ERA vs EOB: what's the difference?

An EOB (explanation of benefits, or provider remittance advice) is the human-readable statement a payer sends with a payment. An ERA is the same information as an X12 835 file that software can post automatically.

Side by side

• Format — EOB: paper or PDF. ERA: a structured text file.
• Posting — EOB: keyed by hand. ERA: auto-posted by your practice-management system.
• Codes — both use CARC group/reason codes and RARC remarks.
• Payment — ERAs usually pair with EFT; the TRN trace number matches the deposit.

When you need to read the raw ERA

Auto-posting failed, the PM system shows a summary only, you changed billing companies, or you're auditing a payer's recoupments. Open the 835 in Remitgrid to see it as a readable remit, check that it balances, and print or export it.

Last reviewed 2026-10-27. Code lists and payer policies change — confirm with X12 (x12.org/codes), the payer and your clearinghouse. Not billing, coding or legal advice.