Facing Medical Necessity Denials: A Registered Nurse's Perspective

RCM Services March 2026· 8 min read

Author: Jennifer Munguia, with assistance from RN’s Stephanie Rippe and Casey Barroso

Medical necessity denials are a persistent challenge in healthcare, often leading to significant delays in patient care and increasing administrative burden. Registered nurses (RNs), particularly those involved in clinical appeals, face unique difficulties when navigating these denials. With their direct patient care experience, they play a pivotal role in the appeals process, working to overturn payer decisions that are perceived as unjust or based on insufficient documentation. This paper examines several key areas of concern from an RN’s perspective regarding medical necessity denials, including payer policies, administrative language, coding accuracy, and collaboration between departments.

Payer Policy and Criteria: Navigating Complexity

One of the most significant challenges RNs face in the appeal process is understanding and navigating the complex, often ever-changing payer policies and criteria. Health insurance payers frequently update their guidelines and documentation requirements, making it difficult for RNs to stay up to date.

UnitedHealthcare (UHC): Updates major policies quarterly; minor updates or coding edits can occur monthly.
Blue Cross Blue Shield (BCBS) Affiliates: Most regional BCBS plans update annually for major policy changes, with monthly or as-needed updates for coding, prior authorization, or claim edits.
Aetna: Publishes policy updates quarterly; minor updates (e.g., CPT/ICD changes) can happen monthly.
Cigna: Major coverage policies reviewed and updated annually, with interim updates as needed.
Humana: Annual policy updates, with monthly or ad-hoc edits for coding or PA requirements.
Medicare / Medicare Advantage:

Medicare Administrative Contractors (MACs) update Local Coverage Determinations (LCDs) typically every 12 months, though interim updates can happen for urgent clinical or coding issues.
National Coverage Determinations (NCDs) are updated as needed, sometimes multiple times per year.

Policies are not only complex but also unstandardized across different payers, requiring RN appeal writers to adapt to varying procedures for each insurance company.

For example, prior authorization (PA) requirements differ from payer to payer, as do the criteria used to determine whether a service is considered medically necessary. These discrepancies create confusion and administrative burdens, as RNs must review multiple portals and prior authorization (PAR) forms for every payer involved. Furthermore, discrepancies in these documents often lead to denied claims, necessitating a thorough appeal process to ensure that services rendered are recognized as medically necessary.

Contract Language and Administrative Denials: The “Extenuating Circumstances” Appeal

Contract language also plays a significant role in medical necessity denials, particularly when administrative denials occur. Insurance contracts often include provisions that allow for an appeal in cases of “extenuating circumstances,” but the application of these provisions is not always clear. RNs may encounter situations where a medical necessity appeal is denied due to an administrative issue, such as missing prior authorization, even though the clinical documentation supports the necessity of the care provided.

In cases like these, RNs must explore the possibility of appealing the denial under the “extenuating circumstances” clause. However, as the payer may argue that no authorization was obtained, the RN appeal writer is tasked with uncovering the reason behind the missed authorization. This process can be incredibly frustrating, especially if the physician or surgeon did not document the rationale for the procedural change in the clinical record. As a result, the RN may find themselves “hunting and pecking” through notes that were not intended to capture this information, leading to inefficiencies in the appeal process.

The Role of Clinical Documentation in Appeals

Clinical documentation is crucial in the appeal process, as it forms the foundation of any medical necessity argument. However, RN appeal writers often face difficulties in gathering sufficient and accurate documentation. Clinical notes may be incomplete, poorly organized, or buried in places that would not be the logical location for specific details. As a result, RNs must spend a significant amount of time reviewing patient records and gathering the necessary documentation to craft an effective appeal letter.

Effective communication between clinical teams is essential in addressing these challenges. Front-end colleagues and departments can play a pivotal role in preventing denials by providing clearer and more comprehensive documentation. RNs involved in the appeals process would greatly benefit from providing feedback to these teams, helping them better understand what information is necessary to avoid denials in the first place.

Prior Authorization Denials: A Frustrating Cycle

One of the most frustrating types of medical necessity denials that RNs encounter are prior authorization (PA) denials. Often, a PA may be missed or overlooked during the front-end process, resulting in a denial due to a lack of prior authorization causing the following:

Administrative Denials: Without a PA, payers may automatically deny the claim regardless of clinical necessity, citing non-compliance with contract requirements.
Delayed Appeals: RNs must spend extra time investigating why the PA was missed, gathering documentation, and potentially submitting an “extenuating circumstances” appeal.
Increased Risk of Retrospective Denials: Even if care is clinically justified, missing a PA can trigger post-payment audits or denials, leading to additional administrative work and potential revenue loss.

The Importance of Accurate Coding

Accurate coding is another critical component of the medical necessity appeal process. RNs may not always have the same depth of knowledge in coding as certified professional coders (CPCs), but a basic understanding of coding practices can make a significant difference in the success of an appeal. Incorrectly coded services can lead to denials based on the claim being deemed “not medically necessary”, for example.

Incorrect or mismatched CPT/HCPCS codes: Using a procedure code that doesn’t align with the patient’s diagnosis or payer guidelines often triggers medical necessity denials.
Invalid or unsupported ICD-10 diagnosis codes: Claims with diagnosis codes that do not justify the billed service can be denied, even if the service was clinically appropriate.

In many cases, the appeal hinges not just on the medical necessity of the service but also on the accuracy of the coding used to describe that service. Having RN’s collaborate with coding colleagues and understanding the nuances of coding, can identify when a claim is at risk of denial before it even reaches the payer. By flagging these issues early, RNs can ensure that the appeal process is more targeted and efficient.

The Role of Technology in Denial Management

Technology is an essential tool in managing medical necessity denials. Staying informed about new technological trends, payer updates, and industry changes can help RNs anticipate potential issues and streamline the appeals process. For example, some payers now use pre-payment claim reviews that match diagnoses to levels of care, which can result in downgraded claims. These reviews may not take clinical documentation into account, leading to denials that would otherwise be overturned with proper documentation.

UnitedHealthcare (UHC): Uses automated edits and prepayment review to flag coding and documentation issues. UHC
Blue Cross Blue Shield (BCBS) Plans: Many BCBS affiliates have claim-editing systems to identify denials for invalid coding, lack of authorization, or medical necessity.
Cigna: Employs claim scrubbing and predictive analytics to reduce improper payments.
Aetna: Uses prepayment edits and claim validation systems to flag potential denials.
Medicare Advantage Plans: MA plans often have robust claim editing systems to catch non-covered services or documentation issues before payment.

Being aware of these trends and having the tools to research payer practices is critical for RN appeal writers. RNs to stay ahead of potential issues and advocate effectively for their patients. One way to navigate this is to log in to the payer’s provider portal, many of these systems publish a “Code Edits” or “Claim Edits / Smart Edits / Documentation Edits” section with lists of their active edits. (As with UHC’s Smart Edits or Aetna’s CCRP).

Collaboration: The Cornerstone of Successful Appeals

Collaboration is the most important tool in an RN’s toolbox when it comes to handling medical necessity denials. Effective communication and teamwork between clinical teams, coding departments, billing staff, and payer representatives are essential to navigating the complexities of denial management. By fostering strong relationships across all departments, RNs can contribute to the development of a more efficient and effective appeals process.

How Healthrise Can Help

Reducing medical necessity denials requires a proactive, operational approach across documentation, coding, and authorization workflows. Healthrise partners with organizations to address the root causes of denials and strengthen appeal success through:

Front-end workflow alignment: Improving prior authorization processes and pre-bill validation to prevent avoidable denials
Stronger clinical documentation: Ensuring medical necessity is clearly supported and accessible within the patient record
Coding accuracy: Aligning CPT/HCPCS and ICD-10 coding with clinical documentation and payer expectations
Denial trend visibility: Using data and analytics to identify patterns and address payer-specific requirements
Cross-functional collaboration: Connecting clinical, coding, and revenue cycle teams to streamline appeals and reduce rework

By focusing on operational consistency and upstream prevention, organizations can reduce administrative burden, improve appeal outcomes, and protect revenue.

Conclusion

Facing medical necessity denials is a complex and often frustrating process for registered nurses involved in clinical appeals. From navigating payer policies and administrative language to ensuring accurate documentation and coding, RNs must be resourceful, collaborative, and proactive to succeed in overcoming these denials. By improving communication and collaboration between departments, staying informed about the latest technological trends, and fostering a culture of denial prevention, RNs can play a critical role in ensuring that patients receive timely, medically necessary care and that healthcare providers are reimbursed fairly for their services.

Ultimately, the goal should be not just to reverse denials but to build a system that prevents them in the first place, creating a smoother, more efficient healthcare experience for both patients and providers.

Want to make the appeals process more efficient for your clinical teams? Healthrise can help streamline workflows, improve documentation, and reduce the burden of avoidable denials: let’s talk!

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