Your fee schedule is only worth what the carrier actually pays on it. A regular EOB audit is how you know.
Signing a PPO contract with a negotiated fee schedule protects you against underpayment — in theory. In practice, carriers make mistakes, apply the wrong fee schedule to specific procedures, or misroute claims through leased networks that don’t honor your rate.
Regular EOB auditing catches these errors before they compound. Here’s how to build an audit workflow that surfaces problems without consuming your billing team’s week.
Why EOB audits matter
Every EOB is a small test of whether your contract is being honored. When it isn’t:
- The practice absorbs the shortfall through write-offs
- The patient may be overcharged if patient responsibility is miscalculated
- The pattern can persist for years without anyone noticing
- Recovery gets harder the longer the underpayment continues
A single underpaid claim rarely matters. A systematic pattern across hundreds of claims matters enormously.
What to compare
A useful audit compares three numbers per claim:
- The billed amount — what you submitted.
- The allowed amount — what the carrier says is the contracted fee.
- The current contracted fee schedule — what should have been allowed.
The gap between #2 and #3 is what you’re looking for.
Frequency of audits
The right cadence depends on volume:
- High-volume practices — spot audits weekly, comprehensive audit monthly
- Mid-volume practices — spot audits every 2 weeks, comprehensive audit quarterly
- Any practice — full comprehensive audit annually at minimum
More frequent auditing catches problems earlier. Waiting until year-end means recovery may be limited by timely appeal windows.
Which claims to audit
Not every claim needs the same scrutiny. Prioritize:
- The top 3 to 5 carriers by production
- The 10 to 15 most common procedures
- Any procedure whose reimbursement feels inconsistent
- Any carrier that has recently applied a fee schedule change
- Random samples from carriers with less frequent claims
A structured sample is more useful than trying to audit every claim.
The workflow
A repeatable audit workflow:
- Pull last month’s EOBs for the target carrier.
- Match each procedure code to your current contracted fee schedule for that carrier.
- Flag any allowed amount below the contracted fee.
- Group flags by procedure and by date.
- Escalate patterns to the carrier for correction.
Individual outliers may be data entry errors. Patterns require action.
When flags are actually contract problems
Sometimes what looks like an underpayment is really a contract provision you didn’t fully understand:
- Downgrade language that permits lower payment on alternative treatments
- Bundling rules that consolidate paid procedures
- Fee schedule tiers you may not have realized applied to certain providers
- Effective date confusion when fee schedule updates are staged
Auditing surfaces these too — and prompts you to read your contract with fresh eyes.
When to escalate to the carrier
Once a pattern is confirmed:
- Contact the carrier’s provider relations line with specific claim examples
- Request a written explanation of the applied fee schedule
- Reference your contract by section number if possible
- Request retroactive correction on affected claims
- Set a follow-up date for confirmation
Carriers process corrections slowly. Follow-up cadence matters.
When the audit finds something bigger
Some audits reveal patterns that go beyond individual carrier errors:
- Systematic application of a lower rate across many claims
- Rented network routing that violates the direct contract
- Fee schedule outdated on the carrier’s end for months
- Underpayment on all claims from a specific provider or location
These aren’t billing errors. They’re contract disputes. And they warrant strategic response, not just individual claim appeals.
An EOB audit is the difference between hoping your fee schedule is being honored and knowing it is. Practices that audit consistently recover money they didn’t know they were losing — and prevent longer-term erosion of their reimbursement.
If you haven’t audited your EOBs against contracted fees recently, a complimentary assessment can show you what to expect.
👉 Schedule your complimentary assessment: https://pponegotiationsolutions.com