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A clearinghouse is the postal service of medical billing: it takes claims from your EHR in one format, translates and scrubs them for each payer’s quirks, routes them, and carries the responses back.

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What flows through it

Claims out (837): scrubbed against payer edits before submission, so errors bounce in minutes instead of denying in weeks. The acknowledgment trail (accepted, rejected, pending) is your early-warning system; a rejected claim never even entered the payer’s system, and nobody tells you unless you read the reports. Remittances back (835s): ERA delivery is routed by enrollment, which is why clearinghouse choice and ERA enrollment are entangled. Eligibility (270/271) and claim status (276/277) ride the same pipe.

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What it is not

It’s not the payer (a clearinghouse acceptance is not a payment decision), and it’s not your bank (money moves by EFT directly from payer to your account; the 835 is just the explanation, reassociation ties the two together). Choosing and setting one up: Choose your clearinghouse.