EXECUTIVE SUMMARY
A commercial payer denied a one-day inpatient (IP) admission for a teenage patient with sepsis secondary to acute appendicitis, despite evidence of significant illness and operative findings of peritonitis. The denial placed a substantial amount of IP reimbursement at risk. Following the physician-led peer-to-peer (P2P) review, the denial was overturned and appropriate reimbursement was secured.
TAKE-AWAY
Short-stay admissions remain particularly vulnerable to payer scrutiny. Access to experienced physician advisor resources can help hospitals defend medically necessary IP care, secure appropriate reimbursement, and support internal teams facing increasing denial workloads.
THE CHALLENGE
Payers frequently challenge IP admissions for medical necessity and level-of-care (LOC) criteria, with Medicare Advantage (MA) plans consistently reported as generating the highest volume of these denials. Industry data shows overall hospital claim denial rates exceeding 10%, with clinical denials related to medical necessity representing a smaller but growing portion of IP reimbursement disputes. MA plans often dispute IP LOC cases that involve short-stay admissions and observation-to-IP conversions, with commercial and MA plans also denying cases more frequently than Traditional Medicare or Medicaid Fee-for-Service.
The denial management and resolution functions are critically important because they directly impact a hospital’s financial and operational health. More importantly, they influence a hospital’s ability to provide patient care, impacting quality and patient satisfaction.
THE SOLUTION
Maximizing the revenue cycle is paramount, which is why many hospitals employ physician advisors. Physician advisors handle various tasks and responsibilities; however, one of their primary roles involves engaging in P2P discussions with payer medical directors to overturn denials. This requires understanding why the denial took place and providing feedback to the utilization review (UR) team. That said, “the goal is not simply to avoid denials, but to ensure that the medical record accurately reflects the complexity of patient care, supports appropriate reimbursement, and protects patients from unsafe downgrades in care.”1 Communication with medical documentation teams plays a central role in this critical process. Consequently, clinical documentation integrity (CDI) and UR teams are aligning more closely within health systems.
As internal physician advisory teams take on more responsibilities, hospitals and health systems need to address gaps in physician advisor capacity and coverage. AppriseMD has been a valuable resource for hospitals looking to maximize mid-revenue cycle capabilities, offering expertise and support to meet the increasing demands placed on internal physician advisors. In this case study, the hospital’s internal physician advisor resources were fully occupied, so the case was referred to AppriseMD to ensure a timely payer discussion and appeal opportunity.
CLINICAL SUMMARY
A 16-year-old male patient presented to the emergency department (ED) with right lower quadrant abdominal pain accompanied by nausea and vomiting. Symptoms began around midnight, and upon arrival, the patient was tachycardic, with a heart rate up to 123 bpm, and tachypneic, with a respiratory rate up to 24. He was afebrile and maintained adequate oxygen saturation on room air. Physical examination revealed significant right lower quadrant tenderness to palpation. Laboratory studies were notable for leukocytosis with a white blood cell count of 21.65, absolute neutrophil count of 19.27, elevated C-reactive protein (CRP) of 2.3, sodium 135, potassium 3.2, bicarbonate 18, anion gap 20, and total bilirubin 1.2. Liver function tests were otherwise normal. A computed tomography (CT) scan of the abdomen and pelvis demonstrated acute appendicitis without evidence of perforation or abscess. He was admitted with sepsis secondary to acute appendicitis.
The patient underwent a laparoscopic appendectomy. Intraoperatively, purulent fluid was identified and peritoneal lavage was performed. His postoperative course was uncomplicated. By the following day, he was tolerating oral intake, his pain was well controlled, and he was voiding without difficulty. The patient was discharged home in stable condition after a one-day hospital stay.
DENIAL OUTCOME
AppriseMD scheduled a P2P with the payer, who denied the one-day stay due to the patient’s normal vital signs following surgery and his ability to eat and drink post-procedure. The AppriseMD physician advisor discussed the specifics of the case, including the fact that InterQual guidelines were met for IP LOC for this pediatric patient. While the commercial payer relies on MCG guidelines, the physician advisor communicated that the patient met sepsis criteria with acute appendicitis with significant leukocytosis, tachycardia, and tachypnea. There was also an anion gap of 20, along with peritonitis on exam and an intraoperative note of purulent fluid that required suctioning.
The physician advisor successfully demonstrated that medical necessity should be assessed based on the patient’s presentation and clinical risk at admission, rather than solely on the patient’s postoperative improvement. The payer rescinded the denial after the P2P. Following the successful overturn, the hospital received appropriate reimbursement for the services it provided.
ABOUT APPRISEMD
AppriseMD provides denial management and physician advisory solutions to help hospitals and health systems optimize the revenue cycle with data transparency and operational efficiency.
SOURCE:
- “Protection from AI-Driven Payer Denials,” AppriseMD. Aug. 24, 2026.