How to avoid hospital claim denials: six essential practices

Hospital claim denials can often seem like an inevitable event, a margin of loss inherent to hospital management. They are not. Most of the denials that reach the billing department are the result of failures that should be prevented with protocols, training and technology.

Hospitals that are members of the National Association of Private Hospitals (Anahp) ended 2024 with an average managerial initial denial rate (denials that can still be appealed) of 15.89% of revenue. By the end of the appeal cycle, however, only 1.96% remained as a final loss, according to the Anahp Observatory 2025.

The gap between the two figures is no cause for relief. On the contrary, it shows that hospitals spend time, staff and money appealing denials that should never have been generated. Most of that initial 15.89% stems from failures within the revenue cycle itself, such as registration errors, missing authorizations and incorrect coding.

This article presents six essential practices to reduce the hospital denial rate, focusing on what should be done before the claim is sent to the payer.

Why prevention is more efficient than appeals

Appealing a denial takes time, additional documentation and a team capable of preparing well-founded technical justifications. Even when the appeal succeeds, the hospital has already lost the time between the payment cut and the reversal, a period in which the revenue was out of its cash flow. Besides, not every appealed denial is reversed. Even a 1% denial rate can mean R$ 1 million in lost revenue.

Prevention acts before this cycle begins. A claim submitted correctly, with complete documentation and coding that complies with the payer’s contract rules, does not generate a denial. There is no appeal cost, no delay in payment and no risk of final loss.

The data reinforce this logic. Hospitals that automate claim verification before submission achieve a 95% XML acceptance rate, compared with 60% in manual operations, according to Rivio data. The 35-percentage-point gap represents claims sent back for correction, payment delays and correction processes that could have been avoided.

To understand the impact of denials on the hospital revenue cycle, see the article Claim denials: what they are and how to avoid them.

Where denials originate

Before preventing, you need to know where to act. Hospital denials have three most frequent points of origin, all of them before billing.

The first is the start of the cycle. Unverified eligibility, missing or incorrect authorization and wrong registration data at admission account for a significant share of administrative denials. Errors made at this stage reach billing weeks later, when correcting them already requires rework.

The second is the care record. Incomplete medical records, generic nursing progress notes and reports without a precise description of the procedures performed compromise coding and result in clinical denials. The payer refuses payment because the documentation does not prove what was charged.

The third is billing and coding. Coding errors, items charged without documentary support or claims submitted after the contractual deadline generate technical and administrative denials that could have been identified before submission.

For a complete map of the causes, see the article Main causes of claim denials: how to identify and resolve them.

How to avoid hospital claim denials: six essential practices

The practices below act directly on the three points of origin described. Rather than implementing each one independently, it is essential to combine them all as part of an ongoing institutional process.

1. Verify eligibility and authorization before care

Eligibility verification confirms that the patient has active coverage for the requested procedure under the current plan. Authorization verification confirms that the payer has approved the procedure, with the correct code, the correct quantity and within the validity period.

These two checks need to happen before care, not after. A checking protocol at admission, with mandatory fields for each payer, reduces the most frequent source of administrative denials. To understand how authorization errors affect billing, see the article Authorization errors: a major risk for oncology.

Normative Resolution No. 623/2024 of the ANS (Brazil’s National Supplementary Health Agency), in force since July 2025, sets maximum response times for health plans to answer authorization requests, which allows the hospital to plan its request workflow with adequate lead time.

2. Standardize the care record

The medical record is the main evidence supporting the hospital’s payment. Vague or incomplete records leave room for the payer to question the consistency between what was authorized and what was performed.

Standardizing the record defines, by type of care and by specialty, which fields must be filled in and at what level of detail. Medications administered with dose and time, materials used with specifications, procedures with a technical description and complications documented as they occur are the elements that support the hospital claim when the payer audits it.

3. Review the claim before submission

The pre-submission check is the last barrier before a claim with errors reaches the payer. At this stage, the billing department verifies procedure coding against the current tables (TUSS, CBHPM, AMB), consistency between the items authorized and the items charged, completeness of documentation and compliance with contractual deadlines.

A checklist for each payer, with the specific criteria of each contract, standardizes this stage and reduces dependence on each billing specialist’s individual knowledge. That way, what is documented in the protocol does not depend on who is on shift.

4. Monitor contractual deadlines by payer

Each payer has specific deadlines for submitting claims, appealing denials and receiving supplementary documentation. Missing any of these deadlines can result in a denial or the loss of the right to appeal, regardless of the quality of the claim.

Monitoring these deadlines needs to be systematic and automated whenever possible. A technically perfect claim submitted after the contractual deadline can be refused for purely administrative reasons. Deadline control is one of the lowest-cost, highest-impact preventive practices for the denial rate.

5. Classify and analyze the denials received

The denials that come in reveal where the process is failing. Classifying each denial received by type (administrative, technical, clinical), by payer and by department of origin turns an individual problem into management data.

With this mapping, the hospital identifies patterns: if 60% of a payer’s denials are for incorrect coding, the problem lies in the billing process for that specific contract. If clinical denials are concentrated in one department, the problem lies in that team’s recording standard. Without classification, the hospital appeals denials one by one without ever resolving the cause behind them.

6. Use technology to automate verification

The volume of rules, deadlines and specific criteria for each payer makes manual verification prone to failure. Systems that automatically cross-check medical record data against the payer’s contract rules identify inconsistencies before the claim is submitted, when they can still be corrected at no additional cost.

Automating pre-submission verification is the factor that most sets hospitals with a low denial rate apart from the rest. The 95% XML acceptance rate achieved with automation, compared with 60% in manual operations, directly reflects this difference. Every additional percentage point in the acceptance rate means claims paid on time, without rework and without impact on cash flow.

Denial prevention as institutional policy

Reducing the hospital denial rate is not a task the billing department can carry out on its own. The most frequent causes of denials occur at admission, in the care record and in authorization, all stages that involve other areas. Efficient prevention requires each area to understand its role in the revenue cycle and work with the same level of rigor as billing.

This requires a shift in institutional perspective: the medical record is not just a clinical document, it is the basis for payment. Authorization is not a bureaucratic formality, it is the condition for the service to be paid. Registration at admission is not a minor administrative step, it is the foundation of the entire hospital claim.

From this perspective, technology lets teams carry out each stage more precisely, identifies errors before they become denials and frees the billing team to focus on the appeals that truly require human analysis.

From audit to payment, Rivio’s technology analyzes clinical records, cross-checks information against hospital claims, identifies and corrects denials, submits the XML and manages denial appeals, all automatically. With Rivio, hospitals and clinics leave the bureaucracy to AI and can focus on what really matters: caring for the health of the Brazilian population.

FAQ - frequently asked questions about hospital claim denials

What causes hospital claim denials?

Hospital denials have three main origins: failures at the start of the revenue cycle (unverified eligibility, missing or incorrect authorizations, wrong registration data), insufficient clinical documentation in the medical record and coding errors or late submission in billing. Most denials arise before the claim is sent to the payer, at stages where prevention is more efficient than a later appeal.

What is the difference between a denial and a denial appeal?

A denial is the payer’s full or partial refusal to pay. A denial appeal is the formal challenge the hospital files to try to reverse that refusal, with supplementary documentation and technical justification. An appeal is needed when the denial has already occurred; prevention acts earlier, keeping the denial from happening.

How can a hospital reduce its denial rate?

The actions with the greatest impact are: eligibility and authorization verification before care, standardization of the care record, claim review before submission, monitoring of contractual deadlines by payer and systematic classification of the denials received. Automating pre-submission verification is the factor that most sets hospitals with a low denial rate apart from the rest.

Can hospital claim denials be avoided completely?

Eliminating denials completely is a feasible goal with well-structured processes and the right technology. The Rivio platform offers a contractual guarantee of an average final denial rate of 0% (guaranteed by contract), compared with an average of 3.5% at hospitals without the platform. In practice, what determines an institution’s denial level is the quality of its processes at every stage of the revenue cycle, from scheduling to payment.