What it means for Medical Staff
By Dr. Romil Wadhawan, North Division Medical Director for Utilization Management, Denials & Physician Advisor Program
SOUTH PUGET SOUND -- Beginning in calendar year 2026, the Centers for Medicare & Medicaid Services (CMS) has launched a significant regulatory shift that will affect surgical workflows, patient status decisions and reimbursement. CMS has started a three-year phase-out of the Inpatient-Only (IPO) list, with full elimination anticipated by 2028. As the first step, approximately 285 procedures — predominantly musculoskeletal — have been removed from the IPO list, making them eligible for payment in either the inpatient or outpatient setting when clinically appropriate.
It is important to emphasize that removal from the IPO list does not prohibit inpatient admission. Physicians continue to retain full authority to admit a patient as an inpatient when medical necessity is clearly supported. However, CMS has been explicit that this policy is intended to accelerate site-of-service flexibility, outpatient migration and cost containment, which places increased importance on patient-specific clinical assessment and documentation.
Why this matters
This change has meaningful implications for both patient care and operational performance:
- Financial sustainability: As more procedures become outpatient-eligible, inpatient reimbursement for these cases will face heightened scrutiny. Inadequate documentation or misaligned status determinations increase the risk of denials, downcoding or non-payment.
- Patient experience: CMS is pursuing site-neutral, lower-cost care pathways. Patients may see changes in admission patterns, post-acute care options and out-of-pocket responsibility depending on their status.
- Physician discretion — with documentation expectations: Physicians maintain autonomy in determining inpatient admission, but decisions must be defensible under the 2-Midnight Rule and medical necessity standards, including for Medicare Advantage plans.
- Downstream effects: Patient status affects more than reimbursement — it may also influence Skilled Nursing Facility (SNF) eligibility, discharge planning and length of stay optimization.
What this means for surgical providers
As the IPO list phases out, status determination is increasingly individualized. Longstanding CMS rules still apply, including the 2‑Midnight Rule for both Traditional Medicare and Medicare Advantage patients. Inpatient admission should reflect factors such as medical comorbidities, intraoperative complexity, anticipated post‑operative needs and an expected stay of two midnights or more.
Default inpatient admission without patient-specific justification is more likely to result in compliance or financial risk under this evolving framework.
Key takeaways for attending surgeons
- Assess status case by case. IPO removal expands options—it does not mandate outpatient care.
- Document medical necessity clearly, including comorbidities, post‑operative risk, and expected length of stay (≥2 midnights).
- Align prior authorization and site of care, especially for Medicare Advantage patients when inpatient admission is anticipated.
- Place and sign inpatient admission orders timely, and partner early with Case Management and Utilization Management to address status questions before discharge.
A shared responsibility
Successfully navigating these changes requires collaboration across surgeons, APCs, Case Management, Utilization Management and operational leadership. Clear communication, proactive documentation and early alignment on patient status will be essential to maintaining compliance, protecting reimbursement and ensuring the right level of care for our patients.
