FQHCs, RHCs, and Critical Access Hospitals: what each one is and how they differ
The three core rural healthcare designations explained plainly. What qualifies each, how Medicare pays them, who they serve, and which one fits which community.
Frequently asked questions
What is the difference between an FQHC, an RHC, and a Critical Access Hospital?
They are three different federal designations that solve three different rural-access problems. A Critical Access Hospital (CAH) is a small rural hospital (25 or fewer beds) that gets cost-based Medicare reimbursement so it can keep an emergency department open in a community that could not support a full hospital. A Federally Qualified Health Center (FQHC) is a HRSA-funded outpatient primary-care organization (no inpatient beds) that serves underserved populations under Section 330 of the Public Health Service Act, with a governing board and a sliding-fee scale. A Rural Health Clinic (RHC) is an outpatient clinic in a designated rural shortage area that gets enhanced per-visit Medicare reimbursement (the All-Inclusive Rate) but carries no Section 330 grant and no sliding-fee mandate unless it is an NHSC site. CAH is the hospital. FQHC and RHC are clinics with different funding models.
What qualifies a hospital as a Critical Access Hospital?
A CAH must meet CMS criteria: 25 or fewer inpatient beds; an annual average length of stay of 96 hours or less for acute care; 24/7 emergency services; and a location more than 35 miles from the nearest hospital (or more than 15 miles in areas with mountainous terrain or only secondary roads). In exchange, Medicare pays CAHs on a cost basis (101 percent of reasonable costs, before sequestration adjustments) instead of the standard prospective payment rates. A CAH can also operate a distinct-part psychiatric or rehabilitation unit of up to 10 beds each, and run swing beds for skilled-nursing-level care. There are roughly 1,350-plus CAHs operating in the United States.
How does FQHC reimbursement differ from RHC reimbursement?
FQHCs are paid by Medicare under a Prospective Payment System (PPS) rate per visit, and by Medicaid under PPS or a state-approved Alternative Payment Methodology. RHCs are paid an All-Inclusive Rate (AIR) per visit, an interim rate reconciled through annual cost reporting. The RHC AIR is subject to a national cap: for calendar year 2026 the cap is $165 per visit, rising on a set schedule to $190 in 2028 under the Consolidated Appropriations Act of 2021. Some provider-based RHCs attached to hospitals with fewer than 50 beds and certified before December 31, 2020 are grandfathered to uncapped cost-based reimbursement. The structural takeaway: FQHC PPS and RHC AIR both pay a bundled per-visit rate, but the rules, caps, and grant overlays differ.
Do all three serve rural areas?
Not exactly, and this is a common confusion. Critical Access Hospitals are by definition rural; the distance criteria guarantee it. Rural Health Clinics must be in a non-urbanized area that also carries a current shortage designation, so they are rural by rule too. FQHCs are the exception: they serve underserved populations in both urban and rural areas. An FQHC in a dense city neighborhood and an FQHC in a remote county are the same designation. So when people say "rural healthcare services," CAHs and RHCs are inherently rural, while FQHCs are an underserved-population designation that happens to cover a lot of rural ground.
Which designation requires a governing board and a sliding-fee scale?
The FQHC. Section 330 of the Public Health Service Act requires an FQHC to have a governing board with a patient majority (at least 51 percent of board members must be patients of the center) and to operate a sliding-fee discount program based on family income and size. RHCs are not required to charge on a sliding-fee scale unless they are a National Health Service Corps approved site. CAHs, as hospitals, follow hospital governance and Conditions of Participation rather than the Section 330 board and sliding-fee rules. The patient-majority board is one of the most distinctive features of the FQHC model and a frequent finding in HRSA site visits.
Can a clinic be both an RHC and an FQHC?
No, a single site cannot hold both certifications at once; they are mutually exclusive federal designations with different statutes, reimbursement methodologies, and oversight. An organization can, however, operate some sites as RHCs and others as FQHC sites, and clinics do sometimes convert from one model to the other when their patient mix and funding strategy change. The conversion is a real project with eligibility, governance, and cost-reporting implications, not a paperwork swap. If you are weighing it, start from the reimbursement math and the Section 330 obligations, because those are the two things that change the most.
How many FQHCs, RHCs, and CAHs are there in the United States?
Roughly 1,400 HRSA-funded health center organizations operate more than 16,200 FQHC service sites and served over 32 million patients in 2024, the most in the program history. There are roughly 5,200-plus active Rural Health Clinics. And there are roughly 1,350-plus Critical Access Hospitals. These counts shift as facilities open, close, convert, or change designation, so treat them as current-order-of-magnitude figures rather than fixed numbers. The Rural Health Information Hub and HRSA Data Warehouse publish the live counts.
What is a Rural Emergency Hospital, and how does it relate to a CAH?
A Rural Emergency Hospital (REH) is a newer Medicare designation (effective 2023) that a CAH or small rural hospital can convert to. An REH provides 24/7 emergency and outpatient services but no inpatient care, in exchange for a fixed monthly facility payment plus an outpatient add-on. It exists for facilities that can no longer sustain inpatient volume but still need to keep an emergency department open. The conversion is effectively one-way, so it is a serious board-level decision, not a reversible experiment. We cover the financial model and the tradeoffs in a dedicated post.