ArticlesFor practices

For practices

What to Ask a Billing Company About Underpayments

When deciding what to ask a billing company about underpayments, a practice should focus on contract rate verification, fee schedule alignment, and the underpayment appeals process. Practices must confirm if paid claims are checked against contracted rates, how shortfalls are flagged, and who holds responsibility for recovering the missing revenue.

By Noah LuciaDaybook Health5 min readUpdated October 12, 2026
What to Ask a Billing Company About Underpayments
On this page

NoteEditorial Disclaimer: This article is for informational purposes regarding revenue cycle management and does not constitute financial, legal, or clinical advice.

Why must practices ask a billing company about underpayments?

A practice must explicitly ask a billing company about underpayments because short payments bypass standard denial workflows. A denied claim triggers a reason code, but a short-paid claim posts a partial payment and adjusts the remaining balance to zero as a contractual obligation. Without a direct comparison between the allowed amount and the contracted rate, line by line, posting processes treat a short payment exactly like a correct one.

Because the denial work most billing companies are measured on (target: denial recovery) prioritizes rejected claims, re-adjudicating paid claims often falls out of scope. Billing companies are commonly measured on total denials and days in accounts receivable. Identifying a short payment review requires exact payer contracts, which billing companies frequently lack in full.

Does the billing company verify paid claims against the payer contract fee schedule?

The primary question is whether the billing company re-adjudicates paid claims against the practice's contracted rates. Practices need specific answers regarding which payers and which claims receive a short payment review. A billing company might check every paid claim, sample claims quarterly, review only loaded fee schedules, or omit the process entirely.

If a billing company checks every claim, they should provide an on-demand report of the findings. If they only sample claims, it usually indicates that their systems cannot support line-by-line contract rate verification. Clear answers establish exactly where revenue leakage might occur.

Which contract version is used for contract rate verification?

A practice must ask which version of each payer contract fee schedule the billing company actively uses. Checking claims against outdated rates misses every short payment caused by a rate increase how a payer loads a contract into its claims system (target: TPA claims adjudication) failed to process.

Practices should compare their own signed contracts and amendments against the billing company's records. Often, the practice holds recent amendments the billing company never received. The goal is establishing a single, agreed-upon rate history per payer that both parties update simultaneously.

How does the billing company identify and record a short payment review?

Practices need to know precisely how a short payment is flagged and recorded within the shared practice management (PM) system. The ideal workflow flags the shortfall directly on the claim, citing the specific contract line it violates. If findings exist only in external spreadsheets, practices lose visibility.

This question must also address payment posting. When a remit includes a short line, the posting process might absorb the difference into a contractual adjustment, rendering the shortfall invisible in aging reports. Alternatively, it can hold the shortfall as an active balance the payer still owes.

Who manages the underpayment appeals process?

Practices must establish who at the billing company decides and files (target: onshore RCM) when an underpayment is identified. If a billing company manages standard appeals, the underpayment appeals process should align with a practice-approved financial threshold.

A strong underpayment appeal cites the exact contract section and fee schedule line, attaches the remit, shows the calculation, and demands a specific dollar amount. Practices should request a sample appeal packet to verify this standard. Furthermore, a single unloaded rate at a payer repeats on every claim until fixed at the source, making pattern tracking essential.

What options exist if outsourced billing oversight misses underpayments?

When outsourced billing oversight does not include underpayment reviews, practices face a scoping decision. This is not inherently a performance failure, but a gap requiring a structural solution.

ApproachHow It WorksTrade-offs
Billing Company ExpansionBilling company adds re-adjudication to their contract.Requires renegotiation; highly dependent on the vendor's software capabilities.
Point Solution IntegrationAI/software reads remits in the PM, flags shortfalls, and drafts appeals.Lightweight; billing company gains ready-made appeal packets without workflow disruption.
Accepting the GapPractice assumes the financial loss of short payments.Zero operational changes; highest risk of long-term revenue leakage.

How does Daybook Health support billing company underpayments?

Daybook Health integrates seamlessly into existing RCM workflows, whether managed in-house or through a vendor. Daybook re-adjudicates every paid claim line-by-line against the practice's contract using the remits already landing in the PM system. Shortfalls are placed directly on the claim, and Daybook drafts a complete appeal, with the contract line and remit attached, into the billing company's queue.

Daybook does not run a billing company and does not compete with outsourced partners. Instead, it provides the same agents a billing company can run for every client (target: agentic RCM). Pricing is usage-based per claim adjudicated, requiring no subscription.

Frequently asked questions

What is the difference between a denial and an underpayment?
A denial is a completely rejected claim returned with a specific reason code. An underpayment occurs when a payer processes and pays the claim, but at an amount lower than the contracted fee schedule.
Why do billing companies miss underpayments?
Most billing software is designed to catch zero-balance denials rather than partial payments. Identifying underpayments requires line-by-line contract rate verification, which is impossible if the billing company lacks the fully amended contract.
How should an underpayment appeal be formatted?
An effective underpayment appeal must cite the exact contract section and fee schedule line. It should also attach the remit, detail the mathematical calculation of the shortfall, and explicitly request the missing dollar amount. ---
Daybook

Find what payers
still owe you

Book a 20-minute call. Bring one paid claim that looks short, and we will show you what Daybook finds in it, inside the RCM workflow you already run.