CY 2027 OPPS/ASC Proposed Rule Summary

CMS released the calendar year 2027 proposed rule for Medicare’s hospital outpatient prospective payment system (OPPS) and ambulatory surgical center (ASC) payment system (CMS-1850-P) on July 2, 2026. Policies in the proposed rule will generally go into effect on January 1, 2027, unless otherwise specified. The proposed rule was published on July 7, 2026, in the Federal Register. The public comment period will close on August 31, 2026.

View the CY 2027 OPPS Proposed Rule Executive Impact Brief (PNG file)

CY 2027 OPPS Proposed Rule Addendum and Tools

• Comparison of Proposed 2027 ASC Addendum AA to 2026 Addendum AA
• Comparison of Proposed 2027 ASC Addendum BB to 2026 Addendum BB
• Comparison of Proposed 2027 OPPS Addendum A with July 2026 Addendum A
• Comparison of Proposed 2027 OPPS Addendum B with July 2026 Addendum B
• CY 2027 Proposed OPPS APC/HCPCS Lookup Tool

CY 2027 OPPS Proposed Rule Resources

• HFMA Comments on CY 2027 Hospital OPPS and ASC Proposed Rule (comment letter)
• FastFinance: AI nurse opposition; OPPS changes detailed (podcast)
• Cost saving strategies, a more modern patient experience and more (podcast)
• CMS’s 2027 OPPS proposed rule would cut 340B and imaging payments (article)
• CMS proposes new 340B reporting and HOPD attestation requirements (article)
• Medicare Outpatient Reimbursement Fundamentals (HFMA education course)