Quick answer: Once your legal entity exists, getting a new medical practice ready to bill insurance runs in eight phases: (1) make the organization enrollable — Type 2 group NPI, consistent legal name, TIN and W-9, a locked-down service location, and a bank account for payer deposits; (2) build a complete file for each provider, including a reviewed CAQH profile; (3) research the market and build a tiered payer list instead of applying to every plan; (4–6) enroll with Medicare through PECOS (organization, individuals and reassignment), with state Medicaid and its managed-care plans, and with Tier 1 commercial payers, tracking each application past “approved” to contracting and a confirmed effective date; (7) build the billing infrastructure — EHR/PM configuration, clearinghouse, EDI, EFT and ERA — while payers process; and (8) connect credentialing status to scheduling so the front desk knows which plans and providers are active. There is no universal timeline; work backward from the opening date and run the tracks in parallel.
You formed the business. You have the vision, maybe a location, an EHR, a provider start date and a target opening month. A practice can have providers ready to see patients, 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.
Where this begins: 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 exists, payer applications will need the legal business name, tax identification number, ownership information, business address and contact information, banking information, and organizational documents where required. Credentialing is one of the easiest launch tasks to start too late — it can 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. Work backward from the intended opening date and begin as early as reasonably possible.
Phase 1: build the practice foundation
- Obtain the organizational NPI. Physician groups generally use a Type 2 NPI; individual clinicians use Type 1. An NPI identifies the practice but does not credential it, enroll it with Medicare or any plan, or guarantee payment (CMS NPI fact sheet).
- Make the tax information consistent. Legal business name, TIN, W-9 and addresses ready. Small inconsistencies between NPPES, payer applications, banking records and tax information create unnecessary delays.
- Lock down the practice location. Physical service address, mailing address, billing address, phone, fax, hours, credentialing contact and billing contact. If the location is still changing, know which applications can move and which must wait.
- Prepare banking early. Medicare EFT enrollment (CMS-588) and many commercial payment setups require banking information and supporting documents. Do not leave payment infrastructure until the end.
Phase 2: get the providers ready
For each provider, confirm the information and documents that will be reused across applications: individual NPI, professional license, DEA registration when applicable, malpractice coverage, specialty and taxonomy, Medicare and Medicaid status, education and training, board certification, work history, hospital affiliations when relevant, CV and supporting documents, CAQH access, and 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 before applications begin. Build it once — a complete provider file makes every downstream application easier. (If you are adding providers to an existing practice, see credentialing a new provider in eight steps.)
Phase 3: stop before you apply to everybody
A new practice does not need to credential with every insurance company it can find. More payer contracts do not automatically mean more good business: every additional payer is another application, contract, fee schedule, portal, set of rules, maintenance cycle and source of claim complexity. 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. You did not build a payer strategy — you collected contracts. Before asking “which payers can we join?” ask “which payers does this practice actually need?”
Research the market before building the payer list
| Look at | Why |
|---|---|
| Local market | Which insurers and products are common in the city, county and service area? Markets change dramatically across short distances. |
| Target patients | Age, specialty, geography, income characteristics, referral patterns and expected Medicare/Medicaid population shape the payer strategy. |
| Major employers | Hospitals, school districts, municipalities, universities and large employers drive which commercial plans show up repeatedly. |
| Competitors | Review payer participation among comparable local practices — as evidence, not a template. |
| Referral network | Referral-dependent specialties need the networks that matter to hospitals, PCPs and other volume sources. |
| Public data | CMS publishes Medicaid managed-care enrollment and Medicare Advantage enrollment data by plan and county. |
Evidence beats brand recognition. Credential because the payer matters to your patients, your referral network or your business strategy — not because the logo is familiar.
Build a payer priority list
| Tier | Definition |
|---|---|
| Tier 1 — must have | Core launch payers: Medicare, Medicaid, dominant commercial plans, key managed-care products, plans critical to major referral sources. |
| Tier 2 — strategic | Meaningful potential value, worth pursuing, 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. |
Score each candidate payer on market presence, expected volume, reimbursement, referral importance, administrative burden, network access (closed, limited or open) and strategic value. You do not need every payer before day one; build the right network first and expand once you have patient, referral and revenue data.
Phases 4–6: enroll with the payers that matter
4. Medicare
If Medicare matters to the target population, address it early. PECOS is CMS’s online enrollment system; a new practice may need the organization enrolled (CMS-855B), individual practitioners enrolled (CMS-855I) and reassignment relationships established, plus locations, supporting documents, EFT (CMS-588) and effective dates (CMS enrollment applications). The question is not “do our providers have Medicare?” but “can Medicare correctly process and pay claims for these providers through this organization?” Medicare is also the only payer that publishes processing standards — see the MAC timeframe table on our credentialing services page.
5. Medicaid
State-specific: enrollment, group affiliation, managed-care plans, provider-specific actions and location setup vary by state. Research which managed-care plans have meaningful enrollment in your service area before applying everywhere. In Texas that means TMHP enrollment first, then each MCO (Texas credentialing and provider enrollment).
6. Commercial plans
Once the priority list is built, begin payer-specific applications — CAQH, provider or group applications, rosters, ownership data, tax forms, contracting documents, provider-add forms and location information may all be involved, and some networks may be closed or limited. Tier 1 applications get first attention and the tightest follow-up.
Credentialing is not the same as contracting
Credentialing verifies the provider meets the payer’s qualification requirements; contracting establishes network participation — products, locations, effective dates, reimbursement and other terms. A payer may approve the provider from a credentialing perspective while the commercial relationship is still incomplete. Confirm the entire pathway before treating a plan as launch-ready, and track everything in a master tracker: payer, provider, application type, submission date, confirmation number, status, missing information, last and next follow-up, contract status, effective date, group affiliation, EFT/ERA/EDI status and billing-ready status. “Pending” needs context — since when, is the file complete, has the payer asked for anything, what is the next action, who owns it?
Phase 7: build the billing infrastructure — both bookends
Credentialing is one part of opening the revenue cycle; the practice also has to send claims and receive payments.
| Component | What to set up |
|---|---|
| EHR / PM | Providers, locations, payers, fee schedules and billing information configured correctly. |
| Clearinghouse | The route from the billing system to the payers, including payer IDs and enrollment requirements. |
| EDI | Payer-specific electronic claim enrollment or other transaction setup — do not discover this after weeks of claims are queued. |
| EFT | Electronic deposits so payer payments reach the practice bank account. |
| ERA | Electronic remittance so adjudication and adjustment data reach the billing system for posting and reconciliation (CMS on EFT and ERA). |
| Billing workflow | Who submits claims, works rejections and denials, posts payments, manages A/R and reports performance from day one. |
Choosing the system itself? See how to choose an EMR for a new practice.
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. Holding claims is sometimes appropriate, but not as a default without understanding payer rules, effective dates, timely filing, retrospective enrollment policies, provider status and contract requirements; if claims are held, leadership should know which, for whom, why, the expected effective date, the filing deadline and who is monitoring them. “Ready to open” means you can answer: which payers are active, pending or deferred; which providers are effective with each; can claims be submitted and payments received; is ERA configured; what will be held; who owns billing; who owns unresolved credentialing.
A practical new-practice timeline (a framework, not a promise)
| When | What happens |
|---|---|
| As soon as the entity is ready | Organizational NPI, provider files, CAQH review, demographics, banking preparation, payer market research. |
| Early credentialing | Medicare and Medicaid where applicable, Tier 1 commercial payers, managed-care plans, master tracker. |
| While payers process | EHR/PM setup, clearinghouse, EDI, EFT, ERA, billing workflows, scheduling guidance, reporting. Do not sit idle. |
| Before scheduling opens | Confirm payer and provider status, expected effective dates, scheduling rules, billing readiness, patient financial policies. |
| Before go-live | Run the bookend test — can claims go out and payments come back? 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 with real data. |
Parallel tracks save time: credentialing, technology, billing workflow and scheduling readiness should progress together.
Your first payer list should evolve
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 or creates friction. Credentialing should support the business strategy, not collect contracts. 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? Do we have the capacity to manage it well?
Common new-practice credentialing mistakes
| Mistake | What happens |
|---|---|
| Starting too late | The practice opens before payer enrollment catches up. |
| Applying to every payer | Resources spread across low-value plans instead of the networks that matter. |
| Assuming existing credentials transfer | A provider’s prior payer relationship does not establish the new organization, location or group affiliation. |
| Treating submission as completion | An application without follow-up is only an application. |
| Ignoring EFT / ERA / EDI | Credentialed, but unable to submit claims, receive payments or reconcile remittances efficiently. |
| Separating credentialing and billing | Credentialing knows a payer is effective while billing does not — or scheduling assumes a payer is active when it is not. |
| No reason for the payer | Nobody can explain why a plan is on the list beyond “we thought we should take it.” |
| No clear owner | Open tasks with no next action, follow-up date or accountable person. |
The launch checklist, condensed
Business foundation: entity formed; EIN/tax information; business bank account; W-9; organizational NPI; practice address; ownership information. Provider foundation: individual NPIs, licenses, DEA where applicable, malpractice, CV/work history, CAQH reviewed, documents collected. Payer strategy: target population identified; local commercial, Medicare, Medicaid, managed-care, Medicare Advantage, employer and referral-network research done; competitor participation reviewed; Tier 1 and Tier 2 lists created; low-priority payers intentionally deferred. Credentialing: Medicare, Medicaid and Tier 1 commercial applications submitted; affiliations, contracts and follow-up dates tracked; effective dates confirmed. Revenue-cycle infrastructure: EHR/PM, clearinghouse, EDI, EFT and ERA configured; payer IDs, providers and locations loaded; claim and posting workflows tested. Go-live readiness: active and pending payer lists distributed; scheduling and billing teams educated; held-claim process, timely-filing monitoring, escalation process, A/R and denial reporting in place.
Five questions to answer before you open
- Who are our five most important payers? If the answer is “we applied to everybody,” go back to 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.
If this sounds like a lot to build while you are also opening a practice, it is. Once your legal entity is formed, AMS Solutions can take the credentialing and payer-enrollment work from there — payer research and prioritization, provider files, Medicare and Medicaid enrollment, commercial applications, contracting and group affiliations, payer follow-up, effective-date monitoring, and coordination with billing readiness, since our credentialing and billing teams work under one roof. You build the practice; we build the payer infrastructure behind it. Talk with us before you set an opening date or call (866) 488-6308. Physician-founded in 1992, Dallas-headquartered, in-house global team, US-led.
FAQs
When should a new practice start credentialing?
As soon as the legal entity, TIN, group NPI, location and banking details exist — months before the planned opening. There is no universal timeline, Medicare is the only payer that publishes processing standards, and commercial and Medicaid timelines depend on committee calendars and panel status, so work backward from the opening date and run credentialing in parallel with technology and billing setup.
Does a new practice need to credential with every insurance plan?
No. Research which plans your target patients and referral sources actually carry, tier the payers (must-have, strategic, revisit later), and credential with Tier 1 first. Every extra contract adds applications, portals, fee schedules and maintenance; expand once real patient and revenue data exists.
What is the difference between credentialing and contracting?
Credentialing verifies the provider’s qualifications; contracting sets the network participation terms — products, locations, effective dates and reimbursement. A payer can approve a provider’s credentials while the contract is still incomplete, so confirm both before treating the plan as launch-ready.
What does a new practice need for Medicare enrollment?
Organization enrollment (CMS-855B), individual practitioner enrollment (CMS-855I), reassignment of benefits to the group, EFT authorization (CMS-588), practice locations and supporting documents, all managed through PECOS, with effective dates confirmed before claims are released.
What does “ready to open” mean for billing?
You can state which payers are active, pending and deferred; which providers are effective with each; that claims can be submitted through the clearinghouse with EDI enrollments complete; that EFT and ERA are configured so payments arrive and post; what will be held and why; and who owns billing and any unresolved credentialing.
