Community health centers pull funding from a mix of federal grants, insurance reimbursements, drug discount programs, and state or local support. No single source covers the full cost of operations. Medicaid is the largest revenue stream, accounting for about 43 percent of operating revenue on average, while federal grants make up roughly 30 percent. The rest comes from Medicare, private insurance, patient fees, pharmaceutical program revenue, and smaller contributions from state and local governments.
In 2024, federally funded health centers served over 32.3 million patients at an average cost of about $1,565 per patient. Understanding where that money comes from helps explain both why these centers exist and why their funding is a persistent source of political debate.
Federal Grants Through Section 330
The backbone of health center funding is the Section 330 grant, authorized under the Public Health Service Act. These grants flow through the Health Resources and Services Administration (HRSA) and provide what’s called “operational support,” meaning they help cover the basic costs of keeping a health center running: staff salaries, facility expenses, outreach, and enabling services like translation or transportation that help patients actually get care.
To receive Section 330 funding, an organization must be a domestic public or nonprofit entity. Faith-based organizations, tribes, and tribal organizations also qualify. Grant recipients must demonstrate they can make primary care accessible in a defined service area, particularly for medically underserved populations. These grants come with significant strings attached, including requirements around governance, services offered, and financial accountability.
The federal grant share of total health center revenue has been declining over time. In 2010, grants made up 38 percent of total revenue. By 2018, that figure had dropped to about 30 percent. That shrinking share means health centers have become increasingly dependent on other revenue streams to stay afloat.
Medicaid and Medicare Reimbursements
Insurance reimbursements, especially from Medicaid, form the single largest funding category. Medicaid alone accounts for 43 percent of the average health center’s operating revenue. This makes health centers deeply vulnerable to any policy changes that reduce Medicaid enrollment. A 2025 Commonwealth Fund analysis estimated that new Medicaid work requirements could cause nearly 5.6 million health center patients to lose coverage, with potential revenue losses reaching $32 billion.
Medicare payments work through a prospective payment system (PPS) that took effect in October 2014 under the Affordable Care Act. Rather than billing for each individual service, health centers receive a set national rate per visit, adjusted for geographic location. When a patient is new to the health center or receives a preventive wellness visit, the rate increases by about 34 percent. This per-visit model gives health centers predictable income from Medicare but doesn’t always cover the full cost of complex visits where multiple issues are addressed.
Private insurance rounds out the payer mix, though it typically represents a smaller share than public insurance given the patient populations health centers serve.
The Sliding Fee Scale
Every federally funded health center is required to see patients regardless of their ability to pay. To make this work financially, they operate a sliding fee discount schedule tied to income.
The structure breaks down into clear tiers. If your household income falls at or below 100 percent of the federal poverty level, you receive a full discount and pay nothing, or at most a nominal charge. Between 100 and 200 percent of the poverty level, you pay a reduced fee based on your income, with at least three discount tiers in that range. Above 200 percent of the poverty level, you pay the full fee. Health centers set their base fees to reflect locally prevailing rates and cover their reasonable costs of operation.
This sliding scale is one of the defining features of community health centers, but it also creates a structural funding gap. Uninsured patients on full or partial discounts generate little or no revenue, which is exactly why federal grants and other funding sources are so critical.
The 340B Drug Pricing Program
One of the less visible but increasingly important revenue streams comes from the 340B Drug Pricing Program. This federal program requires pharmaceutical manufacturers to sell drugs to qualifying health centers at steep discounts. The health center can then dispense those medications to patients at standard reimbursement rates, keeping the difference as revenue.
That spread between discounted purchase price and normal reimbursement generates what’s called gross profit, and health centers use it to fund services that would otherwise operate at a loss. Research has documented 340B revenue paying for harm reduction programs, hepatitis C clinics, and in one case covering more than 90 percent of the salaries for nurses, social workers, and therapists. FQHCs have described 340B revenue as essential to filling the funding gaps created by their mandated sliding fee discounts and their provision of low-profit services to underserved populations.
The program has limited reporting requirements, meaning there’s no standardized tracking of how much money health centers generate from 340B or exactly how they spend it. The profit margin is also sensitive to fluctuations in drug prices set by manufacturers, making it a somewhat unpredictable revenue source. Still, studies consistently find that 340B participation is an important factor in health center financial sustainability.
State and Local Government Funding
Some health centers receive grants from state or local governments, but this funding is modest compared to federal sources. These grants are particularly important for health centers that serve large uninsured populations, since state and local dollars can help offset the cost of providing discounted or free care. However, the capacity of states and localities to support health centers varies widely. In areas with tighter budgets, this funding may be minimal or nonexistent.
Health centers that operate without federal Section 330 grants, sometimes called “look-alikes,” rely more heavily on state and local grants to meet the same federal requirements around affordable care for uninsured and underinsured patients.
Capital Funding for Facilities
Day-to-day operating funds don’t cover the cost of building new clinics or renovating aging ones. For those needs, HRSA offers separate capital development grants designed to help health centers expand their physical capacity. These grants support construction, renovation, and equipment purchases that allow centers to serve more patients or offer new services. Capital funding tends to come in targeted rounds rather than as ongoing support, making it competitive and often insufficient to meet the full scope of infrastructure needs across the national network of health centers.
Why the Funding Mix Matters
The patchwork nature of health center funding means that changes to any single source can ripple through the entire system. A reduction in Medicaid enrollment shrinks the largest revenue stream. Cuts to Section 330 grants eliminate the flexible dollars that subsidize care for uninsured patients. Changes to 340B drug pricing rules can undermine the programs that health centers fund through pharmaceutical margins.
This interconnected funding structure is what allows health centers to serve over 32 million people a year, including large numbers of uninsured and publicly insured patients, at a relatively low per-patient cost. It’s also what makes them financially fragile when any one piece shifts.