The hospital chargemaster is core to revenue cycle management (RCM) and the financial success of any hospital—even critical access hospitals (CAHs). An up-to-date, accurate chargemaster will help hospitals prevent revenue leakage, avoid compliance risks and manage the cost-to-charge ratio (CCR).
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How Significant is the Revenue Leakage?
Revenue leakage is hardly pocket change to hospitals. Industry estimates from the Medical Group Management Association (MGMA) and Healthcare Financial Management Association (HFMA) suggest providers lose 1% to 11% of net patient revenue annually to underpayments from commercial payors, according to a March 2026 report in Becker’s Hospital Review.
According to the American Hospital Association, in 2024, Medicare underpayments amounted to over $100 billion, stemming from average reimbursements of just 83 cents on the dollar.
A common reason for underpayments is an inadequate chargemaster.
How Does This Impact CAHs?
Although CAHs are generally reimbursed at 101% of costs for traditional Medicare coverage, these small and often rural hospitals are not immune to underpayment. The 101% rule does not apply to Medicare Advantage plans, which often negotiate lower rates with CAHs, not all hospital expenses are reimbursed at 101% of costs and federal sequestration rules cut 2% from all Medicare payments.
Securing appropriate reimbursement is vital for all CAHs.
Because the Centers for Medicare & Medicaid Services (CMS) uses hospital 
cost reports to set reimbursement rates for CAHs, maintaining an accurate chargemaster ensures that the volume and types of supplies and procedures are properly recorded so these items can be appropriately claimed on the cost report.
The CCR, which measures the hospital’s markup of its costs for supplies and procedures, is an indicator of whether a hospital is covering the full costs of delivering care. Cost-to-charge ratios should be reviewed regularly to ensure that charges align as closely as possible with costs. A low CCR indicates a high markup, a possible compliance risk, while a high CCR means the hospital might be leaving money on the table.
An accurate chargemaster will align list prices for supplies and services with the actual costs of those services. Unfortunately, if not well managed, chargemasters can become outdated or contain errors, leading to lost revenue.
What Are Common Problems with the Chargemaster?
Revenue leakage often results from errors and poor practices with the chargemaster. Examples include:
Outdated codes: Billing codes are updated regularly by CMS and other agencies. Claims with outdated codes, derived from the chargemaster, are automatically rejected.
Missed charges: Supplies that are not mapped to the correct charge code will result in a missed charge and will not be billed.
Missed supplies and services: Clinical departments might add supplies or services without notifying the central billing office, meaning these items will not be added to the chargemaster and costs, therefore, are not adequately represented.
What Are Key Steps to Successful Chargemaster Management?
Maintaining an updated and accurate chargemaster is a foundational part of revenue cycle management. Finance leaders should take proactive steps to ensure their organization’s chargemasters accurately represent the full costs of supplies and services provided to patients.
Recommended steps are:
- Use a team approach: A multi-disciplinary team can develop internal
best practices, such as aligning the chargemaster with carve-outs for specific codes in payor contracts, according to a report from HFMA. The team should include representatives from finance, patient financial services, health information management (HIT), compliance and each ancillary department, such as lab, radiology and pharmacy. - Conduct regular audits: Chargemaster line items should be reviewed regularly to ensure alignment with current industry standards, prevent missed charges and reconcile charge captures.
- Conduct a compliance review: A review will help a hospital identify outdated codes and pricing that expose providers to compliance risks and reimbursement vulnerabilities.
- Consider medical coding support: Existing hospital staff can be supplemented with inpatient, outpatient and professional fee coding to ensure correct billing tied to chargemaster codes.
- Leverage technology: Use automated tools to help the chargemaster stay current on coding and regulatory updates and changes. Technology can also be used to assess the CCR for each department by reviewing claims data and identifying anomalies where cost and charge data do not align with expectations.
What's Important to Keep in Mind?
Being aware of your CAH’s CCR is important in identifying whether your hospital is being properly reimbursed for the cost of its supplies and services. If the gap between what supplies and services cost and what your hospital is charging is too wide, the chargemaster can be part of the problem.
Maintaining a clean chargemaster is not a “some time” activity. The hospital chargemaster must be a priority with responsibility clearly defined and assigned. Collaboration between billing and clinical departments will contribute to successful maintenance of the chargemaster.
There are many areas within the revenue cycle that can lead to revenue loss; the chargemaster should not be overlooked in the quest to stop the leaks. With proper attention and appropriate tools, practices should be reviewed regularly to ensure those areas where leakage occurs can be fixed and precious revenue protected.
Ready to See Where Your Chargemaster Stands?
Talk to JTS Health Partners to see how we can help your team close the cost-to-collect ratio gap.
