Most small practices can tell you their denial rate. Far fewer can tell you where the money actually slips away. The patient is seen, and the note is signed. Then, somewhere between that note and the payer’s remittance, part of what the practice earned goes missing.
Sometimes it shows up as a denial. More often, though, it hides in a claim paid one level lower than billed, a charge nobody entered, or a denial that sat in a queue until the filing window closed.
This year, finding those gaps is more important than ever. In a February 2026 MGMA Stat poll, 80% of medical groups said their Medicare reimbursement falls short of the cost of delivering care. By the summer, the picture had not improved much. A June 2026 poll found 47% of groups reporting higher year-to-date revenue than in 2025, down from 56% who said the same a year earlier.
Next year looks tighter still.
In July, CMS proposed a 2027 conversion factor of $32.84 for clinicians outside qualifying APMs, a 1.68% drop from the current rate, primarily because the one-year 2.5% increase Congress provided for 2026 has expired. So when each visit is worth a little less, every visit that is under-billed or never paid hurts a little more.
Why Are Clean Claims Getting Harder?
The short answer is data. In Experian Health’s 2025 State of Claims survey, 41% of providers said more than 1 in 10 of their claims are denied, up from 30% in 2022. Nearly seven in ten said that submitting a clean claim had become harder than it had been a year earlier. When respondents were asked to name the causes, half cited missing or inaccurate claim data, 35% cited authorizations, and 32% cited registration errors.
In other words, most denials are set up long before anyone builds the claim. A coder at the end of the line cannot fix a wrong member ID or an approval that was never requested. The fixes have to happen earlier, and that is exactly where small practices tend to be stretched thinnest.
The Front Desk Is The First Leak
Intake errors are easy to write off as small stuff. Yet about a quarter of respondents in the same survey said at least one in ten of their denials could be traced back to mistakes made at check-in. A misspelled name, an old insurance card, or a secondary plan nobody asked about is enough to bounce a claim.
For specialty practices, the risk grows with time. A GI patient might have a consult in March and a procedure in May, and coverage can change in between. For that reason, eligibility should be checked again before every visit and every procedure, not just once at the first appointment.
Authorizations That Don’t Match The Claim
Prior authorization is the second-biggest gap, and it eats up staff time even when it goes smoothly. According to the AMA’s 2025 prior authorization survey, practices handle about 40 requests per physician each week, consuming 13 hours of physician and staff time. Two in five physicians employ staff who work only on prior authorizations. On top of that, only one in three physicians believes the 2025 insurer reform pledge will make a meaningful difference.
The revenue problem, however, is less about getting approvals and more about matching them.
An approval issued for one code does not cover a different code billed after the procedure. Likewise, an approval that expired two weeks before a rescheduled appointment will not protect the claim. When the authorization is in a fax folder, and the claim is in a separate billing system, nobody notices the mismatch until the denial arrives.
When The Note Doesn’t Back Up The Code
The third leak is the quietest, because the claim still gets paid.
Since October 1, 2025, Cigna’s R49 policy has allowed it to downcode visits billed as 99204-99205, 99214-99215, and 99244-99245 when it decides the diagnosis and other claim data don’t support that level. The review screens claims without looking at the medical record, and Aetna runs a similar E/M review program.
As a result, a practice can lose money on dozens of visits without a single denial appearing in its reports.
Documentation is the main defense. The note must clearly show medical decision-making or total time, and the diagnosis codes must include the comorbidities that made the visit complex. Cigna also lets physicians with five or more downcoded claims request to bypass the policy, after which it reviews a sample of their documentation.
That option only helps, of course, if someone is tracking those claims.
Procedures face their own squeeze. The 2026 fee schedule cut work RVUs and intraservice times by 2.5% for nearly all non-time-based codes, including most procedure codes. Each scope, therefore, pays slightly less, and a missed code or modifier costs proportionally more.
Charges And Modifiers That Never Reach The Claim
Take a common GI scenario. A Medicare patient comes in for a screening colonoscopy, and a polyp is found and removed. The AGA advises adding modifier PT to each CPT code in that case, and the patient owes 15% coinsurance through 2026, dropping to 10% from 2027 to 2029, and to nothing by 2030. If the modifier is missed, the claim goes out wrong, and the patient may be billed the wrong amount. Then the staff spends the next week on corrected claims and phone calls.
The same thing happens with services that were performed but never entered, such as add-on codes or a separately documented same-day E/M visit. Charge lag makes it worse. The longer the gap between the visit and the claim, the more details fade and the closer the practice gets to the payer’s timely filing limit.
This is where an integrated practice management system earns its keep. When scheduling, eligibility checks, authorizations, and charge entry sit in the same place as the chart, the claim is built from what was documented. Nobody has to re-key it from memory at the end of the day.
What Should A Small Practice Measure?
A single denial rate hides too much. Instead, track a handful of numbers every month:
- Denials by reason and by payer, so repeat problems stand out.
- First-pass acceptance rate on submitted claims
- Days from the date of service to claim submission
- Share of level 4 and 5 visits paid at the level billed
- Denials appealed versus written off.
- A/R older than 90 days
Then pick the most common denial reason and fix it at its source, whether that is the front desk, the authorization process, or the note itself. Fixing one root cause usually saves more time than working the same denial over and over.
The Bottom Line
Revenue rarely leaks at one dramatic point. On the contrary, it drips out through a wrong card at check-in, an approval tied to the wrong code, a note that undersells the visit, and a modifier nobody remembered.
With Medicare rates set to dip again in 2027 and commercial payers increasingly relying on automated claim reviews, small practices cannot afford to let those dips add up. Practices without the staff to chase every denial and underpayment can bring in medical practice revenue cycle management support that works those claims before the filing window closes. Either way, the work starts with knowing exactly where your own money is going missing.
