Denials remain a heavy burden on practices. In Experian Health’s 2026 State of Claims survey of 204 healthcare professionals, 75% said denials are increasing and 40% said denial rates exceed 10% of claims. Medical billing denial prevention works to stop the denial from occurring in the first place, as opposed to a provider having to pay a biller to pursue it. The issue at hand is that instead of focusing on being able to do appeals quicker, the focus needs to be placed on determining when, within the revenue cycle, does the claim break down. Eligibility checks, prior authorizations, documentation requirements, coding issues, claim edit failures and failed submissions each have its own failure point. Determine these failure points and identify who is responsible for each of them; denials become an operational issue which can then be solved rather than continuing to show up as a line item on your accounts receivable aging report.
Quick Answer
- Denials usually start at one of 8 checkpoints: Eligibility, Demographics, Benefits, Prior Authorization, Documentation, Coding, Claim Edits or Payer Submission.
- Eligibility and coverage problems are leading causes of denials. In Experian Health’s 2026 State of Claims survey (204 healthcare professionals), providers most often cited services not covered by insurance, and also named missing coverage information, coding errors, evolving payer policies and prior authorization issues among the leading causes.
- The prior authorization denial-reason requirement comes from CMS-0057-F, but it applies to specific “impacted payers,” not to CMS. Beginning in 2026, those payers must give a specific reason when they deny a prior authorization request (drugs excluded).
- By assigning one accountable department to each checkpoint, with a tracked KPI, you can catch many problems before claims reach the payer.
Why Denials Keep Climbing
Eligibility and registration problems are a common starting point. Front office staff should confirm eligibility for all patients at each visit. If eligibility is not checked, or is checked too far in advance of the visit date, the claim may be sent for coverage that no longer exists at the time of service, and it will be denied for lack of current coverage.
The second major concern is prior authorization. In the American Medical Association’s 2025 Prior Authorization Physician Survey (1,000 practicing physicians, surveyed in December 2025 and released in May 2026), 32% said prior authorization requests are often or always denied, and 95% said prior authorization delays access to necessary care. Prior authorization problems then show up in your denial log, often weeks later, as a missing or incorrect authorization number.
Gaps in coding and documentation round out this picture. Two denial reason codes come up often in coding and documentation work: CO-16 (the claim lacks information or has a submission or billing error) and CO-50 (the payer did not consider the service medically necessary). Both can often be prevented if the right checkpoint is in place before the claim is submitted. This is exactly why health care revenue cycle services designed around upstream review can pay dividends.
What's Changed for 2026 and 2027
The CMS Interoperability and Prior Authorization final rule (CMS-0057-F) places its requirements on specific “impacted payers,” not on CMS itself. CMS lists them as Medicare Advantage organizations, state Medicaid and CHIP fee-for-service programs, Medicaid managed care plans, CHIP managed care entities, and Qualified Health Plan (QHP) issuers on the Federally Facilitated Exchanges. The rule’s requirements do not apply to prior authorization decisions for drugs, and payers outside that list, such as employer-sponsored commercial plans and traditional Medicare fee-for-service, are not covered by it.
The operational requirements generally began on January 1, 2026. Impacted payers must send prior authorization decisions within 72 hours for expedited (urgent) requests and seven calendar days for standard (non-urgent) requests; this timeframe does not apply to QHP issuers on the Federally Facilitated Exchanges. They must also give a specific reason for every denied prior authorization decision, whether the request came by portal, fax, email, mail or phone, and publicly post certain prior authorization metrics each year, with the first set due by March 31, 2026.
Impacted payers have until generally January 1, 2027 to build the required Application Programming Interface (“API”) systems, including the Prior Authorization API, which must communicate a specific reason when a request is denied. The exact compliance dates vary by payer type.
For your billing staff, this means denial reasons from impacted payers should be more specific for non-drug prior authorization requests, which gives your team more information to act on and to avoid the same denial in the future. How much this changes your day-to-day depends on your payer mix, because payers outside the rule are not required to follow it. The rule does not change existing denial-notice requirements. For clinicians reporting to MIPS, it also adds an “Electronic Prior Authorization” attestation measure to the Promoting Interoperability category, beginning with the 2027 performance period.
The 8 Revenue Cycle Checkpoints That Stop Denials Early
Here's how the failure points map to departments, controls, and the metric that tells you the control is working.
| Checkpoint | Likely Denial | Owner | Preventive Control | KPI to Track |
|---|---|---|---|---|
| Eligibility verification | Coverage terminated or inactive | Front desk | Real-time eligibility check at scheduling and again at check-in | Percent of claims verified within 24 hours of service |
| Patient demographics | CO-16, missing or mismatched data | Front desk | ID and insurance card scan at every visit, not just new patients | Demographic error rate on rejected claims |
| Benefits verification | Service not covered under the plan | Front desk or billing | Confirm plan-specific coverage, not just active status | Benefits-related denial rate |
| Prior authorization | No auth on file or auth mismatch | Prior auth team | Auth tracking tied to scheduled procedure codes, not just visit type | Percent of procedures with confirmed auth before date of service |
| Clinical documentation | CO-50, medical necessity not supported | Clinical and coding | Documentation template capturing medical necessity language for high-denial codes | Documentation-related denial rate |
| Medical coding | Incorrect code, missing modifier | Coding team | Second-look review on high-risk CPT and modifier combinations | Coding-related denial rate |
| Claim edits (scrubbing) | Payer-specific edit failure | Billing | Automated claim scrubbing before submission, including AI-assisted edit checks | First-pass clean claim rate |
| Payer submission and analytics | Timely filing or resubmission error | Billing management | Weekly denial trend review by CARC code and payer | Denial rate trend, month over month |
This table can be the backbone of your actual medical billing denial prevention strategy. Because this chart compels you to make decisions as to which party has control over every potential denial issue prior to the claim leaving your practice. The two that should receive additional focus would be coder reliability, because certified medical coding services provide value for money when there is a second pair of eyes reviewing modifier-heavy claims that your scheduler cannot detect. Claim scrubbing is also an area in which some medical billing offices are beginning to use artificial intelligence (AI) medical billing systems to help identify specific payer edits they may have missed by a person.
What This Means for Patients
Denials do not only hurt your business financially. The Commonwealth Fund’s 2025 Affordability Survey (4,589 privately insured adults ages 19 to 64), reported by AHA News in June 2026, found that 21% said they or a family member were denied coverage for doctor-recommended care in the past year: 13% had a prior authorization denial, 8% had a claim denial, and 1% had both. Among people with a prior authorization denial, 41% said it delayed their care and 28% said a health problem worsened. Among people with a denied claim, just under half (47%) appealed.
Prevention is better than an appeal. A rejection at the eligibility level will never be a delayed MRI or a patient giving up on treatment.
What Should Your Practice Do Now?
Begin with the most likely checkpoint for the fastest wins – typically it will be the first checkpoint at or near the main entrance.
- 1. Audit the previous ninety (90) days’ denials by CARC Code and organize them in order from Checkpoint One through Eight (8), not by Payer.
- 2. Designate an individual as the "owner" for each of the eight (8) checkpoints listed above; in a smaller office or practice, one person may cover two positions.
- 3. Incorporate a Same-Day Eligibility check into the patient’s scheduling process (not simply when they arrive on their scheduled date).
- 4. Create a standardized documentation template for your top five (5) denied CPT Codes.
- 5. Review your current denial trends on a weekly basis (versus monthly). It can take less money/time/cost to correct an issue that you identify during Week 1 rather than Month Three.
Sources and Last Reviewed
Last reviewed: November 2, 2026. Each statistic reflects the survey, sample and year named in the text. Re-check the sources before relying on a figure, because new surveys are published often.
- CMS: Interoperability and Prior Authorization Final Rule (CMS-0057-F) fact sheet
- AMA: 2025 Prior Authorization Physician Survey (May 2026)
- Commonwealth Fund: How Health Insurance Coverage Denials Affect Americans (June 2026)
- AHA News: Survey finds 1 in 5 privately insured adults reported coverage denials (June 4, 2026)
- Experian Health: 2026 State of Claims survey (October 28, 2026)
Frequently Asked Questions
Denial prevention is the process of eliminating errors in the claim processing cycle (eligibility, authorization, document, code and submit) prior to submitting claims to payers for reimbursement.
Surveys name several leading causes, and the ranking varies. In Experian Health’s 2026 State of Claims survey (204 healthcare professionals), providers most often cited services not covered by insurance; missing coverage information, coding errors, evolving payer policies and prior authorization issues also ranked among the leading causes. Many of these problems start at registration and eligibility, before the claim is built.
Beginning in 2026, the CMS rule requires “impacted payers” to give a specific reason for each denied prior authorization request, other than for drugs. Impacted payers are Medicare Advantage organizations, state Medicaid and CHIP fee-for-service programs, Medicaid managed care plans, CHIP managed care entities, and Qualified Health Plan issuers on the Federally Facilitated Exchanges. Payers outside that list are not covered by the rule. Where it applies, specific reasons can help you track and act on denial trends across your practice.
No. While many small practices elect to complete all eight checkpoints internally, many small practices find it cost effective to contract third-party vendors for coding compliance, claim scrubbing and denial trend analysis.
Medical Billing Denial Prevention is not something you complete. Rather it is an ongoing series of checkpoints to monitor because changes occur within Payer Edits as well as Coding Rules on an annual basis. Human Medical Billing includes all eight of the Checkpoints in Client Workflows, along with Denial Management Services for those Claims that are denied despite all other steps. If you would like more details about how we can help you improve your work flow using any of the individual Checkpoint Steps, please visit the Human Medical Billing Xpert Billing Blog where we provide greater detail about each Step.
Contact Human Medical Billing to schedule a compliance readiness review or learn more about our end-to-end billing and regulatory support services.
