A four-provider practice that had never thought about how to choose a clearinghouse for a medical practice asked us why their clean claim rate had dropped after they changed practice management systems. It had not dropped. Their new clearinghouse, bundled with the new system, was showing them a different report: claims accepted by the clearinghouse rather than claims accepted by the payer. The old vendor had been catching payer-specific errors before submission; the new one passed them through and let the payers reject them. Same practice, same staff, same payers, 40 more rejections a week, because a decision made as a checkbox on a software contract had changed how every claim was checked.
That is how most practices choose a clearinghouse: they do not. The practice management vendor has a preferred one, the setup fee is waived, and nobody asks what it does. Learning how to choose a clearinghouse for a medical practice is mostly learning what to ask, because the vendors look alike on a brochure and behave very differently on a Tuesday when a payer changes its edits.
Here is what a clearinghouse should do, the questions we ask on a practice's behalf, and how to switch when the answers are wrong.
Key takeaways
- A clearinghouse is the intermediary that receives your electronic claims, checks them, routes them to each payer, and returns acknowledgments, remittances and eligibility responses; it is not a passive pipe.
- The differences that matter are edit quality, payer connectivity, reporting, enrollment support and what happens when something breaks.
- The February 2024 Change Healthcare attack taught every practice that a single clearinghouse connection is a single point of failure; ask about redundancy before you sign.
- Switching is a six to eight week project dominated by payer re-enrollment for electronic remittances, and it should be planned around cash flow.
What a clearinghouse actually does
A glossary line for readers who have never looked behind the billing screen: when your practice management system "sends" a claim, it creates an electronic file in the HIPAA standard 837P format and transmits it to the clearinghouse. The clearinghouse checks the file for format errors and, if it is good at its job, for payer-specific content errors; then it translates the claim into whatever each payer requires and delivers it. The payer sends back a 277CA acknowledgment (accepted or rejected at the front door), later an 835 electronic remittance (what was paid and why), and the clearinghouse routes both back to you. The same channel carries eligibility requests and responses (270/271), claim status inquiries (276/277) and, with some payers, authorization requests (278) and attachments.
So the clearinghouse is a translator, a checker, a router and a reporter. Each of those functions can be done well or badly, and the practice feels the difference as rejections, delays, unreadable reports and hours on hold.
How to choose a clearinghouse for a medical practice: the questions to ask
We ask these in a demo and again in the contract review. The good answers are the ones that come with specifics.
| Question | Why it matters | A good answer sounds like |
|---|---|---|
| Which of our payers do you connect to electronically, and which drop to paper? | Paper claims add weeks; some regional payers and workers' compensation carriers are paper-only at some vendors | A payer list you can check against your own top 25, with the connection type for each |
| What edits do you run beyond HIPAA format checks? | Payer-specific edits catch rejections before submission; format-only edits do not | "We maintain payer-specific edits for these payers and update them when payers publish changes; here are examples" |
| Can we add our own edits? | Your practice has known problem patterns no vendor anticipates | Yes, with a rule builder or a support process, and a turnaround time |
| How is a rejection presented to our staff? | A rejection that reads "AAE*0*A7:562" is useless; a rejection that names the field is actionable | Plain-language rejection reasons mapped to the claim field, with a work queue |
| Who handles ERA and EFT enrollment with each payer, and how long does it take? | Each payer requires enrollment to send 835s to a new clearinghouse; this is the switching bottleneck | "We submit and track enrollments; typical payers take two to six weeks; here is our tracking view" |
| What does the eligibility response show? | Some vendors return raw 271 data; good ones normalize copay, deductible remaining and plan details | A sample response for a Medicare Advantage patient and a commercial PPO patient |
| What happened to your customers on February 21, 2024, and what changed after? | The Change Healthcare attack took a major clearinghouse offline for weeks and cut off cash for thousands of practices | A specific account of the outage impact and a described redundancy or failover arrangement |
| What is your uptime commitment and how do you notify us of outages? | An outage you learn about from missing remittances is an outage you learned about late | A written service level, a status page and proactive notification |
| What is the pricing structure? | Per claim, per provider per month, per transaction type and bundles produce very different bills at different volumes | A model you can apply to your own monthly counts; ask what is excluded |
| How do you handle secondary claims and attachments? | Automated secondary claims from the primary 835 save hours; attachments are increasingly needed | Automated secondary generation; supported attachment methods listed by payer |
| What reports do we get, and can we export them? | Clean claim rate, rejection reasons by field and payer, remittance turnaround by payer | Standard reports with export, and a sample of each |
| What are your security and compliance attestations? | The clearinghouse holds every patient's claim data | HIPAA compliant with a business associate agreement, SOC 2 compliant with a current report available on request |
Two of these deserve comment. The edits question is the one that separates vendors most in day-to-day experience, and it is the hardest to evaluate in a demo; ask for a list of the payer-specific edits maintained for your top three payers and ask how often they were updated last year. And the outage question is not rude. Any vendor operating in 2026 should have a thoughtful answer.
The 2024 lesson
On February 21, 2024 a ransomware attack took Change Healthcare, one of the largest clearinghouses in the country, offline. Practices connected through it could not submit claims, receive remittances or check eligibility for weeks. Many had no second connection and no cash reserve, and CMS eventually set up advance payment programs to keep them open. The lesson practices drew, correctly, is that the clearinghouse is critical infrastructure.
What that means for selection: ask whether the vendor has arrangements to route through alternative connections if its own are down; ask whether your practice management system can be pointed at a second clearinghouse quickly, and what that would take; and consider maintaining an account with a second vendor for your top two or three payers even if you rarely use it. It is a small recurring cost against a large, demonstrated risk. Keep the payers' own direct-submission portal logins current as a last resort.
Bundled or independent
Most practice management systems offer an integrated clearinghouse, sometimes their own, sometimes a partner under their brand. The integration is real: rejections appear in the work queue, remittances post automatically, eligibility runs from the schedule. Independent clearinghouses can connect to most systems, but the integration varies and the practice often has to log into a separate portal.
Our view: the integrated option is usually right for a small practice if it passes the questions above, and it is usually wrong if the answers to the edits and reporting questions are weak, because those two determine how much staff time the clearinghouse consumes. Ask the practice management vendor whether an alternative clearinghouse is supported and what it costs to use one; a vendor that refuses to answer is telling you something. Practices that work with a billing partner should also ask which clearinghouse the partner uses and why, because the partner's staff live in it daily and have opinions.
Switching without losing a month
A switch takes six to eight weeks and the critical path is payer enrollment for electronic remittance. Each payer must be told to send 835s to the new clearinghouse, and until they do, remittances either go to the old one (fine, if you still have access) or arrive on paper (not fine). Claims can usually flow to the new clearinghouse within days; remittance enrollment for Medicare, the state Medicaid program and the major commercial payers takes two to six weeks each, in parallel.
The plan we use: keep the old clearinghouse active for 60 days after the switch; submit new claims through the new vendor from the cutover date; submit enrollment for ERA with every payer on day one and track each to completion; post remittances from whichever clearinghouse receives them; and compare clearinghouse acceptance and payer 277CA acceptance rates for the first 30 days against the prior 90, so a change in edit quality is visible immediately. Cut over at the start of a month, not the end, and not in the weeks before a large seasonal collections period.
Payer ID mapping is the other trap. Each clearinghouse uses its own identifiers for payers, and the practice management system's payer table has to be re-mapped. Do this in a test environment first, and check the top 25 payers by hand. A payer mapped to the wrong ID rejects every claim, quietly, until someone notices the 277CA.
Questions we hear
Is a more expensive clearinghouse worth it?
It depends entirely on what the price buys. If the difference is payer-specific edits that stop 40 rejections a week, the staff time saved covers the cost many times over. If the difference is branding, no. Model the cost at your own volume and put it next to the rejection rate you observe in the trial.
Can we run two clearinghouses at once?
Yes, and some practices do it deliberately for redundancy or because one vendor connects better to a specific payer. The cost is complexity: two portals, two enrollment sets, two sets of reports to reconcile. For most small practices one primary plus a dormant backup is the practical arrangement.
Our clearinghouse is fine but the reports are unreadable. Is that a reason to switch?
Ask first whether the reports can be configured or exported into something readable; often they can. If the vendor cannot show you your clean claim rate at the payer front end, your top rejection reasons by field, and remittance turnaround by payer, then honestly, yes, that is a reason, because you are running your revenue cycle without instruments.
What to do this week
- Write down which clearinghouse you use, what it costs per month, and who at the practice can log into it.
- Pull the last 90 days of rejections and see whether they are presented in plain language with the field named.
- Find out whether you have any second connection or direct payer portal access you could use in an outage.
- If you are evaluating vendors, send them the twelve questions above and ask for written answers before a demo.
- If you decide to switch, start the ERA enrollment list now; it is the longest task and it can begin before anything else.
