The Documentation Gap: How New CMS Requirements Are Exposing ASC Compliance Risk

ASC volumes are rising, and more complex procedures are continuing to shift into outpatient settings. 

At the same time, CMS has begun expanding how it reviews and approves ASC services. For many centers, this means more documentation is required earlier in the process, before a case even reaches the OR. 

For teams already managing controlled substances with manual processes and limited staff, these changes introduce new operational pressure that is worth understanding. 

New CMS Requirements Now in Effect

Since January 2026, CMS has begun rolling out a five-year prior authorization demonstration for ASCs in ten states: California, Florida, Texas, Arizona, Ohio, Tennessee, Pennsylvania, Maryland, Georgia, and New York. Certain procedures now require pre-approval before they can be performed. ASCs that do not obtain prior authorization are subject to prepayment medical review, which introduces delays and additional administrative burden. 

Running alongside this, CMS has also begun implementing the Wasteful and Inappropriate Service Reduction (WISeR) Model, a six-year pilot that uses AI-based review to identify services considered at risk for overuse or improper billing. The targeted procedures include epidural steroid injections, arthroscopic knee procedures, and lumbar decompression, all common in ASC settings. 

Together, these programs reflect a broader shift already underway in CMS strategy, moving from post-payment audits to pre-service review. The result is that more documentation responsibility is now landing on your staff before a case reaches the OR. 

For many ASCs, this is still early, but the operational impact is already starting to show. 

How This Connects to Controlled Substance Management

Prior authorization requirements do not exist in isolation from clinical operations. When a case involves controlled substances, incomplete documentation at any point in the process creates compliance risk beyond a delayed claim. 

Consider a scenario that many ASCs will recognize: a prior authorization is delayed because supporting documentation was incomplete, and a scheduled case is postponed. If medications have already been pulled and prepared, the center now faces a chain-of-custody issue layered on top of a scheduling disruption. In a high-volume ASC with a lean team, these situations compound quickly. 

CMS has identified incomplete documentation as the leading cause of prior authorization delays. That responsibility falls across schedulers, clinical staff, and compliance personnel, often simultaneously. 

Where Many ASCs Are Exposed

Many ASCs continue to manage controlled substances through manual processes: paper logs, physical counts, and end-of-shift reconciliation. These systems were built for lower volumes and less demanding regulatory requirements. As case complexity increases and oversight intensifies, they are harder to sustain reliably. 

DEA compliance, diversion prevention, and audit-ready documentation are receiving closer attention from surveyors and payers. ASCs are increasingly being held to standards that more closely resemble those of hospital settings. That is a significant ask for centers that were not designed with hospital-level infrastructure, and it is worth acknowledging directly. 

The gap between where regulatory expectations are and where manual systems can reliably get you is where compliance risk accumulates. 

What Audit-Ready Looks Like in Practice 

ASCs that manage regulatory pressure well share one thing in common: their compliance documentation is a natural output of how they operate every day, not a separate process assembled before an audit. 

For controlled substances, that means a clear chain of custody from receipt through administration and waste, automated logging that does not rely on manual reconciliation at end of shift, and records that can be produced quickly in response to a surveyor or payer request. 

MedServe is built specifically for ASCs. Our digital narcotic cabinet and cloud-based software eliminate manual logs, automate documentation, and keep your center compliant without the complexity of hospital-level systems. If your team is evaluating ways to strengthen controlled substance management, let’s talk about what this could look like for your facility.