SNF Cost Report Appeal Strategy After MAC Adjustment

A skilled nursing facility can read the reimbursement rules correctly, apply the right methodology, and still lose money at settlement, because most MAC audit adjustments turn on something other than policy disagreement. The dispute is usually about whether the supporting documentation was complete, timely, and sufficient in the auditor's eyes, not whether the facility understood the rule. That distinction changes what an appeal actually has to prove.

Four specific failure points account for most of the risk: misallocated therapy costs under PDPM, contract labor that was not properly separated from staff salaries, patient-day reconciliation that does not fully tie out, and capital or lease items left out of depreciation and ratio calculations. Each is a documentation gap rather than a methodology error, and each is the kind of thing a desk reviewer can flag without ever touching the underlying policy question.

Related-party transactions sit above the rest in scale. Facilities now route a substantial share of revenue through related parties, and CMS has historically not reviewed or audited the annual Medicare cost reports SNFs submit to confirm compliance with federal disclosure rules on those relationships. The OIG's December 2024 audit, report A-07-21-02836, found that seven of fourteen sampled facilities failed to properly adjust related-party costs, with the resulting overstatement split between profits never removed from undisclosed related parties, profits never removed from disclosed related parties, and costs adjusted incorrectly. The Pruitt Health cost reports for 2018 through 2020 showed payments to related parties that exceeded what those same related parties reported as their own actual costs, by tens of millions of dollars, a gap MAC reviewers are now trained to look for. What connects Pruitt Health's scale to the single desk-review case is the same underlying failure: money moved to a related party without a cost basis attached to it.

The Cost of Losing an Appeal in the FY 2026 Payment Environment

Every dollar lost to an unrecovered MAC adjustment now lands on thinner ground than it did a few years ago. The FY 2026 rate environment makes unrecovered MAC adjustments more damaging in practice, because the net payment increase is smaller than in prior years and does not cushion a settlement loss the way the larger annual updates once did, so a facility absorbing a related-party adjustment or a therapy cost misallocation is now doing so against a smaller margin of built-in rate growth, consuming a larger share of whatever gain the annual update was supposed to deliver.

The rate update itself does not account for a separate quality-based payment adjustment program. A facility that underperforms on those quality metrics can watch its payment increase get offset, or wiped out, independent of anything happening in its cost report.

A second financial risk layer sits alongside documentation adjustments. OIG is actively auditing SNFs for PDPM upcoding, questions of medical necessity, improper therapy billing, and billing errors under SNF Consolidated Billing, and the FY 2027 proposed rule goes further, including a formal request for information on updating PDPM specifically to address case-mix upcoding. That signals sustained federal attention to the same payment categories most exposed to MAC-level adjustments.

The labor-related share used in the FY 2026 wage index calculation is finalized slightly below its FY 2025 level, and the index still relies on hospital inpatient wage data because SNF-specific wage data has proven too volatile for CMS to use reliably. A facility that can show its wage index fell further than that cap should have allowed has a documentable, fact-based claim rather than a policy objection, which matters a great deal for how the issue gets classified later in the appeal process.

How the OIG's December 2024 findings changed the enforcement posture facilities are now appealing against

The OIG's December 2024 findings (report A-07-21-02836) made related-party transactions an active audit priority, and the appeal strategy has to account for an enforcement posture shaped by those findings. The OIG's audit, report A-07-21-02836, moved related-party scrutiny to the front of the line, and any appeal strategy built today has to assume MACs are looking at these transactions with that audit in mind.

The OIG's sample exposed two distinct failure patterns, not one.

CMS has pushed back on the audit, arguing that non-allowable related-party costs do not directly affect Medicare payment under the SNF PPS, and that if MACs had to audit every SNF cost report for related-party compliance, it would consume significant resources without a payment impact large enough to justify the cost. That objection deserves a response, because a facility will likely hear some version of it from the other side of the table. The counter runs through aggregate rate-setting rather than any single settlement: cost reports feed the data CMS uses to calibrate rates across the system, so a related-party cost that looks immaterial to one facility's payment can still distort the base CMS uses to set rates for everyone.

One detail in the OIG's findings carries more practical weight than it might first appear. The recommendation requiring MACs to formally audit related-party disclosures as part of their desk review process has not been implemented across the board. A given MAC adjustment made on related-party grounds may rest on no formally mandated audit protocol. Facilities preparing for a hearing should expect CMS to raise its resource-burden argument at the Board, so anticipating it in advance is better than encountering it for the first time there.

What the Notice of Program Reimbursement Triggers

Every appeal right a SNF holds in the cost report process traces back to one document: the Notice of Program Reimbursement. The clock that document starts is short, and it does not bend for a facility that was otherwise correct on the merits. Missing the deadline ends the appeal regardless of how strong the underlying argument was.

The rule itself allows two ways to calculate the deadline, and facilities should track both the day the NPR arrives. Calendaring both dates the moment the NPR comes in removes any ambiguity about which deadline governs a given appeal.

The dollar amount in dispute determines where the appeal goes, and getting this wrong at the outset creates avoidable delay. Smaller adjustments go through MAC-level appeals, but individual PRRB appeals need a higher minimum amount in controversy, and group appeals that combine multiple providers need a still larger aggregate figure. Knowing which threshold a given issue falls under, before the appeal is filed, shapes whether issues get combined into one filing or kept separate.

The record for an appeal does not have to wait for the NPR to begin. Laying that foundation at the filing stage, rather than scrambling to reconstruct it after settlement, puts the facility ahead of the clock rather than racing it.

Policy-based issues call for a different tactic. The recommended practice is to add the policy-based issue as a placeholder on the appealed issues list, so appeal rights are protected in the near term, then move the placeholder to a multi-provider group appeal once the PRRB filing is complete, which protects rights without committing resources prematurely.

Building the evidentiary record before the MAC reconsideration stage

The outcome of most MAC adjustment appeals gets decided before the reconsideration request is even filed. The PRRB reviews the record built at the MAC level, and a gap left in that record rarely gets filled later in the process. That makes the preparation work done ahead of reconsideration the real argument, more than anything written afterward.

For contract labor and related-party disputes, the record has to separate what the related party actually spent from what it billed the SNF. A MAC desk review example grounds the risk concretely: a management company billed at a six-figure annual level but could substantiate only a portion of that in actual expenses, and CMS required the SNF to adjust its cost report downward by the unsupported difference.

CMS's cap on year-over-year wage index decreases is a real protection, but it only helps a facility that documents the drop and claims it with evidence rather than assuming the cap applied automatically.

Auditors tend to flag reconciliation gaps as completeness problems, not arithmetic errors, so the counter-record needs to answer that same completeness question instead of just re-running the math.

For related-party costs generally, the OIG's finding that both undisclosed and disclosed relationships produced overstated costs means disclosure alone proves nothing.

Sequencing the Appeal from MAC Reconsideration Through PRRB Review

MAC reconsideration and PRRB review operate on different logics, and treating them as interchangeable stages wastes the advantages each one offers. MAC reconsideration is an administrative opportunity to resolve disputes close to the source, built for fact-based disagreements, while PRRB review is a formal, quasi-judicial proceeding where policy-based arguments carry real weight.

At the reconsideration stage, the objective is narrow: resolve adjustments that rest on documentation gaps rather than disagreements over policy. The MAC has the authority to reverse an adjustment when the facility supplies documentation that was either missing from the original desk review or was submitted but not properly weighed. That authority only helps a facility that comes prepared with the kind of record described in the previous section.

You should sort issues into fact-based and policy-based categories before you file the reconsideration request, not somewhere in the middle of the process. Questions that turn on whether the documentation was sufficient belong at the MAC level. Questions that turn on whether CMS's methodology, or the MAC's application of that methodology, was correct belong at the PRRB. Getting this triage right up front keeps a facility from spending its reconsideration effort arguing a policy point the MAC has no authority to decide, and from losing a documentation point by escalating it too early.

Where a policy question remains genuinely unsettled, or where a multi-provider group appeal is already forming around the same issue, you can file a placeholder to preserve appeal rights within the 180-day window while you wait for the group appeal to take shape.

Once an issue reaches the PRRB, the Board works from the record built below it, and new evidence offered for the first time at that stage can be challenged as untimely. That single fact is the reason the MAC reconsideration stage has to produce a complete record rather than a partial one. The sequence that holds up in practice runs in one direction: build the record, resolve what can be resolved through MAC reconsideration, place a marker on unsettled policy questions, and treat the PRRB as the escalation point rather than the starting line.

One other channel deserves separate tracking rather than folding it into this sequence. The FY 2026 final rule established a new VBP reconsideration process running on its own faster timeline. Beginning with quarterly confidential feedback reports issued on or after October 1, 2025, a SNF unsatisfied with CMS's review and correction decision can request reconsideration, but that request has to go in no later than 15 calendar days from the day after the date noted in the decision. The VBP reconsideration channel should be flagged as a distinct track, not folded into the PRRB discussion, because conflating them creates compliance risk.

Arguments with the Most Traction at the PRRB Stage

Some arguments gain strength the higher they climb through the appeal process, and the pattern behind which ones do is consistent. Arguments aimed at the adequacy of MAC guidance, or at inconsistency in how a MAC applied that guidance, tend to do better at the PRRB than arguments aimed at CMS policy itself, because the Board has the authority to correct a MAC's error without having to overturn CMS policy in the process. That distinction should shape how a facility frames its issue list well before the PRRB hearing arrives. An argument asking the Board to say CMS got the rule wrong faces a much steeper climb than one asking the Board to say the MAC misapplied a rule CMS already wrote.

Wage index arguments carry structural support from CMS's own public reasoning. CMS explicitly acknowledges that the SNF wage index uses hospital inpatient data because SNF-specific data is too volatile, and that auditing all SNF cost reports in the way IPPS processes work would burden providers significantly. That concession gives a facility real footing to argue inconsistent wage index application in years when CBSA reclassification affected its rate, especially where the cap on annual decreases should have limited the damage.

Related-party appeals built around the adequacy of MAC guidance occupy a narrower but genuine opening. As of mid-2026, the OIG's recommendation that MACs formally audit related-party disclosures as part of desk reviews has not been implemented, so a MAC adjustment made on related-party grounds may have been issued outside any formally prescribed audit protocol. That is a procedural challenge, separate from whatever the underlying cost dispute actually involves, and it holds up independently of whether the facility's related-party costs were ultimately allowable or not.

PDPM appeals centered on ICD-10 mapping errors have a clear and fairly mechanical path to success, but only under one specific condition.