Provider Credentialing Guide

How to get credentialed with insurance companies: the short version

If you are working out how to get credentialed with insurance companies, the work follows the same order for almost every provider: get the identifiers right, build one clean data profile, apply to government programs and commercial plans, then set up payment and keep everything current. Each payer reviews you separately, so the same details are submitted many times and must match every time.

This guide walks through each step for physicians, advanced practice clinicians, therapists and group practices. Payer rules change and differ by state and contract, so treat the details below as a map and confirm each payer's current requirements before you apply.

1. Confirm every license, DEA and board certification is active for each state where you will see patients.
2. Obtain or update the individual and group NPIs with the right taxonomy.
3. Set up and attest your CAQH ProView profile.
4. Enroll in Medicare through PECOS and in your state Medicaid program.
5. Apply to commercial, Medicare Advantage and Medicaid managed care plans.
6. Sign contracts, confirm effective dates and provider IDs, and complete EFT/ERA enrollment.
7. Track revalidation, re-attestation and recredentialing dates.

Credentialing vs enrollment vs privileging

These terms are often used as if they mean the same thing, but they describe different steps. Knowing the difference helps you see why a provider can be approved by a plan and still not be able to bill it.

Term	What it means	Who does it
Credentialing	Verifying a provider's education, training, licenses, board status, malpractice history and work history, usually from primary sources	Health plans, credentials verification organizations, hospitals
Enrollment (contracting)	Loading the provider into a payer's network and claims system under a contract, with an effective date and provider ID	Health plans and government programs such as Medicare and Medicaid
Privileging	Granting permission to perform specific procedures or admit patients at a particular hospital or surgery center	The facility's medical staff office

In practice, credentialing vs enrollment matters most for billing. A credentialing committee approval is not the same as a loaded contract, and claims sent before the payer shows you as active under the right tax ID are usually denied. Credentialing vs privileging matters if you also operate in a hospital or surgery center, where privileges are granted separately from any insurance network.

Step 1: NPI registration and taxonomy

How to apply for an NPI number

The National Provider Identifier is issued free by CMS through the National Plan and Provider Enumeration System (NPPES). NPI registration is done online with an NPPES account. You enter your legal name, Social Security number or the organization's tax ID, practice location, mailing address, license details and at least one taxonomy code. Organizations designate an authorized official who certifies the application.

Type 1 vs Type 2 NPI

NPI type	Who gets one	Where it appears on claims
Type 1 (individual)	Each individual clinician. It stays with the person for life, across employers and states.	Rendering provider, and billing provider for a sole proprietor billing under their own name
Type 2 (organization)	Group practices, clinics, incorporated entities and facilities	Billing provider for the group, with each clinician's Type 1 NPI as rendering provider

A clinician who forms a professional corporation or LLC and bills under that entity's tax ID usually needs a Type 2 NPI for the entity as well as a personal Type 1 NPI.

How to choose a taxonomy code

A taxonomy code describes your provider type and specialty. The code set is maintained by the National Uniform Claim Committee (NUCC), and CMS publishes a taxonomy code lookup page that maps codes to Medicare specialties. Choose the code that matches your license and the services you actually provide, list it as primary in NPPES, and use the same code on payer applications. Some payers also require the taxonomy on claims, and a mismatch between NPPES, the payer file and the claim is a common cause of rejections.

Step 2: CAQH profile setup and attestation

Most commercial plans and many Medicaid managed care plans gather credentialing data through CAQH ProView, a free online profile for providers. You enter your information once and authorize each plan to view it, instead of filling in a full paper application for every payer.

How to get a CAQH number

A CAQH provider ID is created when you self-register on ProView or when a participating health plan adds you to its roster and sends you a welcome message. Once you have the ID, you complete the profile, upload documents and give plans permission to access it.

What CAQH profile setup involves

• Personal and professional details: licenses, DEA, board certification, education, training and hospital affiliations.
• Work history with explanations for any gaps, as plans commonly ask about them.
• Practice locations, hours, telehealth details and languages offered.
• Current malpractice insurance certificate and claims history.
• Signed authorization and release forms.

CAQH attestation is the step where you confirm the profile is accurate. CAQH prompts providers to re-attest every 120 days, and plans may treat a profile with a lapsed attestation or expired document as incomplete. For CAQH ProView help with a locked account or a document error, the CAQH provider help desk is the right contact, since health plans cannot edit your profile.

Step 3: Medicare enrollment for providers through PECOS

Medicare enrollment for providers is separate from CAQH. CMS handles it through the Provider Enrollment, Chain, and Ownership System (PECOS) or paper CMS-855 forms, and each application is processed by the Medicare Administrative Contractor (MAC) for your state. PECOS enrollment is usually faster to track and easier to correct than paper.

Form	Used for
CMS-855I	Individual physicians and non-physician practitioners enrolling or updating their own enrollment
CMS-855B	Clinics, group practices and certain other suppliers enrolling as an organization
CMS-855R (now merged into CMS-855I)	Reassigning an individual's Medicare benefits to a group; CMS has merged the reassignment form into the consolidated CMS-855I
CMS-588	Electronic funds transfer (EFT) authorization for Medicare payments

A group practice typically files a CMS 855B for the organization, a CMS 855I for each clinician and a reassignment so payments go to the group. CMS charges an application fee to institutional providers, with the amount set each year in the Federal Register. Physicians, non-physician practitioners and their group practices are generally exempt, but confirm with CMS for your provider type.

Under federal rules, the effective date for physicians and practitioners is generally the later of the date the MAC receives an application it approves or the date you began furnishing services at the location. Medicare may allow billing for services up to 30 days before that date when circumstances prevented earlier enrollment. Opting out of Medicare is a separate process with its own affidavit.

Once Medicare approves the enrollment, the Medicare Administrative Contractor issues a PTAN (Provider Transaction Access Number). Claims are billed with the NPI, but the PTAN is often needed to set up portal access, check claim status and complete EFT and other contractor forms, so record it with the approval letter.

Step 4: Medicaid enrollment for providers

Each state runs its own Medicaid enrollment, and many states require Medicaid enrollment before a managed care plan will credential you. Medicaid enrollment for providers usually asks for the same license, NPI, ownership and disclosure information as Medicare, plus state-specific forms and screening.

In Texas, providers enroll through the Texas Medicaid & Healthcare Partnership (TMHP) using the Provider Enrollment and Management System (PEMS), and then credential separately with each Medicaid managed care organization they want to join. Our Texas Medicaid billing guide covers the STAR programs, MCO billing and filing deadlines in more detail.

Step 5: How to get on insurance panels with commercial and Medicare Advantage plans

Learning how to get on insurance panels is mostly about sequencing and persistence. Start with the plans most of your patients carry, confirm the panel is open for your specialty and area, and submit a complete application with your CAQH profile attested. If a panel is closed, ask whether there is a waiting list and explain any network gap you fill, such as a language, a subspecialty or evening hours.

Payer	What to check before applying
Aetna	Aetna credentialing generally relies on CAQH data. Confirm whether the plan or a behavioral health or therapy vendor manages your specialty.
Cigna	Cigna credentialing often runs separately for medical and behavioral health networks, so apply to the right one for your license.
UnitedHealthcare	United Healthcare credentialing is usually started through the payer's provider portal, and some products use separate networks or vendors.
Blue Cross Blue Shield of Texas	BCBS Texas credentialing covers commercial, Medicare Advantage and Medicaid products, and each may need separate participation.

Medicare Advantage credentialing is its own process. Enrollment in Original Medicare does not place you in a Medicare Advantage plan's network, and each plan credentials and contracts with providers separately. Without a contract, you may be treated as out of network for that plan's members.

Group credentialing

Group credentialing links each clinician to the group's contract and tax ID. A group contract does not automatically cover a new hire: most plans need an individual application or roster update for each clinician, and the group should hold that clinician's claims until the payer confirms an effective date under the group.

Two terms come up often at this stage. Panel status is whether a plan's network is open to new providers of your type in your area, and whether a given provider is already listed as participating; check it before you apply and again before you schedule patients. Delegated credentialing is an arrangement in which a plan lets a large group or health system credential its own providers to the plan's standards, which can shorten adding new clinicians but is usually available only to organizations that meet the plan's size and audit requirements.

Step 6: Contracts, effective dates and EFT/ERA enrollment

Approval is followed by a contract or participation agreement. Before signing, review the fee schedule, timely filing limit, termination terms and which products the agreement covers. After signing, record the effective date, your payer provider ID and the products you are in network for, and load these into your practice management system.

EFT ERA enrollment comes next. Electronic funds transfer sends payment to your bank account, and the electronic remittance advice (the 835 transaction) shows how each claim was paid or denied. Medicare uses the CMS-588 form for EFT, and most commercial plans and clearinghouses have their own enrollment steps. Make sure the ERA routes to the system where your team posts payments.

Step 7: Recredentialing, Medicare revalidation and upkeep

Credentialing is ongoing. Health plans run recredentialing on a cycle, commonly every three years under accreditation standards, and will ask you to confirm or update information. Medicare revalidation is required for most providers every five years, and CMS posts revalidation due dates. Texas Medicaid and other state programs also require periodic revalidation.

• Re-attest CAQH when prompted and upload renewed licenses and malpractice certificates before they expire.
• Report address, ownership, tax ID or group changes to every payer within its deadline.
• End Medicare reassignments and notify payers when a clinician leaves.
• Keep one calendar of license, DEA, board, CAQH, revalidation and recredentialing dates.

Timelines and costs at a glance

How long does credentialing take? It depends on the payer, your provider type, application completeness and whether the panel is open. Medicare and commercial plans each set their own processing times, and missing documents can restart a review. Our article on credentialing timelines breaks this down by payer type.

Cost is mainly staff time and any vendor fees, since the NPI and CAQH profile are free and most individual practitioners pay no Medicare application fee. See what credentialing costs for the factors that drive the price.

Getting help with credentialing

Some practices keep credentialing in-house; others hand it to a credentialing and enrollment service so applications are tracked to approval and dates are not missed. Fastora runs credentialing through a tracked nine-stage process, from consultation and document collection to final approval and ready to bill, and offers a free billing assessment for practices that want a second look at their enrollment and claims setup.

What is credentialing in medical billing?

Credentialing in medical billing is the process of verifying a provider\u2019s qualifications — license, education, malpractice history, work history — and enrolling them with insurance payers so their claims pay. Without completed credentialing and an effective contract date, claims deny as provider-not-enrolled regardless of how clean the coding is.

Checklist

Print checklist

• Active license in every state where patients are located
• Type 1 NPI (and Type 2 for the group) with correct taxonomy in NPPES
• CAQH ProView profile complete, documents current and attested
• Medicare PECOS enrollment (CMS-855I, CMS-855B, reassignment) and CMS-588 EFT
• State Medicaid enrollment, then Medicaid managed care plans
• Commercial and Medicare Advantage applications with reference numbers logged
• Signed contracts, effective dates and payer IDs loaded in the PM system
• EFT and ERA enrollment for each payer
• Calendar for re-attestation, revalidation and recredentialing

Frequently asked questions