Revenue leakage in healthcare cost U.S. hospitals more than $48 billion in 2025, up from $38.6 billion in 2024, according to Kodiak Solutions' March 2026 analysis of more than 2,300 hospitals. The losses came from final payer denials and uncollected patient balances. The money was earned and never arrived. At an illustrative 4% leakage rate, a practice collecting $2 million annually loses $80,000. This guide explains what revenue leakage is, where it hides, what it costs and how to stop it.
What is revenue leakage?
Revenue leakage is the gap between what a provider earns for delivering care and what the provider collects. Some of that gap is unavoidable bad debt from patients who cannot pay. Much of it is preventable, lost to errors, process gaps or missed follow-up. The Healthcare Financial Management Association (HFMA) published an article putting hospital losses at about 3% to 5% of net revenue each year.
Revenue leakage in healthcare can occur at every stage of the revenue cycle: registration, coding, claim submission, payment posting and collections. Small per-claim errors compound across hundreds of claims. A $12 underpayment on one claim is easy to ignore. The same gap across 2,000 claims a year is $24,000. Leakage hides in volume.
Causes of revenue leakage in healthcare
Revenue leakage in healthcare rarely has one source. It builds from small failures at each handoff and the table shows where they sit.
Leakage cause | How it happens | Scale or cost |
Denials not reworked | Denials that nobody works past the appeal deadline. Up to 65% of denied claims are never resubmitted (HFMA, citing a 2018 analysis) | More than $48 billion lost by U.S. hospitals to final denials and bad debt in 2025 (Kodiak) |
Underpayments accepted | Payer pays below the contract rate and nobody compares the electronic remittance advice (ERA) with the fee schedule | 1% to 3% of net revenue (Becker's Hospital Review) |
Missed charge capture | Services are performed but never documented, coded or billed | As much as 1% of potential net revenue for hospitals (HFMA) |
Eligibility and registration errors | Claim goes to the wrong payer or for lapsed coverage | Nearly 27% of denials; about $25 to rework one claim (Medical Group Management Association (MGMA), 2021) |
Coding errors | Undercoding, unspecified diagnosis codes and missing modifiers | Lower payment on undercoded claims; denials on mismatched codes |
Credentialing gaps | Provider is not credentialed with the payer, so claims deny automatically | Every claim under that provider is at risk until enrollment clears |
Patient balance write-offs | Patients owe more but pay less of it. Patient responsibility rose to 7.3% of net revenue in 2025 (Kodiak) | Collection of the patient share fell from 45.1% in 2024 to 42.4% in 2025 |
Timely filing misses | Claim or appeal reaches the payer after the deadline | Full loss of the claim |
Revenue leakage examples: what it looks like in practice
The four scenarios below are illustrative. The dollar amounts are round numbers chosen to show the math.
Example 1: an underpayment hiding in a paid claim. A payer owes $130 under your contract for CPT (Current Procedural Terminology) code 99214. It pays $118. Nobody checks. That $12 gap repeats on 600 claims a year, for an annual loss of $7,200. The claim shows as paid in your system but it is not paid in full.
Example 2: a missed charge on a multi-service visit. A patient receives a level 4 evaluation and management (E/M) visit plus an in-office procedure. The biller codes the E/M visit and misses the procedure. A $275 charge never reaches the payer. At 10 missed charges a month, the practice loses $33,000 a year.
Example 3: a denial nobody appeals. A claim adjustment reason code (CARC) 197 denial, which signals missing precertification or authorization, sits in the queue. The authorization exists but the claim was never linked to it. The $1,200 claim goes untouched and gets written off. X12 maintains the CARC list.
Example 4: a credentialing lapse. A new provider starts seeing patients before credentialing finishes with two commercial payers. Six weeks of claims, about $45,000, deny. By the time enrollment clears, the timely filing window for the earliest claims may have closed.
Underpayments in medical billing
Underpayments are the quietest form of revenue leakage in healthcare. A denied claim is visible. An underpaid claim looks like a payment and shows up as collected revenue, even though it falls short of what the contract owes.
A Becker's Hospital Review webinar summary, produced in collaboration with Ensemble Health Partners, states that providers lose 1% to 3% of net revenue each year to commercial payer underpayment. Treat it as a planning range, not a precise rate.
Catching underpayments takes a dedicated workflow. Compare the allowed amount on every ERA with your contracted rate for that CPT code, modifier and place of service. Flag any variance and route it to a reconciliation queue, not the standard denial queue. Recheck rates after each contract renewal or annual fee schedule update, because stale rates in a payer's system often drive repeat variances. Strong account receivable management catches these gaps before they age out of the appeal window.
Missed charges in medical billing
A missed charge is a service performed but never billed. It does not appear as a denial because no claim reflects it, so it stays invisible on standard denial and aging reports. HFMA's charge capture guidance estimates that hospitals lose as much as 1% of potential annual net revenue this way. On $500 million in net revenue, that is $5 million.
Charge capture failures typically occur at three points. First, the provider documents the service, but the coder misses it. Second, the provider performs a service and never documents it. Third, ancillary services such as labs, imaging and supplies never reach the billing system. HFMA also points to late updates to the charge description master (CDM) and unclear charging policies.
Practices with a dedicated medical coding review catch many of these at the coding stage. The coder compares clinical documentation with the encounter and confirms that each billable service has a code.
Revenue leakage in medical billing: where it hides
Medical billing revenue leakage, like other revenue leakage in healthcare, also hides in places few teams check routinely. Teams overlook four of them most often.
- Contractual adjustments taken incorrectly. When a payer pays less than billed, the system posts a contractual adjustment. If the adjustment exceeds what the contract allows, the difference is leakage. Many systems post adjustments automatically without comparing them with the fee schedule.
- Secondary insurance not billed. Bill the secondary payer after the primary processes. If your system does not generate secondary claims automatically, that revenue sits uncollected. Coverage discovery can find active secondary coverage the patient did not report.
- ERA posting errors. A payment posts to the wrong patient or the wrong date of service. The original claim shows as unpaid and the misposted payment inflates another account. Both accounts are now wrong.
- Write-offs taken too early. A denial gets written off before anyone checks whether it was correctable. Some write-offs are legitimate. Many are not, which is why the prevention steps below include a second review.
How to prevent revenue leakage
Preventing revenue leakage typically costs less than recovering it, because a dollar caught before it leaks never needs an appeal. Six habits do most of the work.
- Verify eligibility before every visit. Run a real-time check at scheduling and again at check-in. MGMA's denial data lists registration and eligibility as the top denial reason, at nearly 27% of denials. How many of your denials start at the front desk?
- Audit payments against contracts monthly. Pull your top 20 CPT codes by volume for each major payer. Compare the ERA allowed amount with the contracted rate. Flag any variance above 2%.
- Work every denial within 48 hours. A denial that sits for 30 days is harder to fix and closer to the filing deadline. Assign follow-up to a named person or team, so it does not compete with check-in and phone duties.
- Reconcile charges against encounters. Compare daily patient encounters with claims submitted. A consistent gap means charges are slipping through.
- Track credentialing expirations. Set reminders 90 days before every deadline. A lapsed credential can deny every claim under that provider's National Provider Identifier (NPI) until it is fixed, so keep a tracker for medical credentialing.
- Review write-offs before finalizing them. Require a second review on any write-off above $500. Check the denial code, confirm whether the appeal window is open and decide whether the denial is correctable.
Healthcare revenue leakage benchmarks
These metrics show whether revenue leakage in healthcare is hurting your practice. The targets are working guidelines, not published standards. Ranges vary by specialty and payer mix, so set your own baseline first. The HFMA MAP Keys define how to calculate most of these metrics consistently.
Metric | Suggested target | What a miss signals |
Net collection rate | 96% or higher | Below 94% suggests systematic undercollection |
Denial rate | Under 10% | Above 10% means too many claims fail on first pass |
Accounts receivable (AR) over 90 days | Under 20% of total | High aging points to unworked denials |
Days in AR | Under 40 days | Rising days mean revenue is moving slower |
Clean claim rate | 95% or higher | Below 90% means heavy rework |
Underpayment rate | Under 1% of net revenue | Above 2% suggests payers pay below contract |
Charge capture rate | 98% or higher of documented services billed | Below 95% means services go unbilled |
Write-off rate | Review any write-off above $500 | A high rate without denial analysis may hide leakage |
Where does your denial rate sit against these targets? The answer tells you which prevention habit to start with.
Frequently asked questions
What is revenue leakage in healthcare?
How much revenue do healthcare providers lose to leakage?
What are the most common causes of revenue leakage?
What is the difference between revenue leakage and bad debt?
How do underpayments cause revenue leakage?
What are missed charges in medical billing?
How can a practice prevent revenue leakage?
Should a practice outsource to prevent revenue leakage?
Where to start
Revenue leakage in healthcare comes from many small, preventable failures. Most hide in paid claims, unbilled services and unworked denials. Measure first, then fix the largest gap.
Pull three reports: denial rate by CARC code, net collection rate by payer and AR aging by bucket. If net collection is below 96%, start with underpayment audits on your top five CPT codes. If your denial rate is above 10%, focus on the top three CARC codes by volume. If AR over 90 days exceeds 20%, the problem is likely follow-up capacity.
Medbilling RCM physician billing services track results by payer and CARC code and focus on underpayments, missed charges and unworked denials before they become write-offs.
