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Most payers don’t run their own EFT enrollment, they delegate it to a handful of portals. Enroll once per portal, then manage every payer inside it. This directory maps 88 payers to 13 portals, with an excruciating-detail page for each payer.
Use the search bar (⌘K) with a payer’s name to jump straight to its page.

By portal

EnrollSafe (PayeeHub)

54 payers

Optum Pay (Optum Health Payment Services)

10 payers

Payer Enrollment Services

6 payers

Availity Essentials

4 payers

PaySpan (Zelis)

4 payers

ECHO Health

2 payers

Medicare, Novitas (CMS-588)

2 payers

Cigna for Health Care Professionals

1 payer

HAP (Health Alliance Plan)

1 payer

Medica (InstaMed + Optum Pay)

1 payer

Medicare, Palmetto GBA (CMS-588)

1 payer

PECOS (Medicare online enrollment)

1 payer

Texas Medicaid (TMHP PEMS)

1 payer

By payer

Don’t see your payer?

Check the remittance advice or EOB for the paying entity’s name, many plans pay through a clearinghouse (Zelis, ECHO, InstaMed) rather than under their own name. If it’s still missing, start from Enroll in EFT and ERA, which covers how to find any payer’s enrollment path from scratch.