing and is not legal advice. Timelines vary by Medicare Administrative Contractor, state and payer, so confirm current requirements with each one.
