Claim Rejected vs. Denied: What’s the Difference?
By George Ruan • October 7, 2026
Last reviewed: October 7, 2026.
A rejected claim was stopped by the clearinghouse or the payer’s front-end edits before it was ever processed, so you fix the failed field and send it again. A denied claim was processed and decided, so the reason code on the EOB or remittance tells you what went wrong and which remedy fits. Telling the two apart first saves most of the back-and-forth.
Sections
How to tell a rejection from a denial
Rejected: the claim bounced at the clearinghouse or the payer’s front door. It shows up as a rejection in your EHR or clearinghouse report, there is usually no payer claim number, and a payer representative often cannot find it at all, because it was never adjudicated.
Denied: the payer processed the claim and decided not to pay all or part of it. The decision appears on an EOB or ERA with a payer claim number and reason codes, even when the payment is $0.
SimplePractice’s rejection guide makes the same distinction and explains why payer staff may not see a rejected claim in their system.
SimplePractice: resolving claim rejections
Rejections we see most, and the fix
Missing telehealth modifier on a video session. Add the modifier and refile. Then fix the default setting for virtual appointments, or every video session will be rejected the same way.
Wrong client address. We have seen a rejection caused by a client record pointing to a second home in another state. Correct the client profile, not just the claim, and refile.
Claim sent to the wrong plan. If the rejection names an insurer that does not match the client’s card, the payer on the policy is wrong. Get the front and back of the card, fix the routing, and resend.
When a rejection message is vague, ask your EHR or clearinghouse which field failed. Change only that field, so you do not create new mismatches. Because the payer never processed a rejected claim, the fixed claim goes out as a new original. In SimplePractice, even a “corrected claim” created from a rejection is submitted as an original (see its corrected-claim workflow).
Denials we see most, and what they point to
With a denial, the first job is to work out whose mistake it was. The reason code usually lands in one of these buckets:
Wrong place of service. A telehealth session billed as in-office is a common denial. The billed data was wrong.
Plan-specific telehealth coding. Telehealth modifier rules differ by payer. We have seen a Medicaid managed-care plan pay $0 because the claim carried the modifier a commercial plan expects instead of the one that plan required. Also a data problem, specific to that plan.
Diagnosis or coding error. The chart has to be fixed by the clinician before any claim change, so start there.
The client changed insurance. A denial from the old plan is not the end of the claim. Once you have the new plan’s effective date and member ID, refile the dates it covers to the new plan.
Provider enrollment mismatch. A payer may process a claim under a provider category the clinician is not enrolled under. Do not change a correct taxonomy just to make the denial go away. Verify the enrollment with the payer and ask it to reprocess.
SimplePractice’s denial guide lists the same broad categories: provider information, coverage, coding, eligibility, and timely filing. The reason code on the remittance tells you which one you have.
SimplePractice: handling claim denials
What to do first
Match the response to the exact submission it describes. With several attempts on one appointment, the newest status may belong to a replacement, not the original.
Classify it: rejected (never processed) or denied (processed, with a payer claim number).
Fix the source record (client profile, provider settings, or payer on the policy) so the next claim does not repeat the error.
For a denial, decide whether your data was wrong, the claim should not exist, or the payer’s decision was wrong. Each has a different remedy; our guide to choosing a corrected claim, void, or appeal walks through that decision.
Keep the original response, the change you made, and the new acknowledgment together so the next person can follow the history.
If you would rather hand this work off, see how to work with your biller.
Related Guides
Frequently Asked Questions
Why can’t the insurance company find my rejected claim?
A rejected claim was stopped before adjudication, so it often never entered the payer’s claims database. Ask your clearinghouse for the rejection detail instead.
My biller says a claim was rejected. Do I need to do anything?
Usually not, unless the fix needs something only you have, such as a new insurance card or a corrected client address. It is worth asking which setting caused it so it does not keep happening.
The payer paid $0. Was the claim denied or rejected?
If there is a remittance with a payer claim number, the claim was processed, so treat it as a denial and read its reason code. A rejection produces no remittance at all.
Sources
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