Credentialing Glossary

CAQH (Council for Affordable Quality Healthcare)

CAQH is the nonprofit alliance of health plans and trade associations that built a shared, standardized system for collecting provider data. Instead of filling out a separate application for every insurance company, a provider completes one CAQH profile that participating payers can pull from during credentialing.

For a practice owner, CAQH is the foundation everything else is built on. A profile that is incomplete, expired, or missing an attestation is the single most common reason a credentialing application stalls with a payer, which is why keeping it current is one of the first things an RCM team checks.

CAQH ProView

CAQH ProView is the online portal providers use to build and maintain their CAQH profile: demographics, education, work history, malpractice coverage, licenses, and more. It replaced CAQH’s older paper-based process and is now the primary system payers reference nationwide.

Providers must re-attest to their ProView data every 120 days, even if nothing has changed. Missing that window can quietly pause credentialing or re-credentialing with every payer connected to the profile, so proactive monitoring matters as much as the initial setup.

Provider Credentialing

Provider credentialing is the process of verifying a clinician’s education, training, licensure, work history, and malpractice record before a health plan or hospital allows them to treat patients under that network. It exists to protect patients and confirm a provider is who they claim to be, qualified to practice.

Credentialing is distinct from enrollment: credentialing checks who a provider is, while enrollment sets up the business relationship to bill and get paid. Practices often use both terms interchangeably, but a strong RCM partner treats them as separate steps that must both be completed correctly.

Provider Enrollment

Provider enrollment is the administrative process of registering a clinician or practice with a specific payer, Medicare, or Medicaid so that claims can be submitted and reimbursed under that provider’s name. It happens after credentialing confirms the provider meets the payer’s qualification standards.

Enrollment applications require accurate tax ID, NPI, and banking information, and even small mismatches between what’s on file with CAQH, the state license board, and the payer can trigger a rejection. A single enrollment error can delay a provider’s ability to bill for months.

Payer Enrollment

Payer enrollment refers specifically to the process of enrolling a provider with commercial insurance companies, such as Aetna, Cigna, or UnitedHealthcare, as opposed to government programs like Medicare or Medicaid. Each payer has its own application, timeline, and documentation requirements.

Because commercial payers often move slower than government programs and rarely offer a single unified system, practices juggling multiple payer relationships benefit from a dedicated team tracking every application’s status, follow-up requirements, and effective date.

PECOS (Provider Enrollment, Chain, and Ownership System)

PECOS is the CMS online system providers and practices use to enroll in Medicare, update enrollment information, and revalidate existing enrollment. It replaced the older paper CMS-855 submission process for most enrollment types.

A provider’s PECOS status directly affects whether Medicare claims can be paid, and errors like an outdated address or an unresolved revalidation request are common causes of unexpected Medicare payment holds. Keeping PECOS current is a routine but essential part of ongoing revenue cycle management.

NPI (National Provider Identifier)

An NPI is the 10-digit identification number the federal government assigns to healthcare providers and organizations, used on every claim submitted to a payer. There are two types: an individual (Type 1) NPI for a single clinician, and an organizational (Type 2) NPI for a practice, group, or facility.

Claims are frequently denied when the individual and organizational NPI on file don’t match what’s registered with a payer or CAQH. Getting NPI details right and keeping them synced across every system is a small detail with an outsized impact on clean claim rates.

CMS-855 Enrollment Forms

The CMS-855 forms are the Medicare enrollment applications providers and suppliers use to enroll, add practice locations, or update information within PECOS or by paper. Different versions apply to different provider types: 855I for individual practitioners, 855B for clinics and group practices, 855A for institutional providers, 855R for reassignment of benefits, and 855S for suppliers.

Choosing the wrong form, or leaving reassignment paperwork incomplete, is a frequent reason Medicare enrollment applications are returned for correction. Practices adding a new physician or opening a new location need to know exactly which 855 variant applies to avoid a billing delay.

Delegated Credentialing

Delegated credentialing is an arrangement in which a health plan formally authorizes a practice, hospital, or credentialing organization to perform credentialing on its behalf, rather than the payer verifying every provider itself. The delegated entity still follows the payer’s standards and reports results back on an agreed schedule.

For larger practices or groups adding providers regularly, a delegated credentialing agreement can dramatically shorten the time it takes a new hire to start seeing patients under a payer’s network, since the payer doesn’t have to independently verify each file from scratch.

Credentialing Verification Organization (CVO)

A CVO is a specialized organization that performs primary source verification of a provider’s credentials, such as confirming a medical license directly with the issuing board or verifying a residency directly with the training program, on behalf of a payer, hospital, or practice.

Using a CVO helps standardize credentialing quality and can speed up the verification portion of the process, but a practice still needs someone tracking the CVO’s output and making sure every payer application reflects the verified information accurately and on time.

Re-credentialing (Recredentialing)

Re-credentialing is the periodic review payers and hospitals conduct, typically every two to three years, to confirm a provider’s licensure, malpractice history, and qualifications are still current and in good standing. It’s a continuation of the original credentialing process rather than a one-time event.

Missing a re-credentialing deadline can result in a provider being quietly dropped from a payer’s network, which shows up later as a wave of unexpected claim denials. Tracking every provider’s re-credentialing cycle across every payer is one of the more overlooked parts of revenue cycle management.

Medicare Revalidation

Medicare revalidation is the requirement that enrolled providers periodically confirm and update their enrollment information in PECOS, typically every five years (three years for durable medical equipment suppliers), to remain active in the program. CMS sends notice of the revalidation window, but the deadline is easy to miss.

Failing to revalidate on time can result in Medicare deactivating a provider’s billing privileges, which halts claim payments until enrollment is reinstated. Practices that track revalidation dates proactively avoid the cash flow disruption that comes from a lapsed Medicare enrollment.

EFT Enrollment (Electronic Funds Transfer)

EFT enrollment sets up direct deposit of insurance payments into a practice’s bank account instead of receiving paper checks. Most payers require a separate EFT enrollment application, often through a clearinghouse or a system like CAQH EnrollHub, in addition to standard provider enrollment.

Because EFT setup is tied to a specific tax ID and bank account, it has to be re-established any time a practice changes banks, adds a new tax ID, or brings on a new provider group. Skipping this step means payments default to paper checks, slowing down cash flow.

ERA Enrollment (Electronic Remittance Advice)

ERA enrollment authorizes a payer to send electronic remittance advice, the detailed explanation of how a claim was paid or denied, directly into a practice’s billing software instead of a mailed paper document. It typically goes hand in hand with EFT enrollment.

Practices without ERA enrolled often spend extra staff time manually posting payments from paper statements, which slows down reconciliation and makes it harder to spot underpayments or denials quickly. It’s a small setup step with a real efficiency payoff.

EDI Enrollment (Electronic Data Interchange)

EDI enrollment authorizes a practice’s clearinghouse or billing system to electronically submit claims and receive responses on behalf of the provider with a specific payer. It’s a separate authorization from provider or payer enrollment, and payers typically require it before electronic claims will be accepted.

Without completed EDI enrollment, claims may be rejected outright or forced into a slower paper submission process. It’s one of the technical steps that’s easy to overlook amid the larger credentialing and enrollment workload, but it directly affects how fast a practice gets paid.

Insurance Paneling

Insurance paneling, sometimes used interchangeably with payer enrollment, refers to the process of joining a health plan’s network of contracted, in-network providers. Being paneled means patients with that insurance can see the provider at in-network rates.

Paneling timelines vary widely by payer and can take anywhere from 30 to 150 days, so practices bringing on a new provider need to start the process well before that provider’s start date to avoid a gap where their services aren’t reimbursable at in-network rates.

Primary Source Verification

Primary source verification is the practice of confirming a provider’s credentials, such as a medical degree, board certification, or state license, directly with the institution or authority that issued them, rather than relying on a copy the provider submitted. It’s a core requirement of accredited credentialing.

This step exists to prevent fraud and confirm accuracy, and it’s often the most time-consuming part of credentialing since it depends on response times from medical schools, licensing boards, and previous employers outside the practice’s control.

Medicaid Provider Enrollment

Medicaid provider enrollment is the process of registering with a state Medicaid program (or a Medicaid managed care plan) to bill for services delivered to Medicaid beneficiaries. Because Medicaid is administered at the state level, requirements, portals, and timelines differ significantly from one state to the next.

Practices operating across state lines or treating Medicaid patients in a new location need to research that state’s specific enrollment system and documentation requirements, since assuming one state’s process will match another is a common source of delay.

Vendor Credentialing

Vendor credentialing is the process hospitals and health systems use to verify and approve outside representatives, such as medical device or pharmaceutical vendors, before granting them facility access. It’s a separate track from provider credentialing, typically managed through platforms like symplr or Vendormate.

While distinct from payer-facing provider credentialing, vendor credentialing shows up in the same broader compliance conversation practices have with hospital partners, and understanding both helps a practice speak knowledgeably about credentialing as a whole category.

In-Network Provider Status

In-network status means a provider has completed both credentialing and contracting with a specific health plan, allowing patients with that insurance to receive care at the negotiated, typically lower, cost-sharing rate. Out-of-network providers can still see those patients, but usually at a higher cost to the patient and less predictable reimbursement.

Reaching in-network status requires more than just being credentialed. It also requires an executed contract with negotiated rates, which is a separate step practices sometimes overlook when estimating how soon a new provider can start billing at in-network rates.

Credentialing Specialist

A credentialing specialist is the person (or team) responsible for managing a provider’s applications, tracking documentation, following up with payers, and keeping CAQH, PECOS, and payer-specific profiles current. The role requires close attention to detail and constant follow-up, since applications can sit in a payer’s queue for weeks without proactive outreach.

Many practices underestimate how much ongoing work credentialing requires after a provider’s initial approval, from re-attestations to re-credentialing cycles to demographic updates, which is why outsourcing this function to a dedicated RCM team is increasingly common.

Payer Credentialing (Health Plan Credentialing)

Payer credentialing refers to the specific credentialing standards and process each individual health plan, such as Aetna, Cigna, BCBS, or UnitedHealthcare, requires before adding a provider to its network. While CAQH standardizes the underlying data, each payer still reviews it against its own criteria and timeline.

Because payer credentialing committees typically meet on a set schedule, sometimes only monthly, a completed application can still sit for weeks waiting for committee review. Understanding each payer’s specific cadence helps set realistic expectations for when a new provider can begin seeing patients.

Provider Enrollment vs. Credentialing

Credentialing and enrollment are often used as if they’re the same thing, but they answer different questions. Credentialing verifies a provider is qualified to practice; enrollment establishes the administrative relationship that allows that provider to bill and be reimbursed by a specific payer or program.

A provider can be fully credentialed with a health plan and still be unable to bill if enrollment hasn’t been finalized, or vice versa in some payer workflows. Practices that understand this distinction are better equipped to diagnose exactly where a delay is happening and who needs to resolve it.

Group NPI vs. Individual NPI

An individual (Type 1) NPI identifies a single healthcare provider, while a group or organizational (Type 2) NPI identifies a practice, clinic, or facility as a billing entity. Claims typically require both: the individual NPI of the rendering provider and the group NPI of the billing organization.

Mismatches between these two numbers, or failing to link a new provider’s individual NPI to the correct group NPI with a payer, are a common and avoidable cause of claim denials when a practice adds a new clinician.

Credentialing Roster

A credentialing roster is the running list of every provider a practice needs credentialed or re-credentialed, along with each provider’s status, payer, submission dates, and upcoming deadlines. It’s the operational tool that keeps a multi-provider practice from losing track of where each application stands.

Practices that manage credentialing without a centralized roster often discover gaps only after a claim denial reveals a provider was never fully enrolled with a given payer, which is why maintaining an accurate, up-to-date roster is considered a foundational RCM practice.