> ## Documentation Index
> Fetch the complete documentation index at: https://mso.getlemma.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Payer enrollment & submission links
> Where to enroll: the federal systems, the shared credentialing infrastructure, national payer portals, and the state Medicaid index.
Master index of where to submit provider enrollment, credentialing, and EDI/ERA/EFT information.
**Link rot is this page's failure mode.** Payer portals move and get rebranded. Links checked August 2026; if one is dead, search the payer's provider site rather than assuming the program ended. Report broken links to [contact@getlemma.com](mailto:contact@getlemma.com).
## Start here, the federal and shared systems
| System | Purpose | Link |
| -------------------------------- | -------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------ |
| **NPPES** | Apply for and maintain NPIs (Type 1 and Type 2) | [nppes.cms.hhs.gov](https://nppes.cms.hhs.gov/) |
| **NPI Registry** | Look up an existing NPI, **check before creating a duplicate** | [npiregistry.cms.hhs.gov](https://npiregistry.cms.hhs.gov/) |
| **PECOS** | Medicare enrollment: CMS-855B, 855I, 855R, 588 | [pecos.cms.hhs.gov](https://pecos.cms.hhs.gov/) |
| **Medicare Revalidation Lookup** | **Check your revalidation date directly** | [data.cms.gov/tools/medicare-revalidation-list](https://data.cms.gov/tools/medicare-revalidation-list) |
| **CAQH ProView** | Credentialing profile most commercial payers pull from | [proview.caqh.org](https://proview.caqh.org/) |
| **CAQH** | EFT/ERA enrollment across participating payers | [caqh.org](https://www.caqh.org/) |
| **OIG LEIE** | Exclusion screening, **monthly** | [exclusions.oig.hhs.gov](https://exclusions.oig.hhs.gov/) |
| **SAM.gov** | Federal debarment screening | [sam.gov](https://sam.gov/) |
## The order of operations
Type 2 NPI for the PC (requires the EIN); confirm each clinician's existing Type 1.
Build or update the profile, upload documents, **authorize every target payer**, attest.
Medicare 855B, 855I per clinician, 855R reassignment, 588 for EFT.
Agency enrollment, **plus every managed care plan** in your service area.
Contract, then credential, then EDI/ERA/EFT.
## National commercial payers
| Payer | Provider site | Notes |
| ---------------------------- | ------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------- |
| **UnitedHealthcare** | [uhcprovider.com](https://www.uhcprovider.com/) | UnitedHealthcare Provider Portal (One Healthcare ID). Optum Pay for EFT/ERA. Behavioral often via Optum Behavioral Health. |
| **Elevance Health / Anthem** | [availity.com](https://www.availity.com/) | Provider transactions largely via Availity. **Note Elevance operates as the Blue licensee in many states**, enroll with the correct state entity. |
| **Aetna (CVS Health)** | [aetna.com/health-care-professionals](https://www.aetna.com/health-care-professionals.html) | Availity for many transactions. Separate dental network. |
| **Cigna** | [cignaforhcp.cigna.com](https://cignaforhcp.cigna.com/) | Evernorth for behavioral and pharmacy. |
| **Humana** | [humana.com/provider](https://www.humana.com/provider) | Availity for many transactions. Heavy Medicare Advantage concentration. |
| **Centene** | [centene.com](https://www.centene.com/) | Brands vary by state, Ambetter and state-specific Medicaid brands. **Enroll with the state plan, not the parent.** |
| **Molina** | [molinahealthcare.com](https://www.molinahealthcare.com/) | State-specific plans. |
| **Kaiser Permanente** | Region-specific | Closed model, outside contracting is limited and region-specific. |
## Blue Cross Blue Shield
**"BCBS" is roughly thirty independent licensee companies.** A contract with one is not a contract with another. Enroll with **the Blue licensee for your state**.
Find yours through the [BCBS Association](https://www.bcbs.com/) plan finder, then go to that company's own provider site.
**BlueCard** lets you bill your local Blue for an out-of-area Blue member — it handles travelling patients, not network participation where you have an office.
## Government programs
| Program | Where |
| ------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------- |
| **Medicare** | [PECOS](https://pecos.cms.hhs.gov/); find your MAC via [CMS](https://www.cms.gov/medicare/coding-billing/electronic-billing/find-your-mac-page) |
| **Medicaid** | Your state agency's provider portal, see below |
| **TRICARE** | Regional contractors: [TRICARE East](https://www.humanamilitary.com/) · [TRICARE West](https://www.tricare-west.com/) |
| **VA Community Care** | Optum (some regions) and TriWest (others), see [VA Community Care Network](https://www.va.gov/COMMUNITYCARE/providers/index.asp) |
| **FEHB** | Via the participating carriers |
| **Workers' compensation** | State-specific; check the state's workers' comp division |
## State Medicaid index
Each state runs its own enrollment portal. The reliable route:
[medicaid.gov/state-overviews](https://www.medicaid.gov/state-overviews/index.html) links to each state agency.
Naming varies enormously, "provider enrollment," "provider services," or a vendor-branded portal.
**State agency enrollment is necessary but rarely sufficient.** Most Medicaid beneficiaries are in managed care plans, and **each MCO requires its own contract and credentialing**. A state with five MCOs is six enrollments. See [Enroll in state Medicaid](/guides/enrollment/enroll-in-medicaid).
## Dental payers
| Payer | Notes |
| --------------------------- | ------------------------------------------------------------------------------------------ |
| **Delta Dental** | A federation of state member companies, **enroll with your state's Delta**, like the Blues |
| **MetLife Dental** | [metdental.com](https://www.metdental.com/) |
| **Guardian** | Separate dental network |
| **Cigna Dental** | Separate from Cigna medical |
| **Aetna Dental** | Separate from Aetna medical |
| **UnitedHealthcare Dental** | Separate network |
🦷 Dental credentialing is **separate** from medical, even at the same brand. A group operating both medical and dental entities runs two largely disjoint payer operations.
## Vision plans
| Payer | Notes |
| ------------------------------------- | -------------------------------------------------------- |
| **VSP** | [vsp.com](https://www.vsp.com/), the largest vision plan |
| **EyeMed** | [eyemed.com](https://www.eyemed.com/) |
| **Davis Vision**, **Superior Vision** | Regional and employer-based |
👁 Vision plans are separate from medical, with separate credentialing and frequently their own submission channels rather than standard clearinghouse routing. See [Optometry and vision](/concepts/industries/optometry).
## Behavioral health carve-outs
Many medical plans carve behavioral health out to a separate administrator requiring **separate contracting and credentialing**:
| Administrator | Parent |
| ----------------------------- | ------------------ |
| **Optum Behavioral Health** | UnitedHealth Group |
| **Carelon Behavioral Health** | Elevance |
| **Evernorth Behavioral** | Cigna |
| **Magellan Healthcare** | Centene |
🧠 Contracting with a medical plan does **not** get you into its behavioral network. Check for a carve-out on every payer. See [Behavioral health](/concepts/industries/behavioral-health).
## Clearinghouse payer lists, the canonical source for IDs
| Clearinghouse | Payer list |
| ------------------------- | ------------------------------------------------------------------------------------ |
| **Stedi** | [stedi.com/healthcare/network](https://www.stedi.com/healthcare/network), searchable |
| Optum / Change Healthcare | Via their provider resources |
| Availity | Via the Availity portal |
| Waystar | Via their payer list |
**Payer IDs are clearinghouse-specific**, and professional and institutional claims can have different IDs for the same payer. Always use **your** clearinghouse's list.
## What to record per payer per entity
Maintain in your enrollment grid:
| Field |
| ------------------------------------------------------------- |
| Entity, Tax ID, group NPI |
| Payer name and **payer ID at your clearinghouse** |
| Contract effective date |
| Provider effective date, per clinician |
| **Timely filing limit** |
| **Appeal deadline** |
| EDI status · ERA status and receiver · EFT status and account |
| Provider relations contact |
| Recredentialing / revalidation due date |
| Portal URL and credentials location |
## Related topics
- [Set up and maintain CAQH profiles](/guides/enrollment/set-up-caqh.md)
- [Enroll in Medicare (PECOS)](/guides/enrollment/enroll-in-medicare.md)
- [Enroll in state Medicaid](/guides/enrollment/enroll-in-medicaid.md)
- [Set up EDI, ERA, and EFT with each payer](/guides/enrollment/set-up-edi-era-eft.md)
- [How to use the payer reference](/reference/payers/overview.md)
- [Timely filing limits by payer](/reference/payers/timely-filing-limits.md)