What is ERA enrollment?

It is the paperwork that tells a payer to send your remittances as an X12 835 file to a named receiver, usually your clearinghouse, instead of as paper or a portal download. Medicare requires a signed ERA enrollment form filed with the MAC; commercial payers route it through Optum, Availity, your EDI vendor or a payment vendor such as PaySpan.

What is the difference between ERA and EOB?

An EOB is the human-readable statement; an ERA is the machine-readable 835 version of the same remittance, built to be posted automatically. Aetna says you do not need to enroll in ERA to get electronic EOBs, and UnitedHealthcare says a practice that does not enroll in Optum Pay still gets a file per check plus paper EOBs in the mail.

Why has our ERA stopped arriving?

The most common cause is a routing change: Medicare allows one ERA receiver per provider, so when a second clearinghouse enrolls, the first link is removed. The second is a lapsed clearinghouse routing form. Check which receiver ID the payer has on file before assuming the payer is at fault.

How long does ERA enrollment take?

Stated turnarounds in 2026 range from Cigna's 10 business days and Novitas's two weeks, through TRICARE East's four weeks and UnitedHealthcare's roughly 30 days, to Evernorth's four to six weeks. Paper remits usually continue for a transition period after the first 835 arrives.

Can we just automate the portal downloads instead?

Only where the payer permits it. Aetna, Cigna, Evernorth, UnitedHealthcare, Optum and Anthem publish terms that prohibit robots, scraping or automated access without written approval, and Anthem's October 2026 terms name AI agents. ERA enrollment is the route that needs only the provider's signature.

ERA Enrollment Guide 2026: 835s Instead of Portal Downloads

The Short Answer

If someone on your staff logs into a payer portal each week to download remittances, the payer almost certainly already offers the same remittance as an X12 835 file that your practice-management system can post without anyone logging in. Getting it is an enrollment, not a project: a form, signed by the provider's authorized official, naming one receiver. This guide maps who you enroll with for each major payer, who has to sign, how long each payer says it takes, and the one rule that explains most "our ERA stopped" tickets. Two spokes carry the quotations: the Medicare and clearinghouse spoke and the commercial payer spoke. Everything was read from the payers' own pages on 2026-10-16.

Interest in this is rising. Google Trends shows US search interest for "era enrollment" at roughly four times its 2023 level in 2026, with "eft enrollment" and payer-specific variants (Aetna, Anthem, Change Healthcare) the related queries. The questions on the AAPC forum have not changed in a decade: can we use two clearinghouses, why did the 835 stop, and which one is better after the Change Healthcare outage.

ERA, EOB, EFT: Three Different Things

EOB (explanation of benefits): the human-readable remittance. Aetna's page says plainly, "You don't need to enroll in ERA to get electronic EOBs."
ERA (electronic remittance advice, the X12 835): the same remittance as structured data, built for auto-posting. Evernorth's EDI page: "The ERA supports auto-posting capabilities."
EFT: the money. Enrolling in EFT alone puts the deposit in the bank with nothing to post against; enrolling in ERA alone posts remits for a cheque that is still in the mail. Humana's Availity form makes the dependency explicit: "In order to receive ERAs through Availity, you must be receiving your EFT directly from Humana."

A practice downloading from a portal is usually reading EOBs or 835s by hand because the ERA was never routed to the system that posts.

Who You Enroll With, Payer by Payer

Payer	Enroll through	Who signs	Stated turnaround
Medicare Part B (Noridian, Novitas, Palmetto, First Coast)	The MAC's EDI enrollment (EDISS Connect, form 8292, Palmetto EDI application)	Authorized or delegated official on the CMS-855; clearinghouses may not sign	Novitas: two weeks; Palmetto via Office Ally: 15 business days; First Coast via Office Ally: up to 30 business days
Aetna	Optum Payer Enrollment Services	Not stated	Not stated
Cigna Healthcare	Your EDI vendor sends the enrollment	Not stated	ERA finalised within 10 business days; EFT two to six weeks
Evernorth Behavioral	Provider.Evernorth.com (EFT); EDI vendor (ERA)	Not stated	EFT four to six weeks
UnitedHealthcare	Clearinghouse requests 835 delivery; Optum Pay for payment	TIN Super Admin, W-9, voided check	About 30 days for 835; about 10 business days for EFT
Humana	Availity Payer Spaces, ERA/EFT Enrollment app	Not stated	Not stated
Anthem (Elevance)	Availity ERA Enrollment; EnrollSafe for EFT	Not stated	Not stated
BCBS plans (Illinois example)	Availity Transaction Enrollment, by the provider's Availity administrator; power of attorney for a billing service	Availity administrator	Letter with start date; paper stops 31 business days later
Wellcare (Centene)	PaySpan Health	Not stated	Registration about 10 minutes, then a test deposit
TRICARE East	PGBA EDI express enrollment; EFT/ERA package	Person submitting, with bank letter	Four weeks
Molina; TRICARE West	Not fetched (site blocked or unreachable)

The spokes quote each cell with its source.

The One-Receiver Rule

Medicare's Claims Processing Manual says remittance files go "either to the provider or to a designated receiver (which may be the submitter or another entity, but not both)", and Novitas states, "Only one receiver can receive ERA at a time." Availity says the same of its own routing: ERA files "can be sent to only one delivery location." Office Ally routes "all ERA files" to one username per NPI and tax ID and "cannot separate payers into multiple accounts."

That is the answer to the oldest thread on the subject. Claims can go out through two clearinghouses; the 835 comes back to one. When a practice adds a billing company with its own clearinghouse, or switches after an outage, the payer's receiver ID has to be changed deliberately, and the old receiver loses the feed the moment the new one is approved. A practice that "lost" its ERA almost always finds it in the other clearinghouse's mailbox.

Who Signs, and Who May Not

Payers are strict about this. Novitas: "Clearinghouse and Billing Service representatives are not permitted to sign for the provider." Noridian's EDISS: "Vendors are not permitted to enroll on behalf of a provider." Office Ally's own routing form: "Must be signed by the provider, practice/facility owner, or account owner. Signatures from billers or third-party organizations will be rejected." Availity and BCBS Illinois let a billing service be the receiver only with a signed provider authorization or a copy of the power of attorney.

For a billing company this sets the workflow: the company prepares the forms, the provider's official signs, the company files them and tracks the status. It cannot be done entirely on the company's side, which is why "we'll handle enrollment" from a vendor still means a signature request landing in the practice's inbox.

What Happens After Approval

The 835 does not replace paper overnight. Novitas keeps Part B paper remittances for "forty-five (45) days after initial enrollment for ERA"; BCBS Illinois discontinues its paper claim summary "31 business days from the date the provider begins receiving the ERA/EPS files"; BCBS Texas says the same at 31 days. Medicare's 835 is "available for retrieval for 60 days", so a clearinghouse that holds files without posting them has a two-month window before they are gone. A practice should confirm the first 835 posts in its system, not just that the clearinghouse shows it.

Why the Portal Is Not the Alternative

The obvious shortcut, a script that logs into the portal and downloads the files, runs into the payers' terms. Read on 2026-10-16: Aetna prohibits any "robot, spider, site search/retrieval application or other manual or automatic device" without "express prior written consent"; Cigna and Evernorth prohibit access "through interfaces, robots, crawlers, scripts, or other automated means (unless approved in writing by us)" and any use of "artificial intelligence model, tool, or capability"; UnitedHealthcare and Optum prohibit using "software or other means to access, 'scrape,' 'crawl,' or 'spider,'" their services and ask you not to circumvent an IP block; Anthem's terms effective October 1, 2026 prohibit access "through an artificial intelligence enabled system, agent, bot, or other automated means, including technologies acting on behalf of a user". Humana's and Molina's sites blocked non-browser access during research before any terms could be read.

Opexia's rule is the same for every payer: We automate a payer portal only where the payer's terms of use allow it or the payer has approved it in writing, and we do not work around CAPTCHA, bot detection or two-factor login. The 835 is the route that needs no payer's permission, only the provider's signature, and it is the first thing we do in First Payer Live: one payer's remittances posting in the practice's system with zero staff portal logins, live in three weeks, with the enrollment forms prepared for the provider's official to sign.

The Order to Do It In

Medicare first. The route is public, free and documented; it is the biggest remittance volume for most practices, and the MAC's EDI help desk will tell you which receiver ID is on file today.
The Availity payers next (Anthem, Humana, the BCBS plans): one login, one Transaction Enrollment screen, with the Availity administrator doing the clicks.
The Optum payers (Aetna, UnitedHealthcare): Optum's Payer Enrollment Services for Aetna, a clearinghouse request for UnitedHealthcare's 835.
Cigna through the EDI vendor, one enrollment per TIN.
The vendor-run payers (Wellcare via PaySpan, TRICARE East via PGBA).
Posting. Once 835s arrive, the remaining work is posting them, handling the paper EOBs that still come, and reconciling the payers that pay by virtual card. The EOB and ERA retrieval automation page describes that half.

Sources

Last reviewed 2026-10-16.

ERA Enrollment Guide: How to Get 835 Remittances Instead of Portal Downloads, Payer by Payer (2026)

The Short Answer

ERA, EOB, EFT: Three Different Things

Who You Enroll With, Payer by Payer

The One-Receiver Rule

Who Signs, and Who May Not

What Happens After Approval

Why the Portal Is Not the Alternative

The Order to Do It In

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Sources

Questions this article answers

EOB and ERA Retrieval Automation

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