Medicaid reimbursement rates are determined by individual states, within a framework of federal rules that set minimum standards and require public transparency. Unlike Medicare, which uses a single national fee schedule, Medicaid gives each state wide latitude to design its own payment methods and set its own prices for nearly every type of service. The result is significant variation: nationally, Medicaid pays physicians about 75% of what Medicare pays for primary care, but some states pay far less and others pay more.
The Federal Framework States Must Follow
Federal law does not tell states exactly what to pay. Instead, it sets guardrails. Section 1902(a)(30)(A) of the Social Security Act requires that Medicaid payments be “consistent with efficiency, economy, and quality of care” and “sufficient to enlist enough providers so that care and services are available” to beneficiaries at least to the same extent they’re available to the general population. That language is deliberately broad, and for decades it gave states enormous flexibility with limited federal oversight.
For hospitals and nursing facilities specifically, federal law requires a public process. States must publish their proposed rates along with the methodology and justification behind them, give providers, beneficiaries, and the public an opportunity to comment, and then publish the final rates. Hospital rates must also account for facilities that serve a disproportionate share of low-income patients.
A major 2024 rule from the Centers for Medicare and Medicaid Services (CMS) tightened these requirements considerably. Starting in 2026, every state must publish a comparative analysis showing how its Medicaid payment rates for key physician services stack up against Medicare rates. States must also disclose payment rates for home and community-based services like personal care, home health aides, and habilitation. These analyses must be updated at least every two years. The rule also created a more structured review process for any state proposing to cut or restructure its rates.
How States Set Physician and Outpatient Fees
Most states pay physicians and other outpatient providers through a fee schedule, a list of services paired with a dollar amount for each one. States typically build these schedules by starting with Medicare’s relative value system, which assigns a weight to each service based on the time, skill, and overhead it requires, and then applying a lower conversion factor. That conversion factor is where most of the gap between Medicaid and Medicare originates.
How large that gap is depends entirely on the state. The KFF Medicaid-to-Medicare Fee Index, which compares payment levels using a standardized set of primary care services, puts the national average at 0.75, meaning Medicaid pays 75 cents for every dollar Medicare pays. Some states cluster near parity while others fall well below that average. Tennessee doesn’t even maintain a traditional fee-for-service program, running its entire Medicaid system through managed care instead.
During 2013 and 2014, the Affordable Care Act temporarily required states to pay primary care physicians (in family medicine, internal medicine, and pediatrics) at least 100% of Medicare rates, with the federal government covering the difference. That provision expired, and most states reverted to their previous, lower payment levels.
Hospital Payment Methods
States use several different approaches to pay hospitals for inpatient stays. The most common is a diagnosis-related group (DRG) system, similar in concept to what Medicare uses. Each hospital admission is classified into a group based on the patient’s diagnosis and the procedures performed, and each group carries a payment weight. The state multiplies that weight by a base rate to produce the payment for that stay.
Other states pay hospitals a flat amount per day (a per diem rate), a flat amount per discharge regardless of diagnosis, or through cost-based reimbursement where the state pays a share of the hospital’s actual reported costs. Some states blend these approaches or use variations unique to their program.
Within DRG systems, states also build in outlier payments for unusually expensive cases. To determine whether a case qualifies, states typically take the hospital’s billed charges and multiply them by a cost-to-charge ratio derived from the hospital’s financial reports. If the estimated cost exceeds the DRG payment by a set threshold, the state pays an additional amount. States like Arizona, Kansas, Massachusetts, Mississippi, and Montana all use this cost-to-charge approach, though each applies it with slightly different mechanics.
Nursing Facility Rates
Medicaid is the dominant payer for long-term nursing home care, and most states pay facilities a daily rate. The majority of states set that rate based on each facility’s reported costs, broken into categories: direct care (nursing staff wages and medical supplies), indirect care (social services and patient activities), administration, and capital expenses like building maintenance and equipment.
These cost-based systems don’t simply reimburse whatever a facility spends. States define which costs are allowable and cap reimbursement for each category, often at a percentage of the median or average cost among similar facilities in the state. A nursing home spending well above the state median on administration, for example, would absorb the excess cost itself.
Less than a third of states use a price-based method instead, setting rates prospectively using historical costs adjusted for inflation and other factors. Price-based systems give facilities more predictability but less direct connection between their current spending and their current payment.
Managed Care and Capitation Rates
More than two-thirds of Medicaid beneficiaries are now enrolled in managed care plans rather than traditional fee-for-service. In managed care, the state doesn’t pay providers directly for each service. Instead, it pays a managed care organization (MCO) a fixed monthly amount per enrollee, called a capitation payment. The MCO then builds its own provider network and negotiates its own rates with hospitals, doctors, and other providers.
The capitation rates states pay to MCOs must meet a federal standard called actuarial soundness. This means the rates must be developed using generally accepted actuarial principles, be appropriate for the population and services covered, and be projected to cover all reasonable and attainable costs the MCO will face during the contract period. A certified actuary must attest that the rates meet this standard, and federal actuaries at CMS review the documentation before approving them.
Capitation rates are typically set for a 12-month period and don’t change during that window regardless of what actually happens with healthcare costs or utilization. This shifts financial risk from the state to the MCO, which is one reason states have moved so aggressively toward managed care. The rates MCOs then pay to individual providers are a separate negotiation entirely, and they can vary widely from the state’s fee-for-service schedule.
Supplemental Payments for Hospitals
Beyond standard per-service payments, states make billions of dollars in supplemental payments to hospitals. The largest category is Disproportionate Share Hospital (DSH) payments, which federal law requires states to distribute to hospitals serving large numbers of Medicaid and uninsured patients. Each state receives an annual DSH allotment that caps the total federal share of these payments. At the individual hospital level, DSH payments cannot exceed the hospital’s uncompensated care costs: the cost of serving Medicaid and uninsured patients minus all payments already received for those patients.
States must submit independently certified audits of DSH payments to the federal government. A methodology finalized in 2019 calculates required reductions to state DSH allotments using five factors, including the state’s uninsured population, Medicaid patient volume, and uncompensated care levels. Legislation effective in 2021 further refined the hospital-specific limit to focus on cases where Medicaid is the primary payer, with an exception for hospitals in the 97th percentile or above for serving Medicare beneficiaries who also receive supplemental security income.
Prescription Drug Reimbursement
Prescription drugs follow a unique reimbursement model built around mandatory rebates from manufacturers. States pay pharmacies for dispensing drugs, typically based on a benchmark like the average acquisition cost plus a dispensing fee. But the net cost to the Medicaid program is significantly lower because of the Medicaid Drug Rebate Program, which requires manufacturers to pay rebates back to the state and federal government as a condition of having their drugs covered.
For brand-name drugs, the minimum rebate is the greater of 23.1% of the Average Manufacturer Price (AMP) or the difference between the AMP and the lowest price the manufacturer offers to any purchaser. That rebate is then adjusted upward using the Consumer Price Index if the drug’s price has risen faster than inflation since it came to market. Pediatric-only drugs and blood clotting factors have a lower minimum rebate of 17.1% of AMP. Generic drugs follow a simpler formula with a flat 13% minimum rebate. For reformulated versions of existing brand-name drugs (known as line extensions), the rebate calculation is designed to prevent manufacturers from avoiding higher rebates by releasing a new formulation.
Why Federal Matching Rates Matter
Every dollar a state spends on Medicaid is partially matched by the federal government through the Federal Medical Assistance Percentage, or FMAP. The formula is designed so that poorer states receive a higher federal match. The statutory floor is 50%, meaning the federal government always pays at least half, and the ceiling is 83%. A state’s FMAP is recalculated annually based on its per capita income relative to the national average.
This matching structure directly shapes how states think about reimbursement rates. In a state with a 70% FMAP, every additional dollar paid to a provider costs the state only 30 cents, with the federal government covering the rest. That makes rate increases less painful in poorer states and relatively more expensive in wealthier states that receive only the 50% minimum match. It also means federal policymakers have significant leverage: when they increase the FMAP temporarily during recessions or public health emergencies, states gain fiscal room to maintain or raise provider payments rather than cut them.