What is EDI 837?
The standard electronic file used to submit claims to a payer — the outbound counterpart to the 835.
Definition
The EDI 837 is the Health Care Claim transaction: the file a provider sends to a payer, directly or through a clearinghouse, to request payment for services rendered. It carries subscriber and patient identity, provider identifiers, diagnosis codes, and one service line per procedure with its charge, units, modifiers, and diagnosis pointers.
It comes in variants by setting — 837P for professional claims, 837I for institutional, 837D for dental — each with its own required loops and segments. Payers publish companion guides specifying which optional elements they require, which is why a claim that validates against the base standard can still reject at a specific payer.
The 837 and the 835 form a matched pair: what you claimed and what the payer decided. Comparing them line by line is the mechanism behind underpayment detection, because it is the only way to see that a claim was paid but paid short.
Why it matters
A claim submitted in an 837 that never appears in any 835 is unanswered — and unanswered claims are the quietest form of lost revenue, because nothing ever denied and nothing ever alerted anyone.
Denial codes to know
Related terms
See this in your own numbers
PayerVista turns the remittance files your payers already send into a live view of claims, denials, payer performance, and outstanding AR — in minutes, with no implementation project.