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For most multi-provider OBGYN groups collecting $1 million or more per month, OBGYN underpayments cost between 2 and 4 percent of collected revenue across the first half of 2026, and almost none of it shows up on a standard denial report.
Underpayments are not denials. They are claims paid, posted, and closed out below the contracted rate, which means most practices never flag them for review. By the time a group notices flat collections despite steady visit volume, months of recoverable revenue have already crossed the appeal window.
What “OBGYN Underpayments Cost” Actually Means
OBGYN underpayments cost is the cumulative gap between what a payer contractually owes and what it actually remitted, across every CPT code and payer combination billed. Unlike a denial, an underpaid claim generates no rejection and no task for staff to chase. It is accepted as paid and moved off the aging report, which is why it survives quarter after quarter uncorrected.
The first half of 2026 matters because several payers shifted claim review behavior mid-cycle. UnitedHealthcare and Aetna both expanded AI-assisted claim review this year, applying automated logic to Modifier 25 pairings and global maternity code selection, producing silent repricing rather than outright denial exactly where most practices are not looking.
How to Calculate What Underpayments Cost Your Group
You do not need a full audit to get a directional number. Pull your contracted fee schedule for your top five payers by volume, then compare it against actual remittance on 25 to 50 claims per payer across January through June.
Use this threshold to decide whether the sample justifies a full audit: more than 8 percent of sampled claims showing variance, or any single variance exceeding 5 percent of the allowed amount, means escalate to a full remittance review for that payer. Below that, log the exceptions and recheck next quarter.
First Half 2026 Underpayment Cost Formula
| Variable | What It Measures | Where to Find It |
|---|---|---|
| Claim volume (H1) | Total claims billed to a given payer, January to June | Practice management system claim export |
| Variance incidence rate | Percentage of sampled claims paid below contracted rate | Manual comparison of remittance vs. fee schedule |
| Average underpayment per claim | Dollar difference between contracted and paid amount | Same comparison, averaged across variance claims |
| H1 underpayment cost | Claim volume x variance incidence rate x average underpayment | Multiply the three figures above |
Where First Half Underpayments Concentrate in OBGYN
| Claim Type | Common Underpayment Trigger | Correction Path |
|---|---|---|
| Global maternity package | VBAC or repeat cesarean repriced to a lower-value code (e.g., 59618 paid as 59510) | Contract dispute citing the fee schedule line for the correct code, since the claim was coded correctly |
| Co-managed OB care | Modifier 54 or 55 omitted, duplicated, or applied to the wrong provider | Corrected claim resubmission, no formal appeal required in most payer manuals |
| Well-woman and preventive visits | ICD-10 specificity mismatch downgrades the claim to a lower-tier preventive code | Corrected claim with the specific diagnosis code supporting the higher-tier service |
| Gynecological surgical claims | Bundling logic applied beyond what the contract actually specifies | Contract dispute referencing the payer’s bundling policy against the negotiated terms |
What to Do Once You Find a Variance
Confusing the two correction paths above is the most common reason underpayments never get recovered. A coding or modifier error goes back as a corrected claim, no formal appeal required: Ohio Medicaid MCO CareSource’s provider manual is explicit that a claim processed incorrectly due to incomplete information should be resubmitted as a correction. A correctly coded claim paid below the contracted rate is different: that is a contract dispute, and it should cite the specific fee schedule line item, not just the claim number, or it risks being processed as a routine appeal instead of a rate correction. CareSource gives Ohio Medicaid providers up to 365 days from date of service to raise a payment error; many commercial payers set a shorter window, often 90 days from remittance, for a formal reconsideration request.
Why This Requires More Than a Denial Management Process
A strong denial management workflow catches claims rejected outright, not claims paid at the wrong rate. Finding underpayments means comparing remittance against contract terms on claims already closed, a different discipline than working a claim denial queue. Generalist medical billing services tend to miss this for OBGYN groups, since global maternity coding and co-management modifiers require depth a general RCM team rarely applies to remittance review. Specialty-trained OBGYN billing services build payer-contract comparison into standard revenue cycle management, not a once-a-year audit.
Practices sitting on unworked old AR recovery balances face a compounding problem: staff chasing aged denials have little bandwidth left for fee-schedule comparisons, and any new physician added without airtight credentialing risks fresh claims paid at out-of-network rates. For more on 2026 payer variance mechanisms, see MBC’s coverage of global package denial trends and protecting global maternity revenue.
Why This Is an EBITDA Problem, Not Just a Billing Problem
For a single-site practice, the calculation above is a useful spot check a billing manager can run directly. For multi-site OBGYN groups and PE-backed platforms, it is a starting point, not an answer. A consolidated collections report blends site, payer, and provider-level variance into one aggregate figure, so a material underpayment pattern at one location can sit invisible inside an otherwise healthy consolidated number.
That is the kind of gap that tends to surface during a quality-of-earnings review rather than before one, landing as a downward adjustment to net realized revenue instead of a correctable operational finding. Underpayment leakage compresses Yield EBITDA directly: revenue already earned and remitted, simply never fully captured at the site or provider level. Protecting it is an Enterprise Revenue Integrity function requiring the same site-by-site, payer-by-payer visibility a diligence team will eventually apply. Groups preparing for a transaction, or reporting to a board on a rolling basis, are better served identifying this variance on their own terms, with a dedicated account manager already holding that visibility, than having it surface later during diligence.
Conclusion
The first half of 2026 is already closed, so any underpayment inside it is either still inside its appeal window or aging out of one. Running the calculation above will not recover a dollar by itself, but it tells you whether the gap is worth investigating before the second half repeats it, and whether it needs site-level visibility beyond a spot check. MBC brings 25+ years of OBGYN-specific billing experience, a 97% clean claim rate, and a 30% A/R reduction within 90 days to practices and boards working through this checkpoint. Request Your Free Revenue Diagnostic to see what your first half actually cost before the second half repeats it.
Frequently Asked Questions
A denial is a claim the payer rejects outright, generating a code and a task to appeal. An underpayment is a claim the payer accepts and pays, just below the contracted rate, with no rejection code attached. Because it looks like a normal paid claim on the aging report, most practices never review it against the original fee schedule.
Pull your top five payers by claim volume, then compare 25 to 50 recent global maternity or surgical claims per payer against your contracted fee schedule. If more than one in ten claims shows a variance, the group likely has a systemic issue worth a full remittance audit rather than a one-time spot check.
Underpayment corrections typically fall under a payer’s contract dispute or reconsideration window, which is often shorter than a standard denial appeal window and varies significantly by payer and contract terms. This makes early detection more time-sensitive than denial management, since the claim already shows as closed in most systems.
An EHR improves documentation and coding accuracy, which reduces some underpayment triggers, but it does not compare remittance against contracted rates on its own. That comparison requires a billing team actively running payer variance checks, regardless of which system the practice uses.
It depends on the cause. If the claim was coded correctly and simply paid below the contracted rate, that requires a formal contract dispute or reconsideration request citing the fee schedule. If the claim itself had an error, such as a missing modifier or wrong CPT code, most payers, including Ohio Medicaid MCO CareSource, allow a corrected claim resubmission without a formal appeal, which resolves faster.
Confusing the two correction paths above is the most common reason underpayments never get recovered. A coding or modifier error goes back as a corrected claim, and no formal appeal is required. Ohio Medicaid providers can find official claims-processing and billing guidance through the Ohio Department of Medicaid provider resources here: Ohio Department of Medicaid Provider Resources .
A Subject Matter Expert in healthcare billing operations with nearly 10 years of experience, sharing insights on claims processing, coding support, and revenue cycle optimization. Dedicated to educating healthcare professionals on compliance, accuracy, and strategies to improve billing performance.
