Opening a New Medical Practice? Your Credentialing and Payer Enrollment Timeline
By Brad Becker, CRCR, Regional Billing Manager at AMS Solutions. 18-page printable PDF, free.
You formed the business. You have the vision, maybe a location, an EHR, a provider start date and a target opening month. How do you actually get the practice ready to bill insurance? A practice can have providers, a beautiful office, staff, equipment, marketing and patients asking for appointments, and still struggle to generate insurance revenue because payer enrollment is incomplete. Credentialing a new practice is not about submitting the largest possible stack of applications; it is about building the payer infrastructure the practice actually needs before patients walk through the door.
What’s inside
- Where this guide begins: after the legal entity exists, and what the practice needs on hand before enrollment starts
- Phase 1: make the organization enrollable (organizational NPI, consistent tax information, location, banking)
- Phase 2: get the providers ready, with CAQH reviewed before any payer is waiting on it
- Phase 3: stop before you apply to everybody; research the local market, patients, employers, competitors and referral network
- A tiered payer priority list (must-have, strategic, revisit later) and a simple payer decision matrix
- Phases 4-6: Medicare (PECOS), Medicaid (state by state) and commercial plans, and why credentialing is not contracting
- Phase 7: the billing infrastructure (EHR/PM, clearinghouse, EDI, EFT, ERA, workflow); Phase 8: connect credentialing to scheduling
- A practical timeline, common mistakes, a three-page launch checklist and five questions to answer before you open
Who it’s for
Physicians, owners and administrators opening a new practice or adding a new entity, and anyone who has been told “just apply to every payer” and suspects there is a better way.
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Where this guide begins
AMS starts after the legal entity exists. AMS Solutions does not form LLCs, corporations or other legal entities, and this guide is not legal or tax advice; your attorney or accountant should establish the business structure first. Once the entity is formed, the credentialing and revenue-cycle infrastructure can take shape. Before payer enrollment, the practice should generally have its legal business name, tax identification number, ownership information, business address and contact details, banking information and organizational documents where required. Do not wait until the office opens: payer enrollment may involve NPI registration, Medicare, Medicaid, commercial credentialing, contracting, group affiliations, effective-date confirmation, EFT, ERA, clearinghouse configuration and payer-specific EDI enrollment. There is no universal timeline that applies to every payer, specialty and state, so work backward from the intended opening date and begin as early as reasonably possible.
Phase 1: build the practice foundation
Obtain the organizational NPI (groups generally use a Type 2 NPI, individual clinicians a Type 1; an NPI identifies but does not itself credential, enroll or guarantee payment). Make the tax information consistent: legal name, TIN, W-9 and addresses, because small inconsistencies between NPPES, payer applications, banking records and tax information create unnecessary delays. Lock down the practice location: service address, mailing address, billing address, phone, fax, hours, credentialing contact and billing contact; if the location is still changing, identify which applications can move and which must wait. Prepare banking early, since Medicare EFT enrollment and many commercial payment setups need banking information and supporting documentation. The foundation test: can the practice consistently state its legal name, TIN, group NPI, location, ownership and banking information everywhere it will be used?
Phase 2: get the providers ready
For each provider, confirm the information that will be reused across applications: individual NPI, professional license, DEA registration where applicable, malpractice coverage, specialty and taxonomy, Medicare and Medicaid status, education and training, board certification, work history, hospital affiliations where relevant, CV and supporting documents, CAQH access, practice location and start date. CAQH should be ready early: for many commercial plans it is a core credentialing data source, so review demographics, locations, licenses, malpractice, education, work history, board information and hospital affiliations, and confirm supporting documents, authorization settings and attestation status are current. Build it once; a weak file multiplies the same missing-information problem across every payer.
Phase 3: stop before you apply to everybody
A new practice does not necessarily need to credential with every insurance company it can find. Every additional payer can mean another application, contract, fee schedule, portal, set of rules, credentialing-maintenance cycle and source of claim complexity. Credentialing is a business decision: before asking “which payers can we join?” ask “which payers does this practice actually need?” Imagine credentialing with fifteen commercial plans; six months later two produce most of the volume, three are occasional, five barely appear, one reimburses poorly and another consumes disproportionate staff time. That is not a payer strategy; it is a collection of contracts.
Research the market before building the payer list: the local market (which insurers and products are common in the city, county and service area), the target patients (age, specialty, geography, income characteristics, referral patterns, expected Medicare and Medicaid population), major employers (hospitals, school districts, municipalities, universities and large employers shape which commercial plans appear), competitors (review participation among comparable local practices as evidence, not as a template), the referral network (which networks matter to hospitals, PCPs and other sources of volume) and public data (CMS publishes Medicaid managed-care and Medicare Advantage enrollment data by plan and market). Evidence beats brand recognition; do not credential with a plan because the logo is familiar.
Build a payer priority list
Tier 1, must have: core launch payers such as Medicare, Medicaid, dominant commercial plans, important managed-care products or plans critical to major referral sources. Tier 2, strategic: payers with meaningful potential value worth pursuing but not essential to opening day. Tier 3, revisit later: limited expected volume, weak strategic value, questionable reimbursement or high administrative burden; reconsider once real practice data exists. You do not need every payer before day one. The guide includes a simple decision matrix that rates each payer on market presence, expected volume, reimbursement, referral importance, administrative burden, network access and strategic value.
Phases 4-6: enroll with the payers that matter
Medicare: if it matters to the target population, address it early. PECOS is CMS’s online enrollment system; a new practice may need the organization enrolled, individual practitioners enrolled and reassignment relationships established, with locations, supporting documents, EFT and effective dates confirmed. Do not stop at “do our providers have Medicare?”; ask whether Medicare can correctly process and pay claims for these providers through this organization. Medicaid is state-specific and may involve state enrollment, group affiliation, managed-care plans, provider-specific actions and location setup; research which managed-care plans actually have meaningful enrollment in the service area before applying everywhere. Commercial plans: once the priority list is built, begin payer-specific applications, which may involve CAQH, provider or group applications, rosters, ownership data, tax forms, contracting documents, provider-add forms and location information; some networks may be closed or limited. Tier 1 applications get the first attention and the tightest follow-up.
Credentialing is not the same as contracting. Credentialing verifies that the provider meets the payer’s qualification requirements; contracting establishes network participation terms such as products, locations, effective dates and reimbursement. A payer may approve the provider while the commercial relationship is still incomplete, so confirm the entire pathway before treating a plan as launch-ready. Track everything in a master tracker that shows more than “pending”: payer, provider, application type, submission date, reference number, current status, missing information, last and next follow-up, contract status, effective date, group affiliation, EFT, ERA, EDI and billing-ready status.
Phase 7: build the billing infrastructure
Credentialing is only one part of opening the revenue cycle. The practice also needs to send claims and receive payments; those are the two bookends. Configure the EHR/PM system (providers, locations, payers, fee schedules, billing information), the clearinghouse (the route to each payer, including payer IDs and enrollment requirements), EDI (some payers require electronic claim enrollment; do not discover that after weeks of claims are queued), EFT (electronic deposits), ERA (electronic remittance so adjudication information reaches the billing system) and the billing workflow (who submits claims, works rejections and denials, posts payments, manages A/R and reports performance from day one). The test: can we send a clean claim, and can we receive and post the payment?
Phase 8: connect credentialing to scheduling
Do not trap payer status in a spreadsheet. The front desk and scheduling team need to know which plans are active, pending or intentionally not pursued, and which providers are ready with each payer; otherwise patients get scheduled on assumptions that are not financially accurate. Should you hold claims? Sometimes, but not as a default without understanding payer rules, effective dates, timely filing, retrospective enrollment policies, provider status and contract requirements, and leadership should know which claims are held, for which payer and provider, why, the expected effective date, the filing deadline and who is monitoring them. “Ready to open” means you can answer: which payers are active, which are pending, which are deferred, which providers are effective with each payer, whether claims can be submitted and payments received, whether ERA is configured, what claims will be held, who owns billing and who owns unresolved credentialing.
A practical timeline, as a framework not a promise
As soon as the entity is ready: organizational NPI, provider files, CAQH review, demographics, banking preparation and payer market research. Early credentialing: Medicare and Medicaid where applicable, Tier 1 commercial payers, managed-care plans and the master tracker. While payers process: EHR/PM setup, clearinghouse, EDI, EFT, ERA, billing workflows, scheduling guidance and reporting; do not sit idle waiting for credentialing. Before scheduling opens: confirm payer status, provider status, expected effective dates, scheduling rules, billing readiness and patient financial policies. Before go-live: run the bookend test and review every unresolved Tier 1 payer. After go-live: continue payer follow-up, rejection and denial monitoring, A/R review, payer additions and payer-mix analysis using real data. Parallel tracks save time.
Do not over-credential before you have data
Six months after launch you will know things you could not know on day one: a payer that represents far more volume than expected, another that barely appears, a nearby employer creating new demand, a plan that reimburses poorly. Credentialing should support the business strategy, not the other way around. The new-payer test: do our patients actually have this plan, will it produce meaningful volume, does the reimbursement make sense, is it important to our referral strategy, and do we have the capacity to manage it well?
Common new-practice credentialing mistakes
Starting too late. Applying to every payer. Assuming existing credentials transfer to the new organization, location or group. Treating submission as completion. Ignoring EFT, ERA and EDI, so the practice is credentialed but cannot efficiently submit claims or reconcile remittances. Separating credentialing from billing and scheduling. Having no reason for a payer beyond “we thought we should take it.” Having no clear owner for open tasks. If nobody can explain why the practice is pursuing a payer, stop.
Five questions to answer before you open
- Who are our five most important payers? If the answer is “we applied to everybody,” go back and do the market research.
- Which payers are actually active today? Not submitted, not almost done. Active.
- Can we send claims? Run the workflow before real revenue depends on it.
- Can we receive and post payments? Do not forget the other bookend.
- Who owns everything that is still open? Every unresolved item needs an owner, a next step and a follow-up date.
The downloadable guide includes the full three-page launch checklist covering business foundation, provider foundation, payer strategy, credentialing, revenue-cycle infrastructure and go-live readiness. Sources: CMS NPI fact sheet, CMS PECOS and enrollment application guidance (CMS-855B, CMS-855I, CMS-588), the CAQH Provider Data Portal overview, the Medicaid.gov managed-care enrollment report, CMS Medicare Advantage enrollment data and CMS guidance on EFT and ERA. Requirements vary by health plan, state, provider type and market.
Prefer the printable version with the worksheets and checklists? Use the form above. And if you would like a second set of eyes on your own numbers, AMS Solutions offers a no-obligation review of your A/R and recent billing performance: call 866-973-2221 or email info@ams-solutions.com.
This guide is for general operational and educational purposes. Payer rules, contracts, timely-filing limits and practice circumstances vary; results are not guaranteed.