After credentialing approval: pull the effective date, provider ID, and fee schedule from the welcome letter; register on the payer portal; enroll in EFT/ERA (Availity for most payers, Optum Pay for UnitedHealthcare); verify you're loaded in the claims system; then submit your first claim, with correct NPIs, taxonomy, and place of service, for a date of service on or after the effective date.
The approval letter is not the finish line. Credentialing approval, contract effective date, and being loaded in the payer's claims system are three different events, and the money only moves after the third. The week you spend on setup now determines whether your first claim pays in two weeks or bounces for two months.
What does the welcome letter actually tell you?
Three load-bearing facts, buried in congratulations. First, the effective date, the first date of service you can bill in-network. It is frequently weeks after the approval date, and sessions before it will not pay in-network no matter when you submit them. If you're tempted to see plan members while you wait, read billing before credentialing is complete first.
Second, the provider or contract ID the payer assigned you. Some payers want it on claims or portal registration; all of them want it when you call. Third, the fee schedule, either enclosed or available on request. Request it. It's the contracted rate per CPT code, and it's what tells you whether a future payment is correct or short.
An effective date in hand is still not proof you're in the claims system. Payers load new contracts in batches, and the lag between "approved" and "loaded" is where most first claims fail. Before you bill, run one eligibility check on a real client through the portal. If the system recognizes your NPI as in-network, you're loaded. This is the unglamorous final mile of the timeline covered in how long credentialing takes.
How do you get paid electronically (ERA/EFT)?
Enroll once per payer, before the first claim. EFT is direct deposit; ERA is the 835 remittance file that says how each claim processed: which codes paid, what the client owes, and why anything denied. Without ERA you're reconciling from paper EOBs; without EFT you're waiting on checks.
For Aetna, Anthem, and many BCBS plans, enrollment runs through Availity (free to register) under its transaction enrollment tools. Cigna enrolls through its CignaforHCP portal or your clearinghouse. UnitedHealthcare and Optum behavioral pay exclusively through Optum Pay, so that enrollment is mandatory, not optional.
Optum Pay has a pricing wrinkle worth knowing before you click: basic ACH is free, with 30 days of payment data and access to remittance detail. The premium tier costs 0.5% of every payment: $0.55 on a $110 session, capped at $2,500 per month per TIN, in exchange for 13 months of data history and reconciliation tooling. For a solo practice whose EHR or clearinghouse already stores the 835s, basic is usually enough; premium is a fee on revenue you can decline.
Whatever you enroll in, the deposit lands under the payer's processor name, not the payer's brand. An Optum Pay deposit won't say "UnitedHealthcare" on your bank statement. Match deposits to ERAs by check/EFT trace number, not by name or amount.
Should you submit claims through a clearinghouse, your EHR, or the payer portal?
Use whatever your EHR includes, and fall back to the portal only when you must. The real comparison:
| Channel | Cost | Best for | Watch out for |
|---|---|---|---|
| EHR with built-in claims | Often bundled per-claim | Ongoing practice billing | Payer ID setup errors on first use |
| Clearinghouse directly | Free-low per claim | Batch submission, multi-payer status | Separate enrollment step per payer |
| Payer portal (Availity etc.) | Free | First claim tests, corrections, one-offs | Manual entry; no central record |
| Paper CMS-1500 | Postage plus weeks | Payers with no electronic option (rare) | Slowest possible path |
A reasonable first move: submit claim number one through the portal, where rejections surface fastest and you can see exactly what the payer received. Once it pays cleanly, move the volume to your EHR or clearinghouse and let the portal be your correction tool.
What fields sink first claims?
Four of them, over and over. A whole first batch can deny in a single remittance over two field errors: an EHR that auto-filled the group's Type 2 NPI in the rendering-provider field, and telehealth sessions billed as POS 11, office. Fixed and resubmitted as corrected claims, the same claims pay the following cycle. Nothing about the credentialing was wrong; the claims just didn't match the enrollment.
Billing vs rendering NPI. The rendering provider (box 24J) is you, the individual Type 1 NPI. The billing provider (box 33a) is whoever holds the contract and gets paid: your Type 1 again if you're solo, or the practice's Type 2 if you bill under an LLC or group. Swapping these is the classic first-claim denial.
Place of service. Office is POS 11; telehealth with the client at home is POS 10 (usually with modifier 95); telehealth anywhere else is POS 02. The POS must match where the session actually happened, with details in telehealth POS codes.
Taxonomy. The taxonomy code on the claim should match what's on your NPPES record and your enrollment. A mismatch reads as "different provider" to some claim systems.
Date of service vs effective date. One more time, because it's the most expensive one: the session date, not the submission date, must be on or after your effective date.
What do you do with the first denial?
Read the code, fix the field, resubmit. A denial is a field-level message: the ERA carries a claim adjustment reason code that names the problem (effective date, NPI mismatch, POS, eligibility), and nearly all first-claim denials are correctable and resubmittable within the payer's timely filing window, commonly 90-180 days from the date of service. The claim that pays after one correction still pays in full.
- 1. Extract the letter (15 min). Record: effective date, provider/contract ID, fee schedule or how to request it, payer ID for claims, and the provider services phone number. One page, kept where you bill.
- 2. Request the fee schedule if not enclosed (15 min, plus days to weeks for the payer to send). You need contracted rates for your top codes: 90791, 90834, 90837.
- 3. Register on the portal (30-60 min). Availity for Aetna/Anthem/most BCBS, CignaforHCP for Cigna, Provider Express for Optum behavioral. Verify your NPI, TIN, and practice address display correctly.
- 4. Enroll in EFT + ERA (30 min per payer, plus 1-4 weeks to activate). Availity transaction enrollment, or Optum Pay for UHC/Optum (choose basic - it's free - unless you want premium's data history at 0.5% per payment). Route ERAs to your EHR or clearinghouse.
- 5. Confirm you're loaded (10 min, repeat weekly until yes). Run a portal eligibility check on a real member with your NPI. An in-network result means you're loaded; not found means call provider services with your contract ID.
- 6. Set up the claim template (30 min). Rendering NPI is your Type 1. Billing NPI is the contract holder (Type 1 solo, Type 2 group/LLC). Taxonomy matching NPPES. POS 11 office / POS 10 telehealth-home with modifier 95. Contracted CPT codes and rates from step 2.
- 7. Submit one test claim (20 min). First date of service on or after the effective date. Submit via portal for fastest visibility. Note the claim number.
- 8. Track it (5 min every few days; expect 7-21 days). Portal status runs received, then in process, then finalized. When the ERA arrives, check the paid amount against the fee schedule.
- 9. If it denies: read the code, fix, resubmit (30 min). Match the reason code to the field, correct, resubmit as a corrected claim within timely filing. One denial is setup feedback, not a pattern.
- 10. Go to volume (ongoing). Move billing to the EHR/clearinghouse, calendar your CAQH re-attestation and recredentialing dates, and file the fee schedule where you'll find it at renegotiation time.
Getting paneled was the hard part, the same application marathon that tools like paneled.ai exist to run for you. This last mile is mechanical and checkable, and after the first clean claim it's just how your practice gets paid.
Common questions
- I just got credentialed with an insurance panel. What do I do first?
- Read the welcome letter and extract three things: your effective date, your provider or contract ID, and the fee schedule (or where to request it). Then register on the payer's portal, enroll in EFT and ERA so payments and remittances arrive electronically, and only then submit a claim, for a date of service on or after the effective date.
- What is ERA and EFT enrollment and do I need it?
- EFT (electronic funds transfer) is direct deposit for claim payments; ERA (electronic remittance advice, the 835 file) is the electronic explanation of how each claim paid. Most payers enroll you through Availity or, for UnitedHealthcare/Optum, through Optum Pay. Yes, enroll before your first claim: paper checks and paper EOBs add weeks and make reconciliation miserable.
- Does Optum Pay charge a fee for direct deposit?
- Basic Optum Pay ACH is free and includes 30 days of payment data and remittance access. The premium tier adds longer data history and practice-management features for 0.5% of each payment, capped at $2,500 per month per tax ID. Most solo therapists do fine on the free basic tier plus their clearinghouse's ERA copy.
- Why was my first insurance claim denied even though I'm credentialed?
- Usually a setup mismatch, not a credentialing problem: a date of service before your effective date, the wrong NPI in the rendering or billing field, a taxonomy code that doesn't match your enrollment, or a telehealth place-of-service code the plan didn't expect. Read the denial code on the ERA, fix the field, and resubmit as a corrected claim. First denials are normal and almost always recoverable.
The paneled.ai team · Credentialing specialists. We file and track insurance credentialing applications for behavioral health providers every day — these guides come from what we see go wrong (and right) in real applications.