Paul Sanchez
Medicare and certain private health insurance companies use a diagnosis-related group (DRG) payment system to determine how much they pay for inpatient hospital stays. The DRG system was created to standardize hospital reimbursement and reduce healthcare costs, and it has been used nationally for Medicare reimbursement since 1983. While Medicare's DRG system is called the Medicare severity diagnosis-related group (MS-DRG), other insurers may use their own DRG systems. Medicare Advantage plans, for example, are administered by private insurance companies that may use their own DRGs. The DRG system generally does not affect a patient's out-of-pocket costs, but it can impact the profitability of hospitals.
| Characteristics | Values |
|---|---|
| What is DRG? | Diagnosis-Related Group |
| Who uses DRG? | Medicare and certain private health insurance companies |
| How is DRG used? | To categorize hospitalization costs to determine how much to pay for a patient's hospital stay |
| What does DRG depend on? | Primary and secondary diagnoses, other conditions (comorbidities), age, sex, and necessary medical procedures |
| How does DRG affect payments? | DRG affects the amount Medicare pays the hospital for a patient's treatment, not the amount that the patient pays out-of-pocket |
| How does DRG affect hospitals? | Hospitals decide how much to bill Medicare based on a patient's DRG tier instead of billing for each medical service separately |
| How does DRG affect insurance companies? | Insurance companies are the "secondary payer" after Medicare, and may need to cover the remaining balance after the "primary payer" |
| How does DRG affect patients? | DRG is intended to ensure that patients receive the care they need while avoiding unnecessary charges |
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What You'll Learn
DRG stands for diagnosis-related group
The DRG system changed how Medicare pays hospitals by introducing predetermined payment amounts based on a patient's diagnosis and the treatment they received. This system is known as the Medicare Severity Diagnosis-Related Group (MS-DRG) or Medicare Severity Long-Term Care Diagnosis-Related Groups (MS-LTC-DRG) system. It allows for up to three levels of severity to accurately capture a patient's condition. The MS-DRG system is used under the inpatient prospective payment system (IPPS) and determines a fixed reimbursement rate for each DRG, regardless of the actual costs incurred by the hospital.
The DRG for a patient is determined based on their primary and secondary diagnoses, other health conditions (comorbidities), age, sex, and necessary medical procedures. The system aims to ensure patients receive necessary care while avoiding unnecessary charges. It also encourages hospitals to be more efficient and reduces their incentive to overtreat patients. However, one drawback is the potential for decreased quality of care, as the necessity of tests and procedures is determined by an administrative formula that may not fit every patient's unique needs.
In addition to Medicare, DRGs are also used by other third-party payers, including State Medicaid programs, workers' compensation funds, private insurers like Blue Cross/Blue Shield plans, and self-insured employers. The use of DRGs varies by payer and geographical area, and different DRG systems have been developed to meet the evolving needs of the healthcare industry.
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How DRGs determine hospital payments
DRG stands for diagnosis-related group. Medicare's DRG system is called the Medicare Severity Diagnosis-Related Group (MS-DRG), which is used to determine hospital payments under the inpatient prospective payment system (IPPS). It's a system used to classify diagnoses for inpatient hospital stays into groups and subgroups so that Medicare can accurately pay the hospital bill. The idea behind DRGs is to ensure that Medicare reimbursements adequately reflect "the fundamental role which a hospital’s case mix (the type of patients the hospitals treat, and the severity of their medical issues) plays in determining its costs" and the number of resources the hospital needs to treat its patients.
The DRG system was introduced in the 1980s to standardize hospital reimbursement and control costs while encouraging hospitals to provide care more efficiently. Before the DRG system, hospitals would send a bill to Medicare or an insurance company that included charges for every item used and every day spent in the hospital, incentivizing hospitals to keep patients for longer and perform unnecessary procedures. The DRG system encourages hospitals to be more efficient and reduces their incentive to overtreat patients.
When a patient with Medicare or certain types of private insurance is hospitalized, a DRG code is assigned based on their condition. There are numerous factors that go into determining the DRG for each patient, including their primary and secondary diagnoses, other conditions (comorbidities), age, sex, and necessary medical procedures. Each DRG has a different relative weight, depending on the average amount of resources required to provide care for someone with that DRG. The higher the relative weight, the more resources are required, and the more expensive the treatment.
To determine how much a hospital gets paid for a particular hospitalization, you need to know the DRG assigned and the hospital's base payment rate or "payment rate per case." The hospital gets paid a fixed amount for that DRG, regardless of how much money it spent treating the patient. If the hospital spends less money treating the patient than it receives for the DRG, it makes a profit, and if it spends more, it loses money.
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Medicare's DRG system
When a patient with Medicare is admitted to a hospital as an inpatient, a DRG code is assigned based on their condition, primary and secondary diagnoses, other conditions (comorbidities), age, sex, and necessary medical procedures. The hospital then receives a predetermined fixed payment amount for that DRG from Medicare, regardless of the actual cost of treatment. If the hospital treats the patient for less than the DRG payment amount, it makes a profit, and if it spends more, it loses money. The baseline DRG costs are adjusted annually to reflect changes in treatment patterns, technology, and other factors influencing the use of hospital resources.
The DRG system was implemented to control healthcare costs and encourage hospitals to operate more efficiently, reducing the incentive to overtreat patients. It replaced the previous "cost-based" reimbursement system, where hospitals billed Medicare for each individual service and supply provided during a patient's stay, creating an incentive to prolong hospital stays and perform unnecessary procedures. The DRG system is intended to standardise reimbursement, avoid unnecessary charges, and ensure patients receive the care they need without unnecessary tests and treatments.
In addition to Medicare, certain private health insurance companies and other third-party payers also utilise the DRG system or adaptations of it. This includes State Medicaid programs, workers' compensation systems, private insurers like Blue Cross/Blue Shield plans, and self-insured employers. The 21st Century Cures Act, enacted in 2016, expanded the DRG system to include outpatient surgeries, with Medicare and private insurers piloting new payment systems that combine inpatient and outpatient services into bundled payments.
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Other insurers that use DRGs
Medicare's DRG system, called the Medicare Severity Diagnosis-Related Group (MS-DRG), is used to determine hospital payments for inpatient hospital stays. The system is designed to ensure that reimbursements accurately reflect the type of patients treated and the severity of their medical issues, along with the resources required for their treatment.
While Medicare's DRG system is well-established, other insurers have also adopted DRGs in their payment systems. Here are some examples of other insurers that utilize DRGs:
- State Medicaid Programs: Twenty-one states have been identified as using DRGs for their Medicaid programs. These states employ DRGs as a unit of payment for hospital care, with variations in the extent of DRG usage.
- Workers' Compensation Programs: DRGs are currently used by workers' compensation funds in three states. These states have implemented DRGs in their payment systems for workplace injury claims.
- Blue Cross/Blue Shield Plans: Blue Cross/Blue Shield Association (BCBSA) member plans account for a significant portion of the private insurance market. More than half of BCBSA member plans utilize DRGs in their payment systems.
- Managed-Care Organizations and HMOs: Managed-care organizations, including Health Maintenance Organizations (HMOs), are increasingly adopting DRGs. The Group Health Association of America (GHAA) identified 64 HMOs that use DRGs, with 36 of them employing DRGs for more than 50% of their cases.
- Commercial Insurers: Some commercial insurers have incorporated DRGs into their managed-plan products. These insurers have implemented DRGs as a framework for hospital reimbursement.
- Self-Insured Employers and Employer Coalitions: Several self-insured employers and employer coalitions have adopted DRG-based payment systems. These organizations often have tailored approaches to DRG usage, demonstrating the flexibility of DRG implementation.
- Federal Government Organizations: Various Federal Government organizations, such as the Department of Defense (DoD) and the Department of Veterans Affairs (DVA), utilize DRGs in their healthcare programs.
It is important to note that the usage and implementation of DRGs by these insurers may vary, and there is no single dominant approach. The DRG system has been adapted to suit the specific needs and contexts of each insurer, demonstrating its versatility and potential for customization.
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Pros and cons of the DRG system
The DRG system, or Diagnosis-Related Group, is a classification system used by Medicare and other insurers to determine how much to reimburse hospitals for patient care. The system is intended to ensure that patients receive the care they need while avoiding unnecessary charges.
Pros of the DRG System
- Standardization of Care: DRGs help standardize care across different hospitals, making it easier for patients to compare the quality of care they can expect to receive.
- Improved Communication: The use of DRGs can improve communication and coordination between healthcare providers by providing a common framework for understanding patient needs and treatment plans.
- Cost Reduction: DRGs provide a way to compare the costs of care across different hospitals, enabling insurance companies and regulators to manage expenses better.
- Efficiency and Transparency: The DRG system encourages hospitals to be more efficient by reducing their incentive to overtreat patients or keep them hospitalized longer than necessary. It also enhances transparency in hospital activities and costs.
- Quality of Care: By providing a framework for categorizing and treating patients, DRGs can help improve the overall quality of care and patient safety.
Cons of the DRG System
- Provider Burnout: The pressure to meet the targets and expectations set by DRGs may lead to increased stress and burnout among healthcare providers.
- Rationing of Care: Some critics argue that DRGs may lead to the rationing of care, potentially resulting in sub-standard treatment for patients.
- Complexity: DRGs can be complex and difficult for patients to understand, making it challenging for them to know how much their hospital stay will cost and how much the hospital will be reimbursed.
- Inadequate Reimbursement: The DRG system may not adequately reimburse hospitals for treating patients with complex or unusual conditions that require more resources than the DRG reimbursement covers.
- Lack of Transparency: In some cases, the DRG-based payment model has been criticized for lacking transparency in cost control and the allocation of resources, making it challenging for managers and regulators to effectively oversee hospital finances.
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Frequently asked questions
DRG stands for diagnosis-related group.
The DRG system was developed to determine how much Medicare pays the hospital for each "product", as patients within each category are clinically similar and are expected to use the same level of hospital resources. The DRG system encourages hospitals to be more efficient and reduces their incentive to overtreat patients.
Medicare determines your DRG based on your main diagnosis and up to 25 other related diagnoses, and the hospital then charges Medicare based on this classification. You’re placed in a tier with other people who have similar clinical profiles and treatment expenses.
Yes, the 21st Century Cures Act, enacted in late 2016, required the Centers for Medicare and Medicaid Services to develop some DRGs that apply to outpatient surgeries.
No, Medicare's DRG system does not apply to all insurers. However, a wide variety of other third-party payers for hospital care have adapted elements of this system for their own use.
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