CGS Administrators Audit Defense for Skilled Nursing Facility (SNF) | Five-Day PPS (Patient Driven Payment Model) Assessment Accuracy

Skilled Nursing Facilities in Kentucky and Ohio conduct their Medicare Part A business through CGS Administrators, which holds the Jurisdiction 15 Medicare Administrative Contractor (MAC) contract for these two states and separately serves as the Home Health and Hospice MAC across a much broader multi-state jurisdiction. For SNFs, nearly every dollar of Part A reimbursement traces back to a single, foundational document: the Five-Day scheduled PPS assessment completed under the Patient Driven Payment Model, which classifies the resident into the case-mix groups that determine payment for the entire Part A stay in most circumstances. Because this single assessment carries such outsized payment weight, its accuracy is a natural and sustained focus of CGS Administrators’ medical review activity in the jurisdictions it serves.

This article explains how the Five-Day PDPM assessment drives SNF payment, the administrative presumption of coverage tied to specific case-mix classifiers, the documentation elements that support accurate PDPM component coding, and how SNFs should structure their response when CGS Administrators or another reviewing contractor challenges Five-Day assessment accuracy. It closes with how HealthBridge US supports SNFs defending PDPM assessment accuracy under Medicare audit.

How the Five-Day Assessment Drives PDPM Payment

Under the Patient Driven Payment Model, implemented in fiscal year 2020, the Five-Day scheduled PPS assessment classifies a resident into case-mix groups across five distinct payment components — physical therapy, occupational therapy, speech-language pathology, nursing, and non-therapy ancillary services — plus a separate variable per-diem adjustment schedule. Unlike the prior payment system, which relied on periodic reassessments throughout the stay to adjust payment as therapy utilization changed, PDPM’s Five-Day assessment generally classifies the resident for the entirety of the Part A stay, unless the facility completes an Interim Payment Assessment to reflect a significant change in the patient’s clinical status.

This structural feature of PDPM makes the Five-Day assessment far more consequential than any single assessment under the prior payment methodology, since an error made at this single point in the stay can affect payment for the resident’s entire Part A benefit period rather than being self-correcting through a later scheduled reassessment. SNFs and their MDS coordinators must treat the Five-Day assessment with a level of rigor proportional to this payment significance, since there are limited subsequent opportunities to correct a classification error absent a qualifying interim assessment trigger.

The Administrative Presumption of Coverage

CMS’s PDPM framework includes an administrative presumption of coverage tied to the Five-Day assessment: a beneficiary correctly assigned one of the specifically designated, more intensive case-mix classifiers on the initial Five-Day assessment is presumed to meet the SNF level of care definition through the assessment reference date of that assessment. This presumption gives SNFs a measure of certainty regarding coverage for the initial portion of the stay, but it depends entirely on the assessment having been completed accurately — a Five-Day assessment that incorrectly assigns a qualifying classifier when the underlying clinical documentation does not actually support it creates a presumption of coverage that a subsequent medical review can unwind, potentially affecting the entire period the presumption was relied upon.

This dynamic is precisely why CGS Administrators and other MACs pay close attention to Five-Day assessment accuracy: because the administrative presumption ties coverage determination directly to correct classifier assignment, an inaccurate assessment does not just risk a payment classification error, it risks the coverage determination for the associated portion of the stay as well.

Documentation Elements That Support Accurate PDPM Classification

Accurate PDPM classification depends on Minimum Data Set (MDS) coding that is fully supported by contemporaneous clinical documentation across each of the payment components. For the nursing component, MDS items reflecting the resident’s specific clinical conditions, functional status, and need for nursing interventions must be supported by nursing documentation reflecting those same conditions and interventions during the relevant look-back period. For the non-therapy ancillary component, which reflects conditions and services associated with higher-cost ancillary needs, MDS coding must be supported by physician documentation of the relevant diagnoses and by evidence of the specific services or interventions the classification is based on, such as documented extensive services or specific therapeutic interventions.

For the therapy components, functional status coding — drawn from standardized assessment items reflecting the resident’s independence or need for assistance with specific activities — must be consistent with the underlying therapy evaluation and treatment documentation, since a functional status score that does not align with the narrative clinical picture is one of the more common vulnerabilities identified during MDS accuracy review. Diagnosis coding on the MDS, which drives several components of PDPM classification, must be supported by physician documentation establishing each diagnosis relied upon, consistent with the general principle that a diagnosis code standing alone, without supporting clinical documentation, cannot support a payment classification.

Why CGS Administrators and Other MACs Scrutinize This Assessment

Because a single assessment classifies payment for an entire Part A stay under PDPM, MACs including CGS Administrators use claims data analytics to identify SNFs whose Five-Day assessment classification patterns diverge from statistically similar peer facilities — for example, a facility with an unusually high proportion of residents classified into the highest-paying non-therapy ancillary or nursing categories relative to its overall case mix. This kind of pattern is a natural trigger for a targeted medical review of Five-Day assessment accuracy, similar to how DRG assignment patterns draw RAC attention in the acute care hospital setting.

CGS Administrators, serving Jurisdiction 15’s SNFs directly, also publishes provider education and medical review priorities specific to its jurisdiction, and SNFs in Kentucky and Ohio should treat this published guidance as an indicator of which PDPM components are currently receiving the closest review attention, allowing internal MDS quality assurance efforts to be prioritized accordingly.

Building an Effective Response to a PDPM Accuracy Review

When CGS Administrators or another reviewing contractor requests documentation supporting Five-Day assessment accuracy, the response should include the completed MDS assessment itself, along with the specific clinical documentation supporting each classifier at issue — nursing notes, physician diagnosis documentation, and therapy evaluation records corresponding to the assessment’s look-back period. The response narrative should address each challenged component individually, connecting the specific MDS item coded to the corresponding clinical documentation supporting it, rather than submitting the assessment and underlying record without an organizing explanation connecting the two.

Where the administrative presumption of coverage is implicated, the response should also directly address whether the underlying classifier was accurately assigned, since a finding that the classifier itself was incorrect can affect not just the specific payment component at issue, but the coverage determination the presumption was based on for that portion of the stay.

Coordinating MDS, Nursing, Therapy, and Physician Documentation

Because the Five-Day assessment draws on data spanning nursing, therapy, and physician documentation simultaneously, sustained accuracy depends on close coordination among these disciplines during the assessment’s look-back period, generally the resident’s first several days in the facility. Nursing staff document the clinical observations and interventions that support several PDPM components, but they depend on physicians to establish and document the specific diagnoses the nursing and non-therapy ancillary components rely upon. Therapy staff conduct the functional evaluations that inform the therapy components, and their documentation needs to align with the functional status items the MDS coordinator ultimately codes. The MDS coordinator sits at the center of this process, responsible for synthesizing input from each discipline into a single, accurate assessment, but that synthesis is only as good as the underlying documentation each discipline provides during the look-back window. SNFs that build a structured, time-bound process for gathering this interdisciplinary input — rather than allowing the MDS coordinator to assemble the assessment from whatever documentation happens to be available by the assessment reference date — produce more consistently accurate Five-Day assessments than facilities relying on informal, ad hoc coordination between departments.

Building Proactive PDPM Assessment Accuracy

SNFs that experience fewer PDPM accuracy findings generally implement a structured MDS quality assurance review specifically for Five-Day assessments, verifying that each coded classifier across all five payment components is supported by clinical documentation before the assessment is finalized and transmitted. Given the outsized payment consequence of this single assessment relative to subsequent PDPM assessments, this quality assurance step deserves more rigor than a routine periodic MDS audit applied evenly across all assessment types. Ongoing MDS coordinator training, updated whenever CMS revises PDPM component definitions or coding guidance, and periodic internal audits benchmarked against CGS Administrators’ or other applicable MACs’ published medical review priorities, help SNFs identify and correct classification patterns before an external review does.

Understanding CGS Administrators’ Role and Jurisdictional Scope

CGS Administrators holds the Jurisdiction 15 A/B MAC contract, serving Medicare Part A and Part B providers, including SNFs, in Kentucky and Ohio, in addition to its separate role as the Home Health and Hospice MAC across a much larger, multi-state jurisdiction spanning fifteen states and the District of Columbia. SNFs in Kentucky and Ohio should recognize that CGS Administrators’ medical review activity for skilled nursing services reflects both national CMS program integrity priorities and jurisdiction-specific patterns identified through its own claims data analysis, meaning provider education and medical review target lists published specifically by CGS Administrators can differ somewhat from what a SNF in a different MAC jurisdiction might encounter. Facilities should monitor CGS Administrators’ provider outreach materials and medical review results directly, rather than relying solely on general, national PDPM guidance, since jurisdiction-specific communications often provide the clearest signal of which PDPM components are currently receiving heightened review attention in Kentucky and Ohio specifically.

The Interim Payment Assessment as a Correction Mechanism

Because the Five-Day assessment classifies payment for the entire Part A stay in most circumstances, the Interim Payment Assessment (IPA) serves as the primary mechanism for adjusting classification when a resident’s clinical condition changes significantly during the stay. SNFs should understand that the IPA is optional rather than mandatory, and facilities retain discretion regarding whether and when to complete one in response to a qualifying change in condition. This creates a compliance consideration distinct from the Five-Day assessment’s own accuracy: a SNF that fails to complete an IPA when a resident’s condition has changed significantly enough to warrant a different classification may find itself either overpaid or underpaid relative to the resident’s actual, current clinical needs for the remainder of the stay. While an IPA decision is generally a payment optimization question rather than a compliance mandate, SNFs should document their clinical rationale when a significant change in condition occurs and an IPA decision is made, whether that decision is to complete an IPA or to continue under the existing classification, since this documentation can become relevant if a reviewer later questions why a stay’s classification did not reflect an apparent change in the resident’s status.

How HealthBridge US Supports Your Skilled Nursing Facility

The Five-Day PDPM assessment’s outsized influence over an entire Part A stay’s reimbursement makes its accuracy one of the highest-stakes documentation functions in SNF billing. HealthBridge US supports Skilled Nursing Facilities with Five-Day assessment accuracy audits, MDS and clinical documentation reconciliation review, CGS Administrators and other MAC audit response support, and ongoing MDS coordinator training aligned to current PDPM component requirements. If your SNF is facing a CGS Administrators review of PDPM assessment accuracy, wants to strengthen its Interim Payment Assessment decision-making process, or needs to build Five-Day assessment quality assurance proactively, HealthBridge US is here to help — contact our team to discuss your PDPM audit defense needs.

References

• Centers for Medicare & Medicaid Services. “Award of Medicare Administrative Contractor (MAC) Contract” (Jurisdiction 15 Fact Sheet). https://www.cms.gov/files/document/j15-2023-fact-sheet.pdf

• U.S. Department of Health & Human Services Guidance Portal. “Administrative Level of Care Presumption under the PDPM.” https://www.hhs.gov/guidance/document/administrative-level-care-presumption-under-pdpm-0

• Centers for Medicare & Medicaid Services. “PDPM.” https://www.cms.gov/medicare/payment/prospective-payment-systems/skilled-nursing-facility-snf/pdpm

• Centers for Medicare & Medicaid Services. “Additional Documentation Request.” https://www.cms.gov/data-research/monitoring-programs/medicare-fee-service-compliance-programs/medical-review-education/additional-documentation-request

• Centers for Medicare & Medicaid Services. Medicare Program Integrity Manual, Chapter 3. https://www.cms.gov/regulations-and-guidance/guidance/manuals/downloads/pim83c03.pdf

• Centers for Medicare & Medicaid Services. Medicare Claims Processing Manual, Chapter 29 (Appeals). https://www.cms.gov/regulations-and-guidance/guidance/manuals/downloads/clm104c29.pdf

HealthBridge US is here to help. Our audit specialists support Skilled Nursing Facilities with Five-Day PDPM assessment accuracy review and CGS Administrators audit defense — contact us to protect your facility’s reimbursement.