Blog

Hospitals and health systems now spend more than $20 billion annually trying to overturn denied claims. Among the most frequently challenged and resource-intensive diagnoses is respiratory failure, driven by its clinical complexity and frequent documentation ambiguities.

Respiratory failure, especially when coded as acute or acute-on-chronic, is frequently flagged by payers for insufficient documentation or lack of clinical support. The complexity of respiratory care, coupled with vague or inconsistent provider notes, often leads to costly denials – even when the clinical evidence clearly supports the diagnosis. As denials continue to surge, health systems must take a proactive approach to documentation, coding, and clinical validation to mitigate revenue loss.

In this blog, we’ll review:

• Common Reasons for Respiratory Failure Denials
• Best Practices for Physicians
• Best Practices for CDI
• Best Practices for Coders
• Best Practices for Appeal Writers
• Additional Considerations

Common Reasons for Respiratory Failure Denials

Respiratory failure denials are often driven by documentation gaps, lack of specificity, or misalignment between clinical findings and the recorded diagnosis. Payers frequently challenge these claims based on perceived insufficient evidence of severity or unclear treatment escalation. In many cases, the clinical picture does support respiratory failure – but the denial hinges on technicalities or contradictory interpretations of the record. Below are some common reasons for denials:

• “No clinical documentation was found supporting the diagnosis.”
• “The diagnosis was not supported.”
• Absence of documented respiratory distress.
• No baseline ABG documented (especially in acute on chronic cases), or no ABG obtained to calculate P/F ratio.
• Payers argue there was “no need for invasive ventilation/ICU care” or “no intensive oxygen therapy
  • Frequently you will find contradictions in the payer’s rationale or that the payer is actually acknowledging that the patient met their criteria
  • The denial stating, “no intensive oxygen therapy” but also stating “patient was placed on 5 liters/minute” and “patient presented with room air oxygen saturation if 88%”.

Best Practices for Providers

Physician documentation is the cornerstone of defensible diagnoses. Clear, specific, and consistent notes related to respiratory failure can significantly reduce denials and improve claim success on first submission.

• Clear and consistent documentation of respiratory failure diagnosis throughout the medical record
• Provide further specify the type and acuity of respiratory failure
• Documentation of treatment should reflect clinical significance
• If the patient is on home oxygen, please document the baseline oxygen use
• If the patient is diagnosed on admission to have both pneumonia/COPD exacerbation and acute/acute on chronic respiratory failure, please clearly indicate which condition is the reason for admission (don’t list multiple interrelated conditions as reasons for admission)

Best Practices for CDI (Clinical Documentation Improvement)

The CDI team plays a critical role in validating the clinical picture and ensuring documentation supports the acuity of respiratory failure. Early intervention and precise querying can close gaps before coding or claim submission.

• Review the medical record thoroughly to identify signs/symptoms of new or worsening respiratory failure.
• Query providers for further specificity or acuity if none documented.
• Ensure the clinical picture matches what the provider is documenting. If discrepancy noted, send query to clarify.
  • Example: Patient with 2L home O2, RR only up to 20, kept on 2-3L while in hospital, patient reports SOB but is speaking in full sentences, acute on chronic respiratory failure documented.

Best Practices for Coders

Coders must be vigilant in identifying clinical indicators and confirming that documentation supports the appropriate diagnosis codes. When clinical evidence exists but provider documentation is lacking, proactive queries can safeguard against denials.

• Thorough medical record review to capture all diagnoses including respiratory failure
• Accurate coding/reporting of respiratory failure type and acuity
• Query provider at final coding when patient meets criteria for respiratory failure and diagnosis not documented
• Consult CDI at final coding when discrepancy noted in diagnosis acuity to diagnosis indicators for query to clarify diagnosis

Best Practices for Appeal Writers

When denials do occur, appeal writers must build strong, evidence-backed arguments. Successful appeals rely on a thorough review of the denial rationale, paired with a well-structured case grounded in clinical documentation and medical necessity.

• Analyze the denial letter carefully to understand the root cause.
• Craft a focused, evidence-based rebuttal when appealing
• Cite clinical documentation supporting the diagnosis.
  • Documentation of diagnosis, signs/symptoms
  • Pertinent laboratory studies
  • Treatment rendered
  • Medical literature to support your argument

Additional Considerations

Beyond claim payment, respiratory failure diagnoses carry weight in risk scoring, level-of-care justification, and quality performance metrics. Proper documentation has downstream implications for revenue integrity and compliance.

• Respiratory Failure diagnosis codes have HCC designation thus contribute to Risk Adjustment Factor (RAF) scores which are part of the model used by CMS to estimate the associated cost of Medicare Advantage beneficiaries.
• Respiratory Failure is generally considered inpatient criteria on evidence-based level of care guidelines (i.e. MCG, InterQual).
• They also are very heavily weighted for Severity of Illness and Risk of Mortality Calculations.

KLAS-Rated Partners to Help You Navigate Complex Respiratory Failure Denials

Managed Resources’ KLAS-rated Clinical Appeals team of Registered Nurses (RNs) and compliance specialists are employed onshore, and have an average of 20+ years of experience. Their credentials include: RN, NP, IMG, CCS, CDI, LNCC, C-DAM, CCM, CCS-P, CCDS, CDIP, CPC, RHIA, RHIT, CRCR, PMP and more.

Managed Resources provides dual perspective, with appeals experts that hold both provider and payer experience, to act as an true problem-solving extension of your team when dealing with complex respiratory failure denials.

In our KLAS Emerging Insights Report, we received a 94.4% Overall Performance Score on our Denials Management Services, outscoring the average Overall Performance Score of Best in KLAS Denials Management average of 91.2%.

100% of Managed Resources’ Denials Management clients reported that they would buy our services again. We proudly received A+ Ratings in the following key performance indicators:

• Quality of Staff: A+
• Strength of Partnership: A+
• Likely to Recommend: A+

To learn more about Managed Resources’ KLAS Rated Clinical Appeals & Denials Management Services, please contact us here.

To learn more about Managed Resources recent $60M denials contract with New York Health + Hospitals, please click here.

To schedule a free Denials Management Assessment, contact us here.