Do the math
This post is specifically about denial workflows and follow-up. If you want the broader collections picture, see billing-collections-gap.
A clinic bills $3M per year. The denial rate is 10%, which is about average for outpatient practices. That is $300K in denied claims.
Industry estimates suggest that up to 65% of denied claims are never resubmitted. At this clinic, that means $195K in claims that were denied, set aside, and never touched again.
$195K. Not from bad medicine. Not from losing patients. From paperwork that someone put in a pile and forgot about.
At a 3-location practice doing $5M, the same math produces $325K in abandoned claims. That is more than most clinic owners pay themselves in a year.
Where denials go to die
The process failure looks the same in almost every clinic we audit.
A denial comes back from the payer. It lands in the billing queue. The billing staff member sees it, but they are already working on 40 new claims from this week. The denial needs research. It needs a corrected code, a missing modifier, an authorization number. That takes time.
So it sits.
New claims keep coming in. New denials keep coming in on top of old ones. The pile grows. After 30 days, the billing person glances at it but has more urgent work. After 60 days, someone flags it during a report review. After 90 days, the timely filing deadline passes. The claim is now dead. The revenue is gone forever.
Nobody made a decision to abandon that money. It just happened because the process was not built to prevent it.
In some practices, the denial does get "touched." Someone opens it in the system, reads the denial reason, and closes it. The system logs it as worked. The report shows the denial was addressed. But no corrected claim was submitted. No appeal was filed. The activity was logged, but the money was never recovered.
This is one of the most expensive process failures in healthcare, and most clinic owners have no idea it is happening.
Which denials are actually fixable
Not all denials are created equal. When we break down the denial reasons across the practices we work with, the pattern is clear: most denials are clerical, not clinical.
Eligibility and coverage issues. The patient's insurance was entered wrong, the coverage lapsed, or the wrong subscriber ID was used. This is almost always a data entry error at registration. Fix the information, resubmit the claim. Recovery rate: very high.
Prior authorization issues. The service required authorization and it was not obtained, or the authorization number was not included on the claim. Sometimes fixable if you can get a retroactive auth. Sometimes not. But you have to try.
Coding errors. Wrong CPT code, missing modifier, diagnosis code that does not support medical necessity for the procedure billed. These are almost always fixable. Correct the code, resubmit. This is the most common denial category we see, and the one most likely to be sitting in someone's pile.
Duplicate claims. The system submitted the claim twice, or it was submitted to the wrong payer and then corrected but the original was also processed. Fixable with a phone call or a corrected claim.
Medical necessity. The payer says the service was not medically necessary based on the diagnosis. This is the hardest category. It requires clinical documentation to support an appeal. But even here, the appeal success rate is higher than most people think when the documentation exists and someone actually files the appeal.
We see the same breakdown across specialties. Roughly 60-70% of denials fall into the first four categories. These are fixable claims. They just need someone to fix them.
What a real denial management process looks like
The clinics that keep their denial rates low and their recovery rates high all do the same things. None of it is complicated. It is just disciplined.
Touch every denial within 48 hours. Not "look at it." Work it. Identify the reason, determine the fix, and either resubmit the corrected claim or flag it for appeal. If it cannot be resolved in 48 hours, it goes on a tracked follow-up list with a deadline.
Categorize by reason code. Every denial gets tagged with the root cause. Eligibility. Auth. Coding. Duplicate. Medical necessity. Other. You cannot fix patterns you cannot see.
Track appeal rates and outcomes. How many denials were appealed? How many appeals were won? What is the dollar amount recovered through appeals? If you are not tracking this, you have no way to know whether your denial management is working.
Know your denial rate by payer. If Blue Cross denies 15% of your claims but Aetna denies 6%, that tells you something. Maybe your Blue Cross contract has different auth requirements you are missing. Maybe their edits are catching coding patterns that other payers accept. Either way, you need to know.
Review the aging denial report weekly. Any denial over 30 days old without activity is a red flag. Any denial approaching the timely filing limit is an emergency.
Most clinics have none of this. They rely on their billing company to "handle denials," but they have no visibility into what that actually means. The billing company says denials are being worked. The write-off report tells a different story.
A real example
We started working with a mental health practice (anonymized Sorso client, Pacific Northwest, three locations, about $3.2M in annual revenue). The billing company's reports looked solid. Collection rates in the mid-90s. The owner was confused because revenue was up, patient volume was up, but her bank account was not reflecting any of that growth.
When we pulled the data and reconciled billing with bank deposits, we found about $17K per month in leaked revenue. A significant chunk of that was unworked denials.
Here is what we found specifically: denials were being logged as "reviewed" in the billing system, but corrected claims were not being resubmitted. Authorization denials were being written off instead of pursued for retroactive auths. Coding denials on group therapy sessions were piling up because nobody had updated the billing templates to match the payer's current requirements.
The billing company's collection rate calculation excluded written-off denials from the denominator. So their 94% rate was technically accurate by their math, but it did not reflect the $204K per year that was falling through the cracks.
None of this required a new billing system. It required a process that tracked denials from receipt to resolution, and someone who verified that resolution meant money collected, not just a note in the system.
What to do right now
If you have never looked at your denial management process in detail, start here.
Find out your denial rate. Ask your billing company for the percentage of claims denied on first submission. If they cannot tell you, or if they have to "run a special report," that is your first warning sign. This should be a number they know off the top of their head.
Pull a report of denials over 30 days old. How many are there? What is the total dollar amount? How many have been reworked versus written off? This report will tell you more about your revenue health than any P&L statement.
Check your write-off report for the last 6 months. How much was written off as "uncollectible" that was actually a denied claim? Write-offs should be a last resort after genuine collection efforts. If denials are being routed straight to write-off, money is being thrown away.
Ask one question in your next billing meeting: "Of the denials we received last month, how many were resubmitted, and how much did we collect from those resubmissions?" If nobody can answer that, you have a denial management problem.
The 65% figure does not have to apply to your practice. But you have to build a process that prevents it. And the first step is knowing where you stand right now.
If you want us to map your denial patterns and find what is recoverable, take the free assessment. It takes 15 minutes and gives you a financial scorecard for your practice.
