Healthcare providers have developed consistent processes for producing the appropriate documentation for payers to support care delivery. However, the translation of specific procedures into the correct DRG doesn’t always align.
Because false alignment persists, the core problem is systemic gaps in documentation review processes creating financial exposure for payers.
Recurring issues, including inaccurately assigned procedure codes, documentation that does not adequately support secondary diagnoses and DRG weights exceeding what the clinical record justifies, can result in significant overpayments from payers to providers.
In 2026, technology is now emerging as an asset and collaborator for clinical auditors to resolve these issues and create better coding accuracy and lower payment risk for payers.
Spotting $7 million in overpayment exposure
Recently, a large healthcare payer partnered with CERIS to conduct a targeted DRG review. Over a three-month period, CERIS’ proprietary technology was leveraged to quickly and consistently identify trends across data samples.
This approach isolated procedure-driven discrepancies and documentation gaps at a level of detail that would have been challenging to discover only using manual review processes. The technology-enabled, targeted DRG review revealed insights that gave the payer visibility into where the clinical and narrative coding didn’t align. This showed the real drivers of overpayment exposure.
At the same time, CERIS’ experienced auditing team provided clinical and coding expertise to validate each case and ensure the findings were accurate, defensible and grounded in documentation.
While automation is incredibly effective at identifying overpayment risks and narrowing a team’s focus, expert clinical judgment is essential. This is particularly true for cases driven by surgical sequencing, multiple procedures or nuanced clinical scenarios. A great example is complex surgical cases with multiple CPT-to-ICD mappings.
“Automation can flag DRG shifts driven by procedure hierarchy, but only a clinically experienced auditor can determine whether that DRG truly reflects the principal procedure and resource intensity,” Ms. Wilson said. “That handoff is critical.”
This technology-enabled review demonstrated that more than 25% of cases resulted in recoverable savings, with total overpayments exceeding $7 million for just one quarter.
According to Tina Wilson, RN, CCS, Director of CERIS’ DRG audit program, the $7 million overpayment exposure for the quarter is more than just a dollar amount — it’s a signal that reflects how frequently DRG assignments miss the mark due to procedure-driven coding inaccuracies. This problem is common when complex cases move quickly through revenue cycle workflows.
Collaborative process improvement
When systemic gaps in documentation and review processes are uncovered, CERIS approaches the resulting payer/provider conversations as a partner, not an adversary. The goal is to share clear, objective findings and explain “the why” behind these findings.
Collaborative improvement processes focus on transparency, education and alignment. Ms. Wilson explained that CERIS walks through the overall patterns that have been identified, not just individual claims, and works with providers to strengthen their documentation and coding precision. Their team pays particular attention to procedures that drive frequent DRG changes.
While retrospective audits will always play a role, DRG review insights are incredibly powerful when used upstream as part of collaborative improvement efforts. By embedding DRG risk logic earlier in the claims lifecycle, payers can prioritize high-impact cases for pre-payment review and use historical findings to guide targeted audits.
“When you focus on known risk areas, rather than reviewing everything after the fact, you prevent overpayments instead of chasing them,” Ms. Wilson said.
Strengthening DRG oversight
To bolster DRG oversight, CERIS points to three best practices for payer leaders: First, payers should invest in targeted DRG analytics that focus on high-risk procedures, not just diagnoses.
They have to then pair that intelligence with experienced clinical auditors who understand how DRGs are truly built.
Finally, teams need to use results to drive continuous improvement — not just recovery. Strong DRG oversight balances financial integrity with fair reimbursement. That balance comes from precision, consistency and collaboration.
The biggest takeaway for payers is that DRG accuracy isn’t just a compliance issue, it’s also a complexity issue. When payers and providers communicate around accurate reimbursement, everyone benefits.
“Our goal at CERIS is to bring clarity to complexity, reduce unnecessary friction and help the industry move toward smarter, more proactive payment integrity practices,” Ms. Wilson said
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