Performant Recovery RAC Audit in Hospitals

Performant Recovery, as one of the Recovery Audit Contractors (RACs) engaged by the Centers for Medicare & Medicaid Services (CMS), plays a significant role in identifying improper Medicare payments within hospital systems. RAC audits are not routine administrative reviews—they are retrospective, high-stakes financial and compliance evaluations that directly impact hospital reimbursement, documentation practices, and regulatory risk exposure.

Hospitals participating in Medicare Fee-for-Service (FFS) programs are subject to RAC audits designed to detect both overpayments and underpayments. However, in practice, hospital-focused RAC activity is heavily concentrated on overpayment recovery, particularly in inpatient admissions, diagnosis-related group (DRG) coding accuracy, and medical necessity determinations.

A Performant Recovery RAC audit can result in substantial financial recoupment, extrapolated payment demands, increased compliance scrutiny, and reputational risk within CMS monitoring systems. For hospital compliance officers, clinical documentation improvement (CDI) teams, case management departments, and revenue cycle leaders, RAC readiness is not optional—it is a foundational operational requirement.

This expanded guide provides a structured, compliance-driven breakdown of Performant Recovery RAC audit processes, documentation expectations, high-risk areas, denial patterns, defense strategies, and hospital readiness frameworks.

Understanding Performant Recovery and the RAC Program

The CMS Recovery Audit Contractor (RAC) program was established to detect and correct improper Medicare payments in the Fee-for-Service system. RAC contractors operate on a contingency fee basis, meaning they receive compensation based on a percentage of identified overpayments collected.

Performant Recovery is one of the contracted RAC entities responsible for reviewing claims across designated jurisdictions and service categories.

RAC auditors evaluate:

• Overpayments (funds to be recouped by Medicare)

• Underpayments (additional reimbursement owed to providers)

In hospital settings, RAC reviews are predominantly focused on identifying overpayments tied to inpatient admissions, DRG classification errors, and insufficient documentation supporting medical necessity.

Unlike pre-payment audits, RAC audits occur after Medicare has already reimbursed the claim, increasing financial exposure for hospitals.

Why Hospitals Are High-Risk Targets for RAC Audits

Hospitals represent one of the highest-risk provider categories for RAC audits due to several structural and clinical factors:

• High Medicare claim volume

• Complex inpatient admission criteria

• DRG-based reimbursement systems

• Variability in physician documentation practices

• High-cost individual claims

• Frequent disputes over inpatient vs observation status

Because inpatient hospital claims often involve significant reimbursement amounts, even small documentation deficiencies can result in large financial recoupments.

Additionally, CMS uses data analytics to identify billing patterns, making hospitals with outlier utilization trends more likely to be selected for audit review.

Core Focus Areas of Performant Recovery RAC Audits

Performant Recovery typically focuses on claim categories with historically high improper payment rates. In hospitals, these include:

1. Inpatient Admission Medical Necessity

The most frequently audited area involves whether inpatient admission was justified at the time of decision.

Auditors evaluate:

• Severity of illness

• Intensity of required hospital services

• Risk of adverse outcomes without inpatient care

• Physician rationale for admission

If documentation does not clearly justify inpatient level of care, the claim may be downgraded or denied.

2. Short-Stay Admissions

Short inpatient stays—particularly those under two midnights—are heavily scrutinized under CMS policy.

RAC auditors assess:

• Whether inpatient admission was appropriate at the time of decision

• Whether observation status was more appropriate

• Whether physician expectation documentation supports inpatient care

• Whether clinical severity justifies hospitalization

Short stays represent one of the highest denial categories in RAC reviews.

3. DRG Coding Accuracy

Diagnosis-Related Group (DRG) assignments directly impact hospital reimbursement levels.

RAC audits evaluate:

• Accuracy of principal diagnosis

• Appropriateness of secondary diagnoses

• Validity of complication/comorbidity (CC/MCC) coding

• Potential upcoding or unsupported severity assignment

Even minor coding inconsistencies can significantly affect reimbursement.

4. Medical Necessity of Procedures

Procedural claims are reviewed for compliance with:

• National Coverage Determinations (NCDs)

• Local Coverage Determinations (LCDs)

• Clinical indications for procedures

• Documentation supporting intervention necessity

Procedures performed without sufficient justification are frequently denied.

5. Readmissions and Related Episodes

RAC contractors may evaluate:

• 30-day readmission patterns

• Related admissions within a defined timeframe

• Potential duplication of services

• Discharge planning adequacy

Poor discharge documentation can increase audit risk.

The RAC Audit Process in Hospitals

Understanding the RAC workflow is essential for effective compliance preparation.

Step 1: Claim Selection

Claims are selected through:

• Automated data analysis

• Complex clinical review targeting

• Statistical anomaly detection

Selected claims trigger an Additional Documentation Request (ADR).

Step 2: ADR Issuance

Performant Recovery issues an ADR letter specifying:

• Required documentation

• Submission format

• Deadline (typically 45 days)

• Claim identifiers

Failure to respond results in automatic denial.

Step 3: Documentation Submission

Hospitals must submit:

• Complete medical records

• Physician orders

• Progress notes

• Operative reports

• Discharge summaries

• Diagnostic results

• Billing records

Incomplete submissions significantly increase denial risk.

Step 4: Clinical Review

RAC clinicians evaluate whether:

• Services were medically necessary

• Documentation supports billing codes

• Admission criteria were met

• Coverage policies were followed

Step 5: Determination

Outcomes include:

• Full approval

• Partial denial

• Full denial

Denied claims result in recoupment unless appealed.

Step 6: Appeal Process

Hospitals may appeal through:

1. Redetermination (MAC level)

2. Reconsideration (QIC level)

3. Administrative Law Judge (ALJ) hearing

4. Medicare Appeals Council

5. Federal court

Documentation Requirements for RAC Defense

Hospitals must maintain documentation that clearly supports every billed service.

Medical Necessity Documentation

Must demonstrate:

• Why inpatient care was required

• Clinical severity at time of admission

• Risk if treated at lower level of care

• Physician judgment rationale

Admission Orders

Must include:

• Signed inpatient admission order

• Date and time of admission decision

• Physician rationale

Progress Notes

Must show:

• Ongoing clinical severity

• Treatment response

• Continued need for inpatient care

Discharge Summary

Must document:

• Final diagnosis

• Treatment provided

• Outcome of hospitalization

• Follow-up care instructions

Diagnostic and Procedure Support

Must align with:

• ICD-10 coding accuracy

• CPT/DRG assignment validation

• Clinical indication for procedures

Common RAC Denial Reasons in Hospitals

Performant Recovery RAC audits frequently result in denials due to:

• Lack of medical necessity for inpatient admission

• Incomplete or missing documentation

• Unsupported DRG assignment

• Lack of physician certification

• Short-stay admission justification failures

• Coding discrepancies

Most denials stem from documentation deficiencies rather than clinical care issues.

High-Risk Hospital Areas for RAC Audits

Emergency Department Admissions

High variability in documentation and rapid decision-making increases risk.

Surgical Admissions

Procedures must be clearly justified with documented indications.

Observation vs Inpatient Classification

One of the most common RAC dispute areas.

High-Cost DRG Cases

Higher reimbursement claims receive increased scrutiny.

Hospital RAC Audit Defense Strategy

1. Real-Time Documentation Practices

Documentation must be completed contemporaneously to avoid retrospective gaps.

2. Physician Education

Physicians must be trained on:

• CMS inpatient admission criteria

• Two-Midnight Rule

• Medical necessity documentation standards

• Order requirements

3. Clinical Documentation Improvement (CDI)

CDI programs ensure:

• Accurate diagnosis capture

• Proper severity documentation

• Alignment between clinical and coding data

4. Pre-Bill Claim Review

Before submission, hospitals should verify:

• Medical necessity support

• Coding accuracy

• Documentation completeness

5. Internal RAC Simulation Audits

Mock audits help identify:

• High-risk claims

• Documentation gaps

• Training deficiencies

The Two-Midnight Rule in RAC Audits

CMS uses the Two-Midnight Rule as a key inpatient billing standard.

• Inpatient admission is appropriate if expected to span two midnights

• Exceptions apply for high-intensity clinical scenarios

RAC auditors frequently challenge:

• Short inpatient stays

• Lack of physician expectation documentation

• Insufficient severity justification

Financial Impact of RAC Audits

Performant Recovery RAC audits can result in:

• Multi-million dollar recoupments

• DRG payment reversals

• Cash flow disruption

• Increased compliance costs

• Extrapolated overpayment assessments

Large-scale audits can significantly impact hospital financial stability.

Building a RAC-Ready Compliance Program

A strong hospital compliance framework includes:

• Dedicated compliance officer

• CDI integration

• Regular internal audits

• Physician documentation training

• Pre-billing review processes

• Audit response protocols

Hospitals with mature compliance systems experience fewer RAC denials and stronger appeal outcomes.

Role of EHR Systems in RAC Compliance

Electronic Health Records (EHRs) support RAC readiness by:

• Standardizing documentation

• Ensuring timestamp accuracy

• Reducing missing records

• Supporting audit retrieval

However, EHR systems must be properly configured to support Medicare documentation requirements.

Best Practices for RAC Audit Prevention

Hospitals can reduce audit exposure through:

• Strong inpatient admission criteria enforcement

• Physician documentation standardization

• CDI program expansion

• High-risk claim monitoring

• Continuous internal auditing

HealthBridge Hospital RAC Audit Support and Compliance Services

Performant Recovery RAC audits require strong documentation systems, clinical alignment, and regulatory expertise. Many hospitals struggle with inpatient justification, DRG accuracy, and audit response preparation.

HealthBridge provides consulting and management services for hospital compliance programs, including RAC audit defense, CDI optimization, internal audit programs, documentation improvement strategies, and regulatory readiness support.

Whether responding to an active audit or strengthening long-term compliance infrastructure, HealthBridge helps hospitals reduce financial risk and improve Medicare documentation integrity.

References

• https://www.cms.gov/research-statistics-data-and-systems/monitoring-programs/medicare-ffs-compliance-programs/recovery-audit-program

• https://www.performantrc.com

• https://www.cms.gov/medicare/medicare-fee-for-service-payment/acuteinpatientpps

• https://www.cms.gov/regulations-and-guidance/guidance/manuals

• https://www.cms.gov/medicare/medicare-claims-appeals

• https://www.cms.gov/Outreach-and-Education/Medicare-Learning-Network-MLN