How Dialysis Clinics Can Avoid Medicare Cost Reporting Errors

Medicare cost reporting plays an important role in dialysis facility compliance. Accurate reporting also helps clinics maintain proper reimbursement.

However, cost reports can quickly become complicated. Dialysis clinics manage many expenses, services, supplies, employees, and financial records. As a result, even small reporting errors can lead to bigger problems.

Independent renal dialysis facilities generally use Form CMS-265-11 to report Medicare costs. CMS updated the related instructions and electronic specifications in 2026.

So, dialysis clinics should review their reporting process every year. A structured approach can reduce errors and improve reporting accuracy.

Understand the Applicable Medicare Cost Report

First, determine which cost report applies to your facility.

Independent ESRD facilities generally use Form CMS-265-11. Hospital-based ESRD facilities use the applicable hospital cost report instead.

This distinction matters because each form follows different reporting requirements.

Next, review the current CMS instructions before preparing your report. Do not rely only on last year’s completed report.

CMS periodically updates cost reporting instructions. Therefore, outdated procedures can create avoidable errors.

Maintain Accurate Accounting Records

Strong accounting records form the foundation of an accurate cost report.

Your accounting system should clearly track facility expenses throughout the year. Avoid waiting until year-end to organize supporting records.

Instead, reconcile financial accounts regularly. Then, investigate unusual balances before preparing the Medicare report.

Pay close attention to:

• Payroll expenses
• Medical supplies
• Drugs and biologicals
• Equipment costs
• Rent and facility expenses
• Utilities
• Administrative expenses
• Depreciation
• Professional services
• Home dialysis expenses

CMS requires ESRD facilities to maintain adequate records and appropriate cost reports. The records should support the costs reported to Medicare.

Separate Allowable and Non-Allowable Costs

One common source of errors involves cost classification.

Not every business expense belongs in the medicare cost report . Therefore, clinics should review expenses before assigning them to cost centers.

Start by identifying the Medicare rules that apply to each expense category. Then, compare those rules with your general ledger.

Also, document adjustments clearly. A clear audit trail makes later reviews easier.

Medicare uses reasonable-cost principles to determine allowable costs for outpatient maintenance dialysis.

Reconcile Financial Data With Medicare Data

Your financial statements provide only part of the reporting picture.

Dialysis clinics should also review Medicare-related data before completing the cost report. Compare reported services, treatments, and reimbursement information with internal records.

For example, investigate significant differences between:

• General ledger data
• Treatment records
• Medicare claims
• Statistical information
• Payroll records
• Supply expenses
• Reimbursement reports

A reconciliation process can reveal missing entries or incorrect classifications.

Furthermore, investigate unusual changes from the previous reporting year. Large increases or decreases may require additional documentation.

Review ESRD PPS Requirements

Dialysis clinics also need to understand the ESRD Prospective Payment System.

The ESRD PPS provides a bundled payment for covered renal dialysis services. The bundle can include supplies, equipment, drugs, biologicals, laboratory tests, training, and other services.

Consolidated billing creates another important consideration. Certain services and items fall within the ESRD PPS bundle.

Therefore, clinics should review their billing and cost reporting processes together. This approach can help identify inconsistencies.

CMS also publishes current information about items subject to ESRD PPS consolidated billing.

Avoid Using Outdated CMS Instructions

Medicare reporting rules can change. Therefore, using an old template can increase reporting risk.

Before starting the annual report, check the latest CMS instructions. Review relevant transmittals and electronic reporting specifications.

For example, CMS issued an updated Chapter 42 transmittal for Form CMS-265-11 in April 2026. As a result, dialysis clinics should build an annual compliance review into their reporting process.

Create a Pre-Submission Review

Never submit a Medicare cost report without a detailed final review. Use a checklist to verify important information. Then, compare the final report against the underlying accounting records.

Your review should include:

• Provider information
• Reporting period
• Financial statement totals
• Cost center classifications
• Statistical data
• Medicare-related information
• Adjustments
• Supporting documentation
• Electronic submission requirements
• Required certifications

Additionally, have another qualified person review the report when possible. A second review can identify errors that the original preparer may overlook.

Keep Strong Supporting Documentation

Good documentation helps explain reported amounts. Keep invoices, payroll records, contracts, depreciation schedules, reconciliations, and adjustment details. Organize these documents throughout the year.

Do not depend on memory during cost report preparation. Instead, maintain a consistent documentation process. This saves time and makes future reviews easier. It also helps your team respond to questions about unusual expenses or adjustments.

Monitor Filing Deadlines

Timely filing matters as much as accurate filing. CMS instructions state that independent renal dialysis facilities must submit Form CMS-265-11 by the last day of the fifth month after the cost reporting year ends.

Therefore, clinics should start preparing well before the deadline. Early preparation gives your team time to correct discrepancies. It also reduces last-minute submission pressure.

Work With Experienced Medicare Cost Reporting Professionals

Medicare cost reporting requires more than basic bookkeeping. Dialysis clinics must understand accounting records, Medicare rules, cost classifications, reporting forms, and supporting documentation.

A professional review can identify potential issues before submission. It can also help clinics keep records organized and stay compliant with current CMS requirements.

A specialized cost reporting team can review accounting records, analyze data, prepare cost reports , and address questions that arise during review. These are also services highlighted by NMP Professional Services.

Medicare cost reporting errors can create unnecessary compliance and reimbursement concerns for dialysis clinics. Fortunately, clinics can reduce risk by preparing consistently. Start with accurate accounting records. Then, classify expenses correctly and reconcile financial data. Next, review current CMS requirements. Finally, complete a detailed pre-submission review.

Most importantly, do not treat cost reporting as a year-end task. Build accurate reporting practices into your financial process year-round.

When you need experienced help preparing Medicare cost reports, NMP Professional Services can help your dialysis clinic organize financial data, review reporting requirements, and prepare accurate Medicare cost reports .