Reimbursement is the process by which a healthcare organization gets paid for the services it provides to patients. It sounds simple, but reimbursement shapes nearly every decision a hospital or medical practice makes, from which services it offers to how many staff it employs to whether it stays open at all. Unlike most businesses that set a price and collect payment at the point of sale, healthcare organizations deliver care first and then navigate a complex system of insurance claims, government payment rules, and patient billing to recover their costs.
How Healthcare Reimbursement Actually Works
When a patient receives care, the organization doesn’t simply send an invoice and wait for a check. The payment process, known as revenue cycle management, begins before the patient even arrives. It starts with scheduling and verifying insurance coverage, continues through treatment and documentation, then moves into coding, claim submission, and collections. Each step carries the risk of delays or lost revenue if something goes wrong.
Every diagnosis, procedure, and service must be translated into standardized codes. These codes determine how much the organization can bill and how much an insurer will pay. Errors in coding are one of the most common reasons payments get held up or denied entirely. After coding, the organization submits claims to insurance companies or government programs. If the claim is accepted, payment arrives weeks or sometimes months later. If denied, staff must investigate, correct, and resubmit.
The scale of claim denials is staggering. In Massachusetts, insurers denied roughly one out of every five claims submitted in 2024, an average denial rate of 20.4%. Out of 45.9 million total claims, over 9 million were denied. The vast majority of those denials were administrative: 5.4 million claims were rejected because providers didn’t meet insurer rules around timely filing or correct documentation, and another 2.2 million were denied for being incomplete, containing coding errors, or being duplicates. These aren’t cases where care was inappropriate. They’re paperwork problems that eat into revenue and require staff time to resolve.
The Main Payment Models
Healthcare organizations receive payment through several different structures, and the model used determines both the amount of revenue and the financial incentives that guide care delivery.
Fee-for-Service
The traditional model is fee-for-service, where the organization bills a set amount for each individual service performed. An office visit generates one payment, a blood test another, an X-ray another. This model rewards volume: the more services provided, the more revenue earned. Private insurers often negotiate fee-for-service rates directly with providers, and those rates vary widely depending on the insurer’s market share and the organization’s leverage in negotiations. Some contracts peg rates to a percentage of what Medicare pays, while others use independent fee schedules. Contracts may also give the insurer the ability to adjust rates, making it important for organizations to understand the terms before signing.
Fixed-Rate Hospital Payments
For inpatient hospital stays, Medicare uses a system called Diagnosis Related Groups. Instead of paying for each individual service during a hospitalization, the hospital receives a single fixed payment based on the patient’s diagnosis and the typical resources that diagnosis requires. A hip replacement generates one payment amount regardless of whether the patient stays three days or five. Congress introduced this system nationally in 1983, and it fundamentally changed hospital economics. If a hospital can treat a patient efficiently and discharge them sooner, it keeps the difference. If complications drive up costs beyond the fixed payment, the hospital absorbs the loss.
Value-Based Payment
A growing share of healthcare payments now ties reimbursement to quality and outcomes rather than the number of services delivered. These value-based models range from simple bonuses for meeting quality targets to arrangements where organizations share in the savings they generate, or even take on financial risk if costs exceed benchmarks. As of the most recent data, 28.5 percent of U.S. healthcare payments flowed through contracts that included downside financial risk for providers, up from 24.5 percent in 2022. The shift is gradual but accelerating, and it requires organizations to invest in data tracking, care coordination, and preventive services that weren’t priorities under fee-for-service.
Where the Money Comes From
Most healthcare organizations receive payment from a mix of government programs and private insurance, and the rates differ dramatically between them. Medicare, the federal program covering adults 65 and older, sets its physician payment rates through a fee schedule updated annually. The 2024 conversion factor (the base dollar amount used to calculate payments) was $33.29, reflecting a 2.93 percent increase enacted by Congress. These rates are non-negotiable. Organizations either accept them or don’t participate in Medicare.
Medicaid, which covers low-income populations, typically reimburses at even lower rates than Medicare. Private insurance generally pays the most, which is why a hospital’s payer mix (the proportion of patients covered by each type of insurance) has an outsized effect on its bottom line. Hospitals that serve a higher share of Medicare and Medicaid patients receive lower reimbursement per patient compared to those with a larger privately insured population.
Why Reimbursement Determines Financial Survival
Reimbursement isn’t just a revenue stream. It’s the factor that most directly determines whether a healthcare organization operates at a surplus or a deficit, and which services it can afford to provide. Research published in JAMA Network Open found that hospitals in the top tier of undercompensated care (meaning they provided more care than they were reimbursed for) had operating margins 6.2 percentage points lower than hospitals with the least undercompensated care. Hospitals with the highest levels of uncompensated care, services for which they received no payment at all, saw margins 3.4 percentage points lower.
These aren’t abstract numbers. Lower margins translate directly into fewer resources for staffing, equipment, and facility maintenance. Hospitals providing burn services, inpatient psychiatric care, and primary care each saw significantly lower operating margins, by 3.0, 2.6, and 1.6 percentage points respectively. These are essential services that communities depend on, but they’re often poorly reimbursed. Hospitals with the highest levels of uncompensated care showed greater financial instability, with nearly 75 percent of those in the top tier meeting criteria for financial vulnerability. When reimbursement consistently falls short of costs, hospitals cut services or close entirely, and the communities they serve lose access to care.
Some hospitals receive special designations that boost their payments. Critical Access Hospitals and Sole Community Hospitals, for example, receive about 25 percent more in reimbursement than they would without those designations, specifically because they serve areas where no other hospital is available and standard payment rates wouldn’t sustain operations.
The Gap Between Cost and Payment
One of the most important things to understand about healthcare reimbursement is that payment often doesn’t cover the full cost of care. Uncompensated care, which includes charity care for uninsured patients and bad debt from unpaid bills, totaled $41.9 billion across U.S. hospitals in fiscal year 2020. Government programs partially offset this through supplemental payments to hospitals that serve a high share of low-income patients, but the relationship between those supplemental funds and actual need is weak. The Medicaid and CHIP Payment and Access Commission has repeatedly found little meaningful connection between the supplemental payments states receive and the number of uninsured individuals or the actual uncompensated care costs hospitals face.
This means that for many organizations, the patient’s share of the bill has become increasingly important to collect. After insurance pays its portion, remaining balances fall to patients in the form of copays, deductibles, and coinsurance. Collecting these amounts requires persistent follow-up through automated reminders, texts, and emails, and many organizations struggle with this final step of the revenue cycle.
What This Means for How Care Is Delivered
Reimbursement doesn’t just fund healthcare. It shapes it. Under fee-for-service, organizations have a financial incentive to provide more services, which can lead to unnecessary testing or procedures. Under value-based models, the incentive flips toward keeping patients healthy and out of the hospital, since the organization’s revenue depends on outcomes rather than volume. Neither model is perfect, and most organizations currently operate under a blend of both.
The practical result is that reimbursement influences which specialists a hospital recruits, which service lines it expands or eliminates, how aggressively it invests in preventive care, and how much administrative staff it needs just to process claims and chase denied payments. For healthcare organizations, reimbursement is not a back-office function. It is the financial architecture on which every clinical and operational decision rests.