PECOS NPI Lookup: Verify Medicare Enrollment Status

Everything you need for a complete PECOS NPI lookup: what PECOS is and what it's used for, how to check enrollment status by NPI or name, what "PECOS certified" and "PECOS verified" mean, how PECOS compares to the NPI and to Medicaid, and where the free official CMS lookup tools live. Start a lookup above, or jump to any section.

What Is PECOS?

PECOS stands for the Provider Enrollment, Chain, and Ownership System. It is the official CMS (Centers for Medicare & Medicaid Services) database that records which healthcare providers and suppliers are actually enrolled to participate in Medicare. Where NPPES answers "who is this provider?", PECOS answers "can Medicare pay for what they do?"

PECOS Meaning and Full Name

The Provider Enrollment, Chain, and Ownership System name reflects what it tracks: the provider's enrollment application, the ownership and management structure behind a business (its "chain"), and every practice location tied to that enrollment. A PECOS NPI lookup is shorthand for confirming that enrollment record against a specific NPI.

Who Maintains PECOS

PECOS is built and maintained by CMS, the same federal agency that runs Medicare and Medicaid. It is a separate system from NPPES: NPPES is operated for HIPAA identifier purposes and is public and free to search by name or NPI, while PECOS enrollment data is not directly name- or NPI-searchable on a single public web form, which is exactly why this page exists, to walk through the correct free workflow.

PECOS Replaced a Paper-Based Enrollment Process

Before PECOS, Medicare enrollment ran almost entirely on paper CMS-855 forms mailed to a Medicare Administrative Contractor, with manual data entry and long processing delays on both sides. PECOS moved that same enrollment data into a structured electronic system, which is also why it can now support automated ordering/referring checks that a paper file never could. Understanding that history explains why PECOS still uses the same 855-series form numbers today, even though the process is now largely electronic.

What Is PECOS Used For?

The main use of PECOS is straightforward: it is the system of record CMS uses to decide whether a provider's Medicare claims and referrals should be paid at all.

PECOS Used for Medicare Billing

Any physician, practitioner, group practice, hospital, or supplier that wants to bill Medicare directly must first complete enrollment in PECOS. Without an active PECOS enrollment tied to the provider's NPI, Medicare will reject claims outright, regardless of whether the service itself was medically appropriate.

PECOS Used for Ordering and Referring

PECOS is also used for providers who never submit a bill themselves. Since 2014, any physician or non-physician practitioner who orders or refers a Medicare-covered service, a lab test, imaging study, DME item, or specialist referral, must have an active PECOS enrollment, or the downstream claim from the billing provider can be denied. This is the single most common reason PECOS lookups get run in healthcare settings.

PECOS Used for Ownership and Reassignment Tracking

The "Chain and Ownership" half of the PECOS name is not decorative. CMS uses PECOS to track which individuals and organizations own or manage a given provider, and to record reassignment of benefits, the formal process by which an individual practitioner authorizes a group practice or facility to bill Medicare and collect payment on their behalf. A physician can be personally enrolled in PECOS while also having one or more active reassignments to different employers, all tracked in the same record.

How to Do a PECOS Lookup by NPI

The fastest, free path to a reliable PECOS lookup by NPI runs through NPPES identity first, then a CMS enrollment source second, because PECOS itself was never built as a public single-record search page.

Step-by-Step PECOS Lookup by NPI

• Step 1: Enter the provider's NPI (or name and state) in the search above to confirm their legal name, specialty, and practice address from NPPES.
• Step 2: Take that confirmed NPI to the CMS Medicare Ordering & Referring file, a free, regularly updated public dataset that lists every NPI currently eligible to order and refer Medicare services.
• Step 3: For billing-provider enrollment status specifically, cross-check the NPI on Medicare Care Compare (data.cms.gov/provider-data), which surfaces enrolled individual and organizational providers.
• Step 4: For a definitive, transaction-level answer, an authorized user can log into the PECOS Web Portal directly.

What You Need Before You Start

Have the provider's NPI number, full legal name, and practice state ready. Common names benefit from adding a city or specialty, exactly as with any NPI number lookup, since a mismatched identity is the most common reason a PECOS check fails at the first step.

Free PECOS Lookup Online

Every resource in this workflow, NPPES, the Ordering & Referring file, and Medicare Care Compare, is free and requires no account. A free PECOS lookup online is entirely possible; it just takes two systems instead of one, because PECOS enrollment data and NPPES identity data are maintained separately by design.

Reading Your PECOS Lookup Results

Once you have matched the NPI against the Ordering & Referring file or Medicare Care Compare, the fields that matter are the provider's enrollment status (present or absent from the active file), their enrollment specialty, and, on Medicare Care Compare, their listed practice locations. A provider missing from the Ordering & Referring file is not automatically barred from Medicare, it may simply mean they are enrolled to bill directly but were never required to be on the ordering/referring list, so cross-check both sources before concluding a provider is not enrolled at all.

PECOS Lookup by Name

Not every credentialing or billing scenario starts with a known NPI. A PECOS lookup by name is common when a claim or referral only lists the provider's name, or when confirming a new hire's Medicare status before their first day.

Search the provider's last name and state above to retrieve their NPI and full NPPES identity first. That NPI is then what you carry into the Medicare Ordering & Referring file or Medicare Care Compare, both of which are built around the NPI rather than free-text name matching.

Limitations of a PECOS Name Search

Common surnames, recent name changes, and providers with multiple practice locations all make a name-only search unreliable on its own. Confirming the NPI first, then using it for the PECOS-side check, is what actually produces an accurate result.

Adding a city, specialty, or organization name to the initial NPPES search narrows a common-surname result down to the correct individual before you move on to the enrollment check. Skipping this step is the most common cause of confirming the wrong provider's PECOS status entirely.

PECOS Lookup by NPI Login vs Public Lookup

A frequent point of confusion is the difference between publicly checking a provider's enrollment status and logging into PECOS as an authorized user. They serve different people and different purposes.

PECOS Lookup by NPI Login (Provider Portal Access)

The PECOS Web Portal requires a login, either an Identity & Access (I&A) account for the provider themselves, or delegated/authorized-official access for practice managers and credentialing staff. Portal access shows the full enrollment record: application status, revalidation due dates, reassignment of benefits, and practice locations. This login-based access is meant for the provider or their authorized representative, not for a member of the public checking another provider's status.

PECOS Lookup by NPI App and Mobile Access

CMS does not currently offer a dedicated mobile app for public PECOS lookups. The Medicare Ordering & Referring file and Medicare Care Compare are both browser-based and mobile-friendly, so a PECOS lookup by NPI works fine from a phone browser, but there is no standalone "PECOS app" to install, and any listing claiming otherwise should be treated with caution.

How to Check If a Physician Is PECOS Certified

"PECOS certified" is common shorthand for "actively enrolled in PECOS," not a separate credential or exam. Checking it is a matter of confirming enrollment status, not verifying a certificate.

What "PECOS Certified" Actually Means

There is no distinct PECOS certification exam or license. When people ask how to check if a physician is PECOS certified, they mean: does this physician have an active Medicare enrollment record that allows their orders, referrals, or claims to be honored. That status is binary, active or not, rather than a graded credential.

Step-by-Step PECOS Certification Check

• Confirm the physician's NPI and legal name here through NPPES.
• Search that NPI in the CMS Medicare Ordering & Referring file to confirm active status for ordering and referring.
• Cross-check Medicare Care Compare for billing-provider enrollment specifically.
• For an authoritative, real-time answer, the practice's billing office or credentialing team can confirm status directly through the PECOS Web Portal.

PECOS Certification vs State Medical License

A state medical license authorizes a physician to practice medicine in that state. PECOS enrollment is a completely separate, federal Medicare-participation status. A physician can be fully licensed and in good standing with their state board while still lacking active PECOS enrollment, and vice versa during a lapse or revalidation gap. Verifying both, license and PECOS status, independently is standard practice for any organization onboarding a new physician who will treat Medicare patients.

What Does "PECOS Verified" Mean?

PECOS verified generally means a provider's Medicare enrollment record has been confirmed as active and in good standing, as opposed to lapsed, deactivated, or never filed.

PECOS Verified vs PECOS Enrolled

"Enrolled" describes the underlying record existing in the system at all. "Verified" describes the act of confirming, at a specific point in time, that the enrollment is currently active and error-free. A provider can technically have a PECOS record on file while not being considered "verified" for a given payer or health system if their revalidation has lapsed or their information is outdated. Insurers, hospitals, and credentialing platforms use "PECOS verified" as their internal shorthand for a passed enrollment check, which is why the exact language varies slightly between organizations even though the underlying source, PECOS, is the same.

PECOS vs NPI: Critical Differences

Why Having an NPI Does Not Mean PECOS Enrollment

An NPI number lookup confirms identity, nothing more. NPPES assigns NPIs broadly to satisfy HIPAA transaction requirements, including to providers who never bill Medicare at all. A valid, active NPI says nothing about whether that same provider has completed, or maintained, Medicare enrollment. Assuming otherwise is the single most common credentialing mistake tied to PECOS.

What NPPES Shows vs What PECOS Shows

NPPES shows legal name, taxonomy, practice address, and state license number. PECOS shows Medicare enrollment type, reassignment of benefits, revalidation due date, and ordering/referring eligibility. A complete provider verification checks both, since neither system alone answers every credentialing question.

A Practical Example

Consider a newly hired nurse practitioner with a freshly issued NPI. Her NPPES record is complete the same week, name, taxonomy, and practice address all show up in a standard NPI lookup. Her PECOS enrollment, however, can take 60 to 90 days to process. During that gap, she can be found instantly here, but any Medicare claims billed under her NPI, or referrals she makes for Medicare patients, may be denied until her PECOS enrollment is approved. This exact scenario is why practices run a PECOS check, not just an NPI check, before a new clinician starts seeing Medicare patients.

PECOS Enrollment Types and Provider Categories

PECOS enrollment is not one-size-fits-all. The application form and review process differ by provider category.

Individual Practitioner Enrollment (Form 855I)

Physicians, nurse practitioners, physician assistants, and other individual eligible providers enroll using CMS Form 855I. This is the standard path for a solo or employed clinician seeking to bill Medicare directly under their own NPI.

Group, Facility, and Ordering/Referring Enrollment (855B / 855O)

Group practices, hospitals, and other organizational suppliers enroll using Form 855B, tied to the organization's own Type 2 NPI. Providers who only order or refer services, without billing Medicare directly, use the shorter Form 855O. Reviewers apply different documentation and timeline requirements to each category, and individual practitioner applications typically take 60 to 90 days to process.

Suppliers and DMEPOS Enrollment (855S)

Suppliers of durable medical equipment, prosthetics, orthotics, and supplies (DMEPOS) enroll separately using Form 855S, which carries its own accreditation and surety bond requirements on top of the standard PECOS application. A pharmacy or equipment supplier billing Medicare Part B for DMEPOS items is verified against this category, distinct from a physician or group practice enrollment.

PECOS for Medicare Billing, Ordering, and Referring

PECOS enrollment status directly determines whether Medicare pays a claim, which is why this section matters most for billing teams running a Medicare PECOS lookup before a claim goes out.

Billing Provider Enrollment Requirements

Before submitting a claim, confirm that the billing provider's PECOS enrollment is active and that the NPI on the claim matches the enrolled entity, individual or organizational. A claim submitted under a lapsed or mismatched enrollment is denied regardless of whether the service was covered.

The ACA Ordering and Referring Rule

Under Affordable Care Act rules effective since 2014, Medicare will not pay claims for services ordered or referred by a provider who lacks active PECOS enrollment, even when the rendering provider who performed the service is fully enrolled. This catches many organizations off guard, since it applies to hospital-based physicians and specialists who never personally submit a Medicare claim.

PECOS Revalidation and Enrollment Status

PECOS enrollment is not permanent. Confirming current status, not just historical enrollment, is part of any thorough PECOS lookup.

Revalidation Cycle and Deadlines

Most Medicare providers must revalidate their PECOS enrollment every five years; certain higher-risk supplier types revalidate every three years. CMS mails revalidation notices to the address on file in PECOS, which is why keeping contact information current is a routine part of Medicare compliance.

Active, Deactivated, and Revoked Status

• Active: enrollment is current; billing, ordering, and referring are all authorized.
• Deactivated: usually caused by a missed revalidation deadline; billing privileges pause until reactivation is processed.
• Revoked: a more serious enforcement action by CMS, typically tied to compliance issues, which can carry a re-enrollment bar.

A deactivated provider can generally reapply for reactivation, but there is often a real gap in billing ability while the application is processed, which is exactly why proactive PECOS lookups before claim submission save organizations from denials.

Why Revalidation Exists

Revalidation gives CMS a recurring checkpoint to confirm that a provider's practice address, ownership structure, and licensure information are still accurate, and to remove providers who have retired, relocated without updating their record, or otherwise stopped participating in Medicare. From a lookup perspective, this means an enrollment that was active last year is not guaranteed to still be active today, which is exactly why time-sensitive credentialing and billing decisions should verify current status rather than relying on a prior check.

Free PECOS Lookup Tools and Resources

Every legitimate free PECOS lookup resource is published directly by CMS. Third-party tools that claim to show live PECOS status are, at best, repackaging one of these same sources.

CMS Medicare Ordering & Referring File

This is the most direct free resource for confirming ordering and referring eligibility by NPI. CMS updates it regularly and publishes it as an open dataset at data.cms.gov, searchable and downloadable at no cost.

PECOS Lookup Tool for Batch and Bulk Verification

Organizations verifying many providers at once, health systems, payers, credentialing vendors, typically download the full Ordering & Referring file or the broader Medicare enrollment dataset from data.cms.gov and match it against their own NPI roster, rather than checking one record at a time through a browser.

PECOS Web Portal for Authorized Users

Providers, office managers, and authorized officials can log into the PECOS Web Portal directly using an Identity & Access (I&A) account to view or update an enrollment record in real time. This is the same portal used to submit new enrollment applications, track revalidation deadlines, and manage reassignment of benefits, and it is the most authoritative source available, though it requires an authorized login rather than being open to the public.

PECOS Lookup by NPI for Credentialing Teams

Hospital credentialing offices and payer enrollment teams treat a PECOS lookup by NPI as a required primary-source verification step, alongside NPI, DEA, and state license checks.

Building PECOS Checks Into Onboarding

Confirming PECOS status during onboarding, and again at each revalidation cycle, prevents a common and costly failure pattern: a new hire starts seeing Medicare patients before their enrollment is active, and every claim for those early weeks is denied. Building a PECOS check into the same workflow as the NPI and DEA verification closes that gap before it costs the organization revenue.

Documenting the Verification for Audits

Beyond the initial check, credentialing files should keep a dated record of each PECOS verification performed, not just the result but when it was checked. CMS audits and payer credentialing reviews frequently ask for evidence that enrollment status was confirmed at the time a provider began billing, and a simple timestamped screenshot or export from the Ordering & Referring file is usually sufficient documentation.

Is There a Separate PECOS Number?

People searching for a "PECOS number" are usually looking for one of two internal CMS identifiers, neither of which is publicly searchable the way an NPI is.

PECOS Associate Control ID (Individual Providers)

Individual providers who create a PECOS account are assigned an Associate Control ID, used internally to manage their enrollment record and any I&A system access. It is not used on claims and is not a public identifier.

PECOS Enrollment ID (Organizations)

Organizations and practices similarly receive an Enrollment ID tied to their PECOS record. Like the Associate Control ID, this is an internal CMS tracking number, not a replacement for the NPI, and it does not appear on Medicare claims.

PECOS and Medicaid: What Is the Difference?

PECOS covers Medicare enrollment only. This is one of the most common points of confusion in a PECOS lookup.

Why PECOS Enrollment Does Not Cover Medicaid

Medicaid enrollment is managed separately by each state's Medicaid agency, with its own application, timeline, and revalidation rules. Some states cross-reference PECOS data to streamline their own Medicaid provider verification, but the systems remain independent. A provider billing both Medicare and Medicaid, common for dual-eligible patients, must maintain active enrollment in both systems separately; PECOS status alone never confirms Medicaid participation.

Dual-Eligible Billing and Two Separate Checks

For patients covered by both Medicare and Medicaid, the billing provider's claim may route through both systems depending on the service, which means a complete verification checks PECOS status for the Medicare side and the relevant state Medicaid portal for the Medicaid side. Skipping either check is a common source of denied dual-eligible claims, since an active PECOS enrollment says nothing about a provider's Medicaid standing in any given state.

PECOS Lookup by State and MAC Jurisdictions

Unlike a state medical license or a DEA registration, PECOS enrollment itself is not state-specific, but the Medicare Administrative Contractor (MAC) that processes a provider's enrollment and claims is tied to their practice location.

How Medicare Administrative Contractors Relate to PECOS

CMS divides the country into MAC jurisdictions (Novitas, CGS, WPS, Noridian, and others), each processing Part A/B enrollment and claims for its region. A provider's PECOS enrollment application is routed to and reviewed by the MAC for their practice state, so a "PECOS lookup by state" in practice means confirming the provider's practice location here, then knowing which MAC handles their Medicare enrollment and billing.

This also matters for providers who relocate. Moving a practice from one MAC jurisdiction to another requires updating the PECOS enrollment record with the new practice address, and, in some cases, a new enrollment review by the receiving MAC. A provider whose NPPES address has been updated but whose PECOS record still shows the old location and MAC is a common, and easily missed, source of mismatched verification results.

Common Reasons a Provider Is Not Found in PECOS

Most failed PECOS checks trace back to one of a small number of causes, worth ruling out before assuming a provider was never enrolled.

Provider Never Enrolled or Enrollment Lapsed

Some providers, particularly those who only work in cash-pay or non-Medicare settings, simply never enrolled in PECOS, which is expected and not an error. Others enrolled previously but missed a revalidation deadline, causing a deactivation that will not appear until reactivation is processed.

Name or NPI Mismatch

A mismatch between the name on file in NPPES and the name on the PECOS enrollment, common after a legal name change, can cause a lookup to come back empty even though an active enrollment exists. Confirming the NPI first, rather than relying on name alone, avoids this failure mode.

When to Escalate to the MAC

If a provider's NPPES identity is confirmed but they still cannot be found in either CMS enrollment resource, and the provider insists their enrollment is active, the next step is contacting their Medicare Administrative Contractor directly, since the MAC processes the underlying enrollment and can see application status that public datasets do not always reflect immediately.

Who Uses PECOS Verification?

PECOS verification is a routine, recurring task across several distinct healthcare functions, not a one-time check.

Hospitals, Health Systems, and Billing Teams

Hospital credentialing offices confirm PECOS status during onboarding and revalidation cycles for every provider on staff. Billing and revenue-cycle teams check it proactively before submitting claims for new or recently transferred providers, to avoid denials tied to lapsed enrollment.

Telehealth and Multi-State Providers

Telehealth organizations and providers practicing across state lines rely on PECOS verification alongside NPI and state license checks, since Medicare coverage for a remote visit still depends on the ordering or rendering provider's active PECOS enrollment, regardless of where the patient is physically located.

Payers and Credentialing Platforms

Commercial insurers and third-party credentialing platforms, including CAQH-based systems, frequently cross-check PECOS enrollment as part of their own provider network verification, even though PECOS itself is a Medicare-specific system. An active PECOS enrollment is often treated as a positive signal of a provider's overall standing during commercial payer credentialing, alongside the NPI, DEA, and state license checks covered on our other lookup tools.

History and Regulatory Background of PECOS

Understanding why PECOS exists explains why it is structured, and verified, the way it is today.

Why CMS Built PECOS

CMS built PECOS to modernize and centralize Medicare provider enrollment, replacing a slower, paper-based system with an electronic record CMS could audit, cross-reference for fraud, and use to track ownership relationships between providers and the organizations billing on their behalf.

The Affordable Care Act and PECOS

The Affordable Care Act significantly raised the stakes for PECOS enrollment by introducing the ordering/referring requirement in 2014, extending PECOS's importance well beyond providers who bill Medicare directly, and making a PECOS lookup a routine step for far more of the healthcare workforce than before.

PECOS Today

PECOS now underpins nearly every Medicare compliance and revenue-cycle workflow in US healthcare, from a solo practitioner's first enrollment application to a national health system's automated batch verification of thousands of providers. As telehealth, multi-state practice, and value-based care arrangements have grown, so has the practical importance of confirming PECOS status quickly and correctly, which is exactly the gap this page is written to close.

Glossary of PECOS and Medicare Enrollment Terms

Frequently Asked Questions

Common questions about PECOS NPI lookup, PECOS certification, PECOS verified status, and how PECOS relates to Medicare, Medicaid, and the NPI. Click any question to expand it.

What is PECOS for NPI?

PECOS is the CMS Medicare enrollment system, separate from the NPPES database that issues NPI numbers. A PECOS-for-NPI lookup means confirming a provider's identity by NPI in NPPES first, then checking whether that same NPI is actively enrolled with Medicare through PECOS-sourced CMS resources like the Ordering & Referring file.

What are PECOS used for in Medicare?

PECOS is used to authorize Medicare billing, and, since 2014, to authorize ordering and referring services for Medicare patients. A provider without active PECOS enrollment cannot have their Medicare claims paid, and services they order or refer may also be denied even if another enrolled provider rendered them.

How can I check if a physician is PECOS certified?

Confirm the physician's NPI and identity through NPPES, then check that NPI against the CMS Medicare Ordering & Referring file or Medicare Care Compare to confirm active enrollment status. There is no separate PECOS certification exam; 'PECOS certified' simply means actively enrolled.

What does "PECOS verified" mean?

PECOS verified means a provider's Medicare enrollment has been confirmed as active and in good standing at a specific point in time, as opposed to lapsed, deactivated, or never enrolled. Different organizations use this phrase as shorthand for a passed PECOS enrollment check.

What is the main use of PECOS?

The main use of PECOS is determining whether Medicare can pay a provider's claims and honor the referrals and orders they make. It is CMS's authoritative record of Medicare provider and supplier enrollment.

What are PECOS used for in healthcare?

In healthcare broadly, PECOS is used by billing teams to confirm claims will be paid, by credentialing offices to verify new hires before they see Medicare patients, and by hospitals to ensure referring physicians maintain active enrollment so downstream Medicare-covered services are not denied.

How do I do a PECOS lookup by NPI?

Enter the provider's NPI above to confirm their identity and specialty from NPPES, then check that NPI against the CMS Medicare Ordering & Referring file for ordering/referring status, or Medicare Care Compare for billing enrollment. For a definitive record, an authorized user can log into the PECOS Web Portal directly.

Is there a free PECOS lookup online?

Yes. NPPES, the CMS Medicare Ordering & Referring file, and Medicare Care Compare are all free, official CMS resources that require no account. Together they support a complete PECOS NPI lookup at no cost.

Can a provider have an NPI but not be in PECOS?

Yes. An NPI is assigned broadly for HIPAA transaction purposes and does not require Medicare enrollment. A provider can have an active NPI in NPPES while not being enrolled in PECOS, meaning they cannot bill Medicare or have Medicare claims accepted for their referrals.

How long does PECOS enrollment take?

Individual practitioner PECOS enrollment (Form 855I) typically takes 60 to 90 days to process. Group and organizational enrollment (Form 855B) can take longer. Providers should apply well ahead of their intended Medicare billing start date.

What happens if a provider's PECOS enrollment lapses?

If PECOS enrollment lapses or is deactivated, commonly from a missed revalidation deadline, Medicare will deny claims submitted under that provider's NPI, and services they order or refer may also be denied. The provider must submit a reactivation application, and there is often a real gap in billing ability while it processes.

Does this tool show PECOS enrollment status directly?

No. This tool shows NPPES identity data, name, NPI, specialty, and address, as the first verification step. For actual PECOS enrollment status, use the CMS Medicare Ordering & Referring file, Medicare Care Compare, or the PECOS Web Portal.

Is PECOS enrollment required for Medicaid?

No. PECOS covers Medicare enrollment only. Medicaid enrollment is managed separately by each state's Medicaid program. Providers billing both Medicare and Medicaid must maintain active enrollment in both systems independently.

What is a PECOS enrolled provider?

A PECOS enrolled provider is one whose Medicare enrollment application has been approved by CMS and is currently active, authorizing them to bill Medicare directly and, where applicable, to order or refer Medicare-covered services.

Is this tool affiliated with CMS or Medicare?

No. This is an independent tool that uses the public CMS NPPES API. It is not affiliated with, endorsed by, or connected to CMS, Medicare, HHS, or any US government agency. For authoritative PECOS enrollment status, always confirm through official CMS resources.

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