Why Your Medicaid Reimbursement Rate Is Probably Wrong

The number that appears on your Medicaid remittance advice each month is not arbitrary. It is the output of a calculation, in most states a highly specific and rules-bound calculation, that incorporates your facility's reported costs, your residents' assessed care needs, and a set of policy decisions made by your state Medicaid agency. Understanding how that number is derived is not just an academic exercise. It is a financial management imperative, because in most nursing facilities, the calculation is producing a lower number than the facility has earned, and the difference is recoverable.

This is a strong claim. It deserves explanation.

The core issue is that Medicaid reimbursement for nursing facilities is not a price that the state sets unilaterally and the facility simply receives. It is a rate that the facility, to a significant degree, influences through the data it submits, the documentation it maintains, and the processes it follows. Operators who understand this generate more revenue from the same resident population than operators who treat Medicaid rate setting as something that happens to them. The gap between those two groups, in per-resident-day revenue terms, is often $15 to $35 per resident per day. At a 100-bed facility with 80 Medicaid residents, that difference over a full year is between $440,000 and $1 million.

The problems that create this gap are specific and correctable. Here are the most common ones.

The Cost Report: The Foundation Most Facilities Ignore

Nearly every state uses historical cost data, reported by facilities on an annual Medicaid cost report, as the basis for establishing reimbursement rates. The cost report is not simply a summary of the general ledger. It is a structured document with specific line items, allocation methodologies, and rules about what costs are allowable, how they are categorized, and how they are attributed to patient care versus non-patient care functions.

The trouble is that most nursing facility accounting departments prepare cost reports the same way they have always prepared them, using the same allocations, the same categorizations, and the same assumptions that were set up when the facility was first enrolled in Medicaid or when the most recent software system was implemented. They are not doing anything wrong, exactly. But they may not be doing everything right, and the difference between the two can be substantial.

Specific issues that appear frequently in cost report reviews:

Allowable costs being excluded. States define allowable costs differently, but most allow a broader range of operating expenses than facilities actually claim. Administrative costs associated with quality improvement initiatives, certain training and staff development expenses, and specific categories of capital-related costs are allowable in many states but are excluded by facilities whose accountants are uncertain about the rules and default to conservatism.

Incorrect allocation of overhead. When a cost center, say maintenance or housekeeping, serves both patient care and non-patient care functions, its costs must be allocated between those functions using an approved methodology. The methodology used can significantly affect how much cost flows into patient care rate-setting components. Facilities that have never reviewed whether their overhead allocation methodology is optimal for their cost structure are often using defaults that disadvantage them.

Misclassification between cost centers. The per-diem rate produced by the cost report is typically built up from several components, nursing, dietary, housekeeping, administration, and so on, each with its own rate calculation logic. Costs placed in the wrong cost center can be weighted differently in the rate calculation and may not generate the reimbursement they would have in the correct cost center.

Related-party transactions. Facilities that lease their building from an affiliated entity, receive management services from a parent company, or purchase supplies from related parties must report those transactions under specific rules. If related-party costs are not properly disclosed and documented, they may be disallowed entirely, reducing the cost base from which the rate is calculated.

A professional review of the Medicaid cost report, comparing the facility's current cost reporting practices against what the state methodology would allow, is one of the highest-return engagements available to a nursing facility. The cost of the review is modest. The recoverable revenue, prospectively, is frequently several hundred thousand dollars per year.

The MDS: Where Acuity Revenue Is Won or Lost

The Minimum Data Set is the clinical assessment instrument used in nursing facilities to document each resident's health status, functional abilities, and care needs. The MDS drives case mix classification under both Medicare (PDPM) and Medicaid acuity-adjusted rate systems. It is among the most consequential documents a nursing facility produces, and it is also among the most error-prone.

MDS errors tend to cluster in predictable ways.

Late assessments. The MDS must be completed within specific windows after admission and at defined intervals thereafter. When assessments are late, either because staff capacity is stretched or because the scheduling process is inadequately monitored, the facility may lose the ability to capture a higher acuity level that would have applied during the missed window. In PDPM, where the initial assessment drives the entire Medicare payment for a qualifying stay, a delayed or incomplete assessment can mean that the facility receives a lower rate for the duration of a high-acuity resident's stay.

Incomplete coding of conditions and diagnoses. The MDS includes sections for active diagnoses, which must be supported by documentation in the medical record. Nurses and assessment coordinators who are rushed, inadequately trained on MDS coding, or not communicating effectively with the medical director frequently miss conditions that should be coded. Coding a diagnosis on the MDS requires that it be documented as active in the clinical record; if the physician has not signed off on a condition that the nursing staff is actively treating, the diagnosis cannot be coded and the associated reimbursement is lost.

Section GG and function score underreporting. Section GG of the MDS captures functional performance on activities such as eating, oral hygiene, sitting to lying, transfers, and ambulation. The functional scores in Section GG influence payment under PDPM and are also increasingly important in quality reporting. The scoring requires observation of the resident's actual performance over a three-day window, and facilities where the process for capturing those observations is informal or inconsistent systematically undercode functional status, which translates directly to lower payment.

Therapy documentation gaps. Under PDPM, therapy is no longer the primary driver of Medicare payment the way it was under the prior RUG-IV system, but therapy-related coding on the MDS still influences payment through the PT, OT, and SLP component rates. More importantly, the clinical complexity and non-therapy ancillary components of PDPM, which cover nursing care intensity and specialty services, are highly dependent on accurate coding of clinical conditions. These sections have often received less attention than the therapy sections, which were the primary focus under the old payment system.

The financial impact of systematic MDS improvement at a typical facility is significant. Most analyses of MDS accuracy at facilities without a dedicated quality assurance process find that 10 to 20 percent of residents are coded at a level that does not fully reflect their care complexity. Correcting that, prospectively, with proper clinical documentation to support the higher coding level, can increase per-resident-day revenue by $15 to $40 under Medicare and by lesser but meaningful amounts under Medicaid acuity-adjusted systems.

Managed Care: The Rate Sheet Nobody Monitors

Managed care has grown substantially as a payer source in long-term care over the past decade, driven by the spread of Medicaid managed care programs and the increasing prevalence of Medicare Advantage plans. In some markets, managed care now accounts for 20 to 30 percent of skilled nursing admissions.

The reimbursement terms for managed care are set by contract, not by a state rate calculation. This means that every managed care organization (MCO) the facility works with has a separate rate schedule, often with different rates for different levels of care, different rules about what services are included in the per-diem versus separately billable, and different documentation requirements for authorization and continued stay.

Most nursing facilities sign these contracts, receive the rate schedules, and then do not look at them again until a dispute arises. This is a problem for two reasons.

First, managed care organizations have complex billing systems, and errors in how those systems apply contract rates are common. A facility that does not systematically reconcile its remittance advice against its contracted rate schedule will not catch when an MCO applies the wrong level-of-care rate, fails to include an authorized ancillary service, or calculates a co-insurance liability incorrectly. These errors are not malicious; they are the output of large, imperfect claims processing systems. But they are also financially meaningful and persistently correctable. Facilities that conduct monthly managed care remittance reconciliation routinely identify and recover $5,000 to $20,000 per month in legitimate underpayments.

Second, managed care contracts, particularly for Medicare Advantage plans, are often written with provisions that create risk for facilities that do not monitor them carefully. Prior authorization requirements mean that days of care provided without a valid authorization may not be reimbursable. Continued stay review requirements mean that residents who remain in skilled status beyond the initial authorized period require additional clinical documentation to support continued payment. Facilities without a robust authorization tracking process, typically one that flags impending authorization expirations 48 to 72 hours in advance, frequently absorb write-offs that could have been avoided with better process management.

Documentation: The Clinical-Financial Connection

Across all of these Medicaid and managed care reimbursement issues, the underlying variable is documentation. Not documentation as a compliance exercise, which is how it is often framed, but documentation as the mechanism by which the care being delivered gets translated into revenue.

Every service provided to a resident that is not documented did not happen, from a reimbursement perspective. Every condition being treated that is not noted in the medical record with appropriate clinical specificity cannot be coded on the MDS. Every therapy session not captured in the therapy notes cannot be billed. Every nursing intervention performed at 2 a.m. that went unrecorded is invisible to the rate-setting system.

The facilities that have closed the gap between what they deliver and what they get paid for have addressed documentation as a clinical process issue, not just an administrative one. Nurses and therapists who understand that their documentation has direct financial consequences, and who receive regular feedback on documentation quality, produce records that more accurately reflect the care being provided. The shift is cultural as much as it is procedural, and it requires the administrator and DON to model the message consistently.

Training is part of it. Feedback loops are part of it. Structure is part of it: a facility where the MDS coordinator sits in a room down the hall from the clinical staff, with no regular interaction with the Director of Nursing, is going to have a different documentation culture than one where the clinical assessment and care planning processes are genuinely integrated.

What a Corrective Process Looks Like

Operators who want to determine whether their Medicaid reimbursement rate reflects the care they are delivering can start with a structured self-assessment across three areas.

The first is cost report review. Pull the most recent filed cost report and compare it, cost-center by cost-center, to the general ledger for the same period. Are all legitimate costs included? Are the allocations using methodologies that comply with state guidance and that optimize allowable cost capture? Are related-party transactions properly disclosed? This review is best done with someone who knows the specific state's cost report rules, because the allowable costs and allocation methodologies vary significantly from state to state.

The second is MDS accuracy review. Select a sample of 15 to 20 current residents across different payer types and acuity levels. For each resident, compare the most recent MDS to the clinical record. Does the MDS capture all active diagnoses that are documented in the physician orders and nursing notes? Are the Section GG scores consistent with the nursing documentation of what the resident can and cannot do? Are therapy assessments coded to reflect the full scope of documented clinical complexity? A trained MDS reviewer can complete this kind of sampling review in a day and produce a prioritized list of correctable findings.

The third is managed care remittance reconciliation. For each managed care payer, pull the contract rate schedule and the last three months of remittance advice. Do the per-diem rates applied by the MCO match the contracted rates for each level of care? Are authorized services being paid? Are there patterns of underpayment in specific service categories?

This three-part review will not cover every possible reimbursement opportunity, but it will identify the highest-priority issues at most facilities. It typically takes two to four weeks to complete properly and produces findings specific enough to take action on immediately.

The Medicaid rate the facility is receiving represents the state's best calculation based on the information available to it. If that information is incomplete, or if the facility's internal processes are producing documentation that understates care complexity, the rate will be lower than it should be. That is not the state's problem to solve. It is the facility's.