Part 3: How to Apply to Major Insurance Panels
🕒 Updated on Last Modified Date
If you completed Part 2 and gathered your documents, you are ready for the part most providers dread, actually applying to insurance panels.
Here is the good news. Most credentialing workflows follow a similar path. The details change by payer, but the process becomes much easier when you approach it the same way every time: prepare, submit, track, follow up, and confirm effective dates before billing.
Below is a practical, provider-friendly breakdown of how to apply to the major payers, what to expect, and how to avoid the most common slowdowns.
Step 1: Decide which panels to apply to first
Before you apply everywhere, get strategic. Start with your “Top 3” panels based on:
- The insurance plans your ideal clients already have
- Referral sources in your area (primary care, psychiatry, other therapists)
- Reimbursement potential and administrative burden
- Your availability, because being in-network can increase inquiries quickly
If you are a therapist or behavioral health practice, your “Top 3” is often a mix of a dominant local BCBS plan, one national commercial plan, and one EAP-style or behavioral carve-out network (depending on your state and specialty).
Step 2: Make sure your CAQH is complete (for commercial plans)
Most commercial plans use CAQH as the foundation for credentialing. Your goal is to have a clean, fully attested profile that matches your documents and your NPI record.
If you do not have a CAQH profile yet, start with the provider overview page at CAQH: https://www.caqh.org/providers and then log in to CAQH ProView to build and maintain your profile.
Before you submit payer applications, confirm:
- Your CAQH profile is complete and attested
- Documents are current (license, malpractice, W-9, CV)
- You have authorized the payers that need access
Credentialing delays often come from one of three CAQH issues: a missed attestation, an expired document upload, or inconsistent addresses between CAQH, your W-9, and your NPI record.
Step 3: Confirm your NPI record is correct
Insurance companies rely on your NPI data, so make sure it is accurate before you apply.
You can check your public listing in the NPI Registry. If you need to apply for or update your NPI details, use NPPES.
If you are newer to practice and need clear guidance on applying for an NPI, CMS has a helpful overview here: https://www.cms.gov/medicare/regulations-guidance/administrative-simplification/how-apply
Pro tip: Your name, credentials, practice address, and taxonomy should match across CAQH, your NPI record, and your credentialing applications as closely as possible. Small mismatches can cause unnecessary verification requests.
Step 4: How to Apply to Insurance Panels by Payer (what changes, what stays the same)
Blue Cross Blue Shield (BCBS)
BCBS is not one single payer. It is a network of state or regional plans, each with its own provider onboarding process.
What to expect:
- Some states start with an online interest form, others with a provider application
- Panel status can vary by specialty and ZIP code
- Behavioral health may have separate pathways or delegated credentialing in some markets
Pro tips:
- Apply to the BCBS plan for the state where you are treating patients (not necessarily where you live)
- Track the specific plan name (example: Anthem, Highmark, Excellus, Florida Blue)
- Do not assume “BCBS approval” transfers between states
If your BCBS plan is Anthem-affiliated, Anthem’s provider onboarding typically starts here: https://www.anthem.com/provider/individual-commercial/join-our-network
Aetna
Aetna has a structured network participation flow and commonly relies on CAQH for verification.
A good starting point is Aetna’s “Join the Network” page. Some regions also route providers through the Provider Onboarding Center for onboarding and status workflow: https://extaz-oci.aetna.com/pocui/
What to expect:
- Behavioral health may involve payer-specific steps depending on region
- You will likely be asked to confirm CAQH is complete and authorized
- Timelines vary widely by specialty and location
Pro tip: Make sure your taxonomy code is correct and consistent across systems, especially if you have multiple service lines.
Cigna / Evernorth (behavioral network)
For many mental health clinicians, credentialing and contracting routes through Evernorth (behavioral health network support). Network availability can depend heavily on location and specialty. A general credentialing overview can be found here: https://www.cigna.com/health-care-providers/credentialing
Evernorth’s credentialing process details can be referenced here.
What to expect:
- An interest form or application pathway to be considered for network participation
- Network need varies, and some areas may be closed or limited
- Additional documentation requests even after CAQH is reviewed
Pro tip: If your region is closed, keep your CAQH updated and revisit later. Network openings change, and being prepared makes it easy to reapply quickly.
UnitedHealthcare / Optum (Provider Express for behavioral)
UnitedHealthcare has multiple onboarding paths depending on specialty. Behavioral health is often connected to Optum resources and Provider Express workflows.
A common starting point is UHC’s “Join Our Network” page. For behavioral health network specifics, UHC also maintains a behavioral network resource page here.
What to expect:
- Multi-step process, often involving credentialing, contracting, and portal enrollment
- Different departments for different parts of the workflow
- Requests for clarifications even after initial submission
Pro tip: Track who you spoke with and what department they are in. Credentialing, contracting, and portal support often do not share the same queue, and having clear notes speeds up follow-up.
Step 5: Medicare and Medicaid (different process, different systems)
Medicare (PECOS)
Medicare enrollment is handled through PECOS, which is a federal enrollment process, not traditional commercial credentialing. Start with PECOS here. CMS also provides a Medicare enrollment overview here.
What to expect:
- Initial enrollment or updates through PECOS
- Ongoing maintenance and periodic revalidation
- Additional steps depending on provider type and billing structure
Medicaid (state-specific)
Medicaid enrollment varies by state, and the first step is typically your state Medicaid provider enrollment website or portal. Some states require separate enrollment steps before managed care plans will issue contracts.
Pro tip: Medicaid timelines can be longer than commercial plans depending on screening requirements, portal processing, and program-specific enrollment rules.
Step 6: Track everything (this is what keeps you sane)
Credentialing is not hard because it is complicated, it is hard because it is easy to lose track. Track these fields for every payer:
- Payer name and network type
- Date submitted
- Method submitted (portal, email, form)
- Application or reference number
- Credentialing contact information
- Status and follow-up dates
- Approval date and effective date
- Contract received and returned dates
Even a simple spreadsheet will help you stay proactive and prevent stalled applications from sitting unnoticed.
Step 7: Confirm effective dates before you bill
One of the biggest mistakes providers make is assuming “approved” means “ready to bill.” You are not truly ready until you have:
- Confirmation you are in-network
- A contract executed (when applicable)
- An effective date you can bill from
- Portal access or payer ID details needed for claims submission
If you start seeing clients too early, you risk denials and unnecessary client confusion around benefits.
Coming up in Part 4
In Part 4, I will break down what happens after you submit, realistic timelines, how often to follow up, and what to do when an application stalls, including the exact follow-up scripts that get responses.
If you want, I can also add a “Start Here” checklist box at the end of this post that links back to Part 2 and encourages readers to book credentialing support.
Need help with credentialing?
If reading this made you think, “I do not have the time (or patience) for this,” you are not alone. Credentialing/enrollment is one of those behind-the-scenes tasks that can feel deceptively simple until you are juggling multiple portals, document requests, follow-ups, and effective dates, all while trying to run a practice and care for clients. If you want to stop guessing and get paneled without the stress, reach out and let’s talk about what you need.
