What is claim denial rate? In simple terms, a claim denial rate is the percentage of medical claims rejected by payers on first submission. The industry average is 9.5% — best-in-class practices keep this under 4%.
How to calculate your denial rate
The denial rate formula is straightforward. Take the number of claims denied by a payer in a given period, divide it by the total number of claims submitted in that same period, then multiply by 100.
Denial Rate = (Denied Claims ÷ Total Submitted Claims) × 100Example: 95 denied ÷ 1,000 submitted × 100 = 9.5% denial rate
Run this calculation monthly to track trends and catch problems early before they compound into serious revenue loss.
Industry benchmarks
Knowing where you stand against the medical billing denial rate benchmark is the first step to improving. Here’s how the healthcare denial rate average breaks down:
If your rate sits above 9.5%, there are likely systemic issues costing you real revenue every single month.
What causes a high denial rate?
Most denials don’t happen at random. Common culprits include:
- Eligibility errors: Coverage wasn’t verified before the visit.
- Coding mistakes: Wrong CPT or ICD-10 codes, or missing modifiers.
- Missing prior authorizations: Services rendered without required approval.
- Duplicate claims: Submitting the same claim more than once.
- Timely filing failures: Claims submitted after the payer’s deadline.
- Incomplete documentation: Notes don’t support the billed diagnosis or procedure.
A single root cause can account for hundreds of denials per month. Identifying it quickly is key to getting your denial rate under control.
How to start reducing yours
Small, consistent process improvements compound fast. Practices that address the top three denial reasons typically see their rate drop within 60–90 days.
When to get help
If your denial rate has been above 10% for more than two consecutive months, or if your team is spending more time on rework than on new submissions, it’s time to bring in a billing specialist or consider a managed RCM service. The cost of professional support is almost always lower than the revenue you are leaving on the table. A targeted denial management review can identify your highest-impact fixes within the first week.