Hospitals participating in Medicare are subject to targeted program integrity audits designed to identify improper payments, documentation deficiencies, and compliance risks. One of the key contractors involved in these reviews is Integrity Management Services (IMS), operating under oversight from the Centers for Medicare & Medicaid Services (CMS).
IMS hospital audits are not routine reviews. They are data-driven, high-risk audits that focus on billing accuracy, medical necessity, and documentation integrity. Hospitals must be prepared to defend both the clinical appropriateness of services and the completeness of their records.
What Is an Integrity Management Services Audit?
IMS functions as a program integrity contractor supporting CMS initiatives such as improper payment reduction and fraud prevention. These audits often align with CMS directives outlined in the Medicare Program Integrity framework.
Unlike general surveys, IMS audits are:
Triggered by data analytics or billing patterns
Focused on specific service lines or claims
Retrospective in nature (post-payment review)
Financially impactful (recoupment risk)
Hospitals typically receive an Additional Documentation Request (ADR) requiring submission of full medical records for selected claims.
Scope of Hospital Audit Reviews
IMS audits evaluate whether billed services are fully supported by clinical documentation and meet Medicare coverage requirements. The review extends beyond individual notes and looks at the entire patient encounter.
Key areas of focus include:
Medical necessity of inpatient vs outpatient status
Admission appropriateness
Level of care justification
Physician documentation and orders
Coding accuracy and DRG assignment
Length of stay and utilization
Core Documentation Elements Reviewed
Physician Documentation
Physician documentation is the foundation of hospital audit defensibility. It must clearly demonstrate why the patient required the level of care billed.
Critical expectations include:
Admission order present, signed, and dated
Clear reason for hospitalization
Supporting clinical findings
Daily progress notes reflecting ongoing need
Discharge summary aligning with admission diagnosis
Weak or generic physician notes are one of the most common denial drivers.
Medical Necessity and Admission Status
One of the highest-risk areas in IMS audits is whether a patient should have been admitted as inpatient versus treated under observation or outpatient status.
Documentation must support:
Severity of illness
Intensity of services
Risk of adverse outcomes
Clinical decision-making
If the record does not justify inpatient care, claims may be downcoded or denied entirely.
Orders and Treatment Documentation
All services billed must be supported by valid physician orders and corresponding clinical documentation.
Hospitals must ensure:
Orders are present before services are rendered
Orders are signed, dated, and authenticated
Treatments match physician intent
Documentation reflects actual care delivered
Discrepancies between orders and execution are frequently cited.
Nursing and Ancillary Documentation
IMS audits evaluate consistency across disciplines. Nursing, therapy, and ancillary documentation must support the physician’s clinical narrative.
Reviewers look for:
Alignment with physician diagnosis and plan
Documentation of patient condition changes
Evidence of interventions and response
Timely charting
Inconsistencies between disciplines raise red flags during audits.
Common Findings in IMS Hospital Audits
Hospitals frequently encounter similar categories of deficiencies. These findings are not isolated issues but patterns that indicate systemic weaknesses.
Typical audit findings include:
Lack of medical necessity for inpatient admission
Missing or incomplete physician documentation
Admission orders not properly authenticated
Inconsistent documentation across disciplines
Unsupported DRG coding
Overuse of inpatient status for short stays
These findings often lead to payment recoupment and increased audit scrutiny.
High-Risk Service Lines
Certain hospital services are more frequently targeted due to historical improper payment rates.
Common high-risk areas include:
Hospitals should prioritize internal audits in these areas.
Responding to an IMS Audit Request
An IMS audit begins with an ADR requesting documentation for selected claims. Timely and accurate response is critical.
A structured response approach includes:
Assigning a dedicated audit response team
Reviewing each claim internally before submission
Verifying completeness of records
Ensuring documentation supports billed services
Organizing records in a clear and logical format
Submitting incomplete or disorganized records increases denial risk.
Strategies to Reduce Audit Risk
Hospitals must adopt proactive compliance strategies rather than reactive fixes.
Key strategies include:
Conduct routine internal audits focused on medical necessity
Implement physician documentation improvement programs
Align coding and clinical documentation
Educate physicians on admission criteria and requirements
Monitor inpatient vs observation trends
Perform mock IMS audits
A strong compliance program reduces both denial rates and financial exposure.
Alignment with CMS Program Integrity Expectations
IMS audits reflect broader CMS priorities around payment accuracy and documentation integrity. Hospitals should align internal processes with CMS expectations outlined in the Program Integrity framework.
Facilities that perform well in audits typically demonstrate:
Clear, consistent documentation across all disciplines
Strong physician engagement
Timely and accurate recordkeeping
Active quality assurance and compliance oversight
Conclusion
Integrity Management Services hospital audits are high-impact reviews that require hospitals to demonstrate full compliance with Medicare documentation and billing requirements. The focus is not just on whether care was provided, but whether it was properly justified and documented.
Hospitals that invest in strong documentation systems, physician engagement, and proactive auditing are best positioned to withstand IMS reviews and reduce financial risk.
References
CMS Program Integrity Overview
https://www.cms.gov/regulations-and-guidance/guidance/manuals/internet-only-manuals-ioms-items/cms019033
Integrity Management Services Contractor Overview
https://www.integritym.com
CMS Program Integrity Manual (Pub. 100-08)
https://www.cms.gov/regulations-and-guidance/guidance/manuals/downloads/pim83c03.pdf
Medicare Claims Processing Manual
https://www.cms.gov/regulations-and-guidance/guidance/manuals/downloads/clm104c01.pdf
Medicare Benefit Policy Manual
https://www.cms.gov/regulations-and-guidance/guidance/manuals/downloads/bp102c01.pdf
