> ## Documentation Index
> Fetch the complete documentation index at: https://docs.thrizer.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Register with Anthem Blue Cross in California

> Find Anthem California's out-of-network registration in Availity and register your practice separately from Blue Shield of California.

## Before you start

California practices using Thrizer for out-of-network BCBS claims must register separately with **Anthem Blue Cross** and **Blue Shield of California**. This guide covers Anthem. Complete the [Blue Shield of California registration](/help/claims/bcbs-blue-shield-ca-provider-registration) too; one registration does not cover both plans.

Registration establishes the provider information Anthem needs for claims processing. It is not the same as creating an Availity account, joining Anthem's network, or receiving claim approval.

The practice coordinates registration and supplies its clinicians' information. You need an Availity Essentials account associated with your organization and the **provider enrollment role** assigned by your organization's Availity administrator. Have your practice's TIN, applicable billing NPI, clinician NPIs, and service-location information ready.

## Open Anthem's out-of-network registration

These steps come from [Anthem California's official out-of-network registration instructions](https://providernews.anthem.com/california/articles/new-availity-essentials-features-for-outofnetwork-providers-29052). The screens after sign-in depend on your organization's access and Anthem's current application.

<Steps>
  <Step title="Sign in to Availity Essentials">
    Open [Availity Essentials](https://availity.com) and sign in. Select the California market where applicable. If your organization already has an account, ask its administrator for access instead of creating a duplicate organization.
  </Step>

  <Step title="Open Anthem's payer space">
    Select **Payer Spaces**, then **Anthem**.
  </Step>

  <Step title="Open the enrollment application">
    Under **Applications**, open **Provider Enrollment and Network Management**. Anthem's newer [September 2026 enrollment update](https://providernews.anthem.com/california/articles/professional-provider-enrollment-welcome-letters-added-to-av-31814) calls the application **Enrollment, Registration and Network Management**.
  </Step>

  <Step title="Choose the out-of-network option">
    Select **Out-of-Network / Single Case Agreements** to start registration. The combined menu name does not mean every practice must obtain a single-case agreement. Do not choose in-network participation as a substitute.
  </Step>

  <Step title="Complete the requested practice and clinician information">
    Register your practice or organization and provide the applicable clinician details requested by Anthem. A solo practitioner can use the individual-practitioner registration path. Clinicians within a group are not being instructed to establish separate practices.

    Review the current application's requirements and your information before submitting. Keep the application's confirmation and follow Anthem's requests for any missing information.
  </Step>
</Steps>

## If you cannot add your group's clinicians

Anthem's April 2026 article says non-participating organization roster submission was still being developed. Do not assume a roster-upload button is available. If the application does not provide a way to associate your clinicians, use **Chat with Payer** in Anthem's payer space or contact Anthem's provider support to confirm the required process.

## If you already have a record or cannot find the application

* **Updating demographics:** Anthem directs existing-record updates to **My Providers → Provider Data Management**. That is different from initial enrollment.
* **Enrollment application missing:** ask your Availity administrator to check your provider enrollment role, then confirm the selected market and payer space.
* **Out-of-network option missing or a network contract appears:** contact Anthem before continuing. Do not select in-network participation merely to get through the application.
* **Clinician recognition or supervision questions:** ask Anthem or the applicable behavioral-health administrator. Registration access does not prove recognition of a clinician category. See [Thrizer's supported claim structure](/help/claims/bcbs-reimbursement-and-registration#associate-pre-licensed-or-supervised-clinicians).

## What happens next

Anthem controls registration approval and timing. Contact Anthem for application status or incomplete clinician records. Application submission is not approval and registration does not guarantee reimbursement.

Complete your separate [Blue Shield of California registration](/help/claims/bcbs-blue-shield-ca-provider-registration). Once each required plan confirms that registration and required clinician affiliations are active, [notify Thrizer support and review what happens next](/help/claims/bcbs-reimbursement-and-registration#registration-confirmed-next-steps).