835 and ERA remittance guides

Start with the question in front of you: what was paid, why an amount changed, or which document you need. These guides explain the reading workflow and link to the official references.

• How to read an 835 ERA file

  A practical review order for payments, claims, service lines, adjustments, and provider-level differences.

• 835 segments explained: BPR, TRN, CLP, CAS, SVC and PLB

  Find the payment, trace, claim, adjustment, service and provider-level information in a remittance.

• Claim adjustment codes: CO, PR, CARCs and RARCs

  Read common adjustment combinations and decide what to check before posting or following up.

• 835 vs EOB: what billing staff need to know

  Understand the difference between a machine-readable ERA, a member EOB and the actual payment.

Code descriptions and payer instructions can change. Each article includes its source links and review date. For the full specification, use the current X12 implementation guide and the payer's companion guide.