Claim scrubbing is the review of a medical claim for errors before it goes to the payer. The review checks patient data, codes, modifiers, provider details, and payer rules, so mistakes get fixed before they turn into rejections or denials. Many practices use scrubbing software, and some add a manual review on top of it.
This guide covers the claim scrubbing techniques billing teams use, the errors each one catches, and how to measure whether your process works.
Why Claim Scrubbing Matters
A claim with an error costs more than a clean one. It has to be corrected, resubmitted, and tracked again, and the payment is delayed in the meantime. If the error isn’t caught or the appeal window closes, the revenue may not be recovered.
Claim scrubbing also depends on the difference between a rejection and a denial:
- Rejection: The claim is stopped before the payer adjudicates it, usually at the clearinghouse or the payer’s front-end system, because of a formatting or data error. It was never processed, so you correct it and resubmit.
- Denial: The payer evaluated the claim and denied it or part of it because it lacked medical necessity, had failed to obtain authorization, or was not a covered service. Appeals or claims for correction are required.
Scrubbing is most effective against rejections and the denials that come from avoidable errors, like wrong codes, missing modifiers, and ineligible coverage. It can’t fix a service the payer doesn’t cover.
8 Claim Scrubbing Techniques
1. Verify patient demographics and insurance details
Check that the patient’s name, date of birth, subscriber ID, group number, and payer ID match the insurance card on file. A misspelled name or a transposed digit in the member ID is among the most basic reasons for a front-end rejection, and also one of the easiest to prevent.
2. Confirm eligibility before submission
Run an eligibility check (the 270/271 electronic transaction) before the visit, and again before billing if time has passed or the patient’s coverage may have changed. Look for active coverage on the date of service, the correct plan, and whether the patient has a secondary payer. Claims sent to a terminated or incorrect plan are denied for eligibility.
3. Validate procedure and diagnosis codes
Confirm that every CPT, HCPCS, and ICD-10-CM code is valid for the date of service. Codes are added, revised, and deleted on a regular schedule, so a code that was valid last year may not be now. Check that diagnosis codes are reported to the highest level of specificity, because payers reject claims with truncated or non-billable ICD-10-CM codes.
4. Check that diagnoses support the procedures billed
Each billed service should be linked to a diagnosis that supports medical necessity. For Medicare, this includes Local Coverage Determinations (LCDs) and National Coverage Determinations (NCDs), which list the diagnoses that support certain services. Many commercial payers publish similar medical policies. A scrubber with these rules loaded can flag a mismatch before the claim leaves your system.
5. Review modifiers
Modifiers change how a payer interprets a code, so wrong or missing ones are a common source of denials. Check that modifiers like 25, 59, LT/RT, and the X-modifiers (XE, XS, XP, XU) are used only when documentation supports them. Check also that the payer accepts the modifier for that code. Modifier 59 in particular is often reviewed by payers, so it should never be added just to get a claim past an edit.
6. Apply NCCI edits and MUEs
The National Correct Coding Initiative (NCCI), run by CMS, includes procedure-to-procedure (PTP) edits that identify code pairs that generally shouldn’t be billed together and Medically Unlikely Edits (MUEs) that set the maximum units of a service per patient per day. Medicare and Medicaid use these edits, and many commercial payers apply similar logic. Scrubbers that include current NCCI tables will catch unbundling and excess units.
7. Check payer-specific rules
Each payer sets their own claims requirements. This may include variations in how provider fields, taxonomy codes, place of service codes, and attachment requirements are rendered vs. billed. Review the NPI for every claim and ensure that the provider is registered with that particular payer. A claim that is valid by general coding rules may still be rejected due to the rules of one particular payer.
8. Verify authorizations and timely filing limits
When a prior authorization is required by the payer, confirm that the authorization was obtained and that the authorization number on the claim is the same as the approved service, dates, and units. Also check the filing deadline. Medicare, for example, generally requires claims to be filed within 12 months of the date of service, and commercial payers often set shorter limits, which are stated in the provider contract. A claim filed after the deadline is typically denied, and the denial is rarely overturned.
Manual vs. Automated Claim Scrubbing
Automated scrubbing runs every claim through a set of rules in seconds. It can process large volumes and shows consistent errors like incorrect codes, missing fields, NCCI conflicts, and mismatching payer IDs. Its limit is that it only checks what it has been configured to check, so the rules must be updated when payers or code sets change.
Manual review is slower, but a trained coder can catch problems software misses, such as documentation that doesn’t support the level of service billed, or a diagnosis that doesn’t fit the clinical picture. Most practices get the best results by scrubbing every claim automatically and reviewing high-dollar, high-risk, or frequently denied claims by hand.
Common Errors Scrubbing Catches
- Missing or invalid subscriber ID
- Patient name or date of birth that doesn’t match payer records
- Deleted, invalid, or non-specific ICD-10-CM codes
- Missing or incorrect modifiers
- NCCI PTP conflicts and MUE violations
- Duplicate claims
- Invalid NPI or provider not enrolled with the payer
- Incorrect place of service code
- Missing prior authorization number
- Gender or age conflicts with the service billed
How to Measure Your Scrubbing Process
Two metrics show whether your process works:
Clean claim rate: the percentage of claims that are free of errors when they are submitted. A claim is clean if it can be processed without being rejected or needing correction.
First-pass acceptance rate: claims accepted by the payer on the first submission, divided by total claims submitted, multiplied by 100.
Track both by payer and by error type. If one payer rejects far more claims than the others, the cause is usually a specific rule your scrubber doesn’t have yet.
Best Practices
- Update your scrubber’s rule sets whenever code sets, NCCI tables, or payer policies change.
- Review rejection reports each week and turn recurring errors into new scrubbing rules.
- Feed denial data back to your front desk and coding staff so errors are fixed where they start.
- Scrub claims daily instead of in batches, so corrections happen within the filing window.
- Assign someone to own payer rule updates.
Get Support With Claim Scrubbing and Denial Management
A scrubber only works as well as the rules behind it and the people who act on its reports. For many practices, keeping rule sets current, working rejection queues, and tracing denials back to their cause takes more staff time than they have.
Rapid RCM Solutions is a medical billing and revenue cycle management company that supports practices with claim submission, denial management, and A/R follow-up. If your team is spending too much time correcting and resubmitting claims, visit rapidrcmsolutions.com to see how we can help.
FAQs
What is claim scrubbing in medical billing?
It is the pre-submission review of claims for coding, data, and payer-rule errors, done by software, billing staff, or both.
Is claim scrubbing the same as a clearinghouse edit?
Not exactly. A clearinghouse runs its own edits and passes claims to payers, but a dedicated scrubber usually applies more detailed coding and payer-specific rules. Many clearinghouses include scrubbing, so check what yours covers.
Does claim scrubbing prevent all denials?
No. It prevents errors that can be detected from the claim data. Denials for lack of medical necessity, non-covered services, or documentation problems can still occur.
How often should scrubbing rules be updated?
Whenever a code set, NCCI table, or payer policy changes. ICD-10-CM and CPT codes are revised annually, and NCCI edits are updated quarterly.
