Rural Emergency Hospital (REH) Designation Requirements

A Rural Emergency Hospital (REH) is a Medicare provider category created for facilities that can no longer sustain a full inpatient service line but still need to keep 24-hour emergency and outpatient care in the community. For a patient-safety officer, infection preventionist, quality director, or risk manager evaluating whether their facility should pursue REH conversion — or already works at one — the designation is not just a billing classification. It resets the scope of what the facility is licensed to do, changes what has to be monitored and reported, and creates a hard operational clock that safety and quality staff, not just finance, have to manage.

Who Can Convert to REH Status

REH status was created by Section 125 of the Consolidated Appropriations Act, 2021 (P.L. 116-260) and became effective January 1, 2023. Eligibility is limited to:

• Critical Access Hospitals (CAHs).
• Rural acute-care, tribally-operated, and Indian Health Service hospitals with 50 or fewer beds that were open on December 27, 2020.
• Facilities that met the bed-count and rural criteria but closed after that date may also apply to convert.

A hospital that already has more than 50 beds, or was never rural or a CAH, cannot become an REH — there is no size-reduction path into the designation. Conversion requires enrolling under the REH Conditions of Participation at 42 CFR Part 485, Subpart E and is voluntary; it is not something CMS or a state survey agency imposes.

The Service-Scope Restriction: No Inpatient Beds, With One Exception

The defining trade CMS built into the REH designation is this: an REH gives up inpatient acute care in exchange for the payment structure described below. The Conditions of Participation are explicit that an REH cannot maintain inpatient beds, with a single carve-out — a distinct part unit (DPU) separately licensed as a skilled nursing facility. That DPU is a different regulatory instrument than the swing-bed arrangement most CAHs already use for post-acute SNF-level care under their inpatient CAH status; a swing bed is not something an REH can operate, because it depends on the facility having inpatient status to swing from. An REH that wants to keep offering SNF-level post-acute care has to stand up and separately certify a DPU, not just repurpose existing beds.

For a quality or infection-prevention program, this restriction changes what “the hospital” actually is from a surveillance standpoint. There is no acute inpatient unit generating ICU-style device-associated infection data under the hospital NHSN modules; a certified SNF DPU, if the facility operates one, is tracked under long-term-care surveillance conventions instead. Programs built around inpatient HAI reporting categories (CLABSI, CAUTI surveillance tied to inpatient bed-days) need to be re-scoped, not just scaled down, once inpatient status disappears.

The 24-Hour Annual Average Length-of-Stay Rule

An REH is capped at an annual average length of stay of 24 hours per patient, measured from registration through discharge. This is an annual average across the facility’s patients, not a hard per-patient ceiling — a single patient who needs 30 hours before a safe transfer does not, by itself, put the facility out of compliance. What it does mean operationally:

• Transfer and discharge-planning protocols carry more weight than they would at a CAH or acute hospital, because there is no inpatient bed to absorb a patient who needs longer observation or stabilization — the facility’s only options are discharge, a certified SNF DPU (if it operates one), or timely transfer.
• The metric is a trend a risk manager or quality director should track continuously, not check retrospectively at year-end. A pattern of extended boarding — behavioral-health holds awaiting placement are a common driver nationally — can push the annual average up gradually in a way that is easy to miss until it is already a problem.
• EMTALA screening, stabilization, and transfer obligations apply to REHs exactly as they do to any hospital with a dedicated emergency department — the 24-hour rule constrains where a patient can be held afterward, it does not relax the underlying screening and stabilization duty.

Required Services Under the REH Conditions of Participation

Beyond the bed restriction and length-of-stay cap, 42 CFR Part 485 Subpart E requires an REH to furnish, at minimum, 24-hour emergency services, laboratory services, diagnostic imaging, pharmacy services, and discharge planning. Behavioral health and rehabilitation services are commonly offered on an outpatient basis but are optional, not required. As with CAH and hospital Conditions of Participation generally, meeting these requirements is what makes accreditation-based deemed status available through a CMS-approved accrediting organization — accreditation is layered on top of the CoPs, not a substitute for them.

The Payment Trade-Off: What Conversion Actually Changes Financially

An REH is paid on two tracks instead of the CAH’s cost-based model:

• Outpatient services are paid at the Medicare Outpatient Prospective Payment System (OPPS) rate plus 5%, replacing the CAH’s cost-based reimbursement (generally 101% of reasonable cost) for outpatient care.
• A fixed monthly facility payment, unrelated to volume — $285,625.90 per month in 2025 — adjusted each year by the same percentage as the hospital market basket update.

The trade-off this creates is straightforward to describe and harder to evaluate case by case: a facility gives up cost-based reimbursement and inpatient revenue (however small) in exchange for a predictable, volume-independent monthly payment plus a fee-schedule uplift on outpatient care. For a CAH whose inpatient beds already run at low, marginal occupancy, the fixed monthly payment can exceed what those beds were actually contributing after cost-reimbursement true-ups — conversion captures guaranteed revenue instead of thin, cost-based inpatient margin. For a facility that still depends on genuine inpatient census, or on swing beds for post-acute SNF care it is not prepared to re-stand-up as a certified DPU, the loss of inpatient status is a real service-line and continuity-of-care cost that the fixed payment may not offset. This is precisely the calculation a quality director or risk manager should be at the table for, not just finance: it is a decision about what level of care the community keeps access to, evaluated alongside what it pays for.

Conversion is not necessarily permanent. Facilities that convert to REH status can transition back to their original CAH or acute-care hospital designation, though CAHs that received their designation before January 1, 2006 under a state “necessary provider” determination may face additional obstacles reclaiming CAH status unless they independently satisfy the applicable location and regulatory requirements.

Quality and Patient-Safety Reporting Obligations

REHs report under the REH Quality Reporting (REHQR) Program, which draws its measure set from selected Hospital Outpatient Quality Reporting (OQR) Program measures rather than a separate REH-specific measure set. As of this writing, REHQR does not carry an associated payment adjustment the way Hospital IQR does for acute-care hospitals — but a quality director should treat that as the current state of the rule, not a permanent feature, and build reporting infrastructure as though a payment consequence could attach later. REHs also remain subject to routine survey by their accrediting organization or state survey agency under the REH Conditions of Participation, following the same deemed-status logic as any other Medicare-participating provider.

Frequently Asked Questions

Can a Rural Emergency Hospital have inpatient beds?

No, with one exception: a distinct part unit separately licensed as a skilled nursing facility. An REH cannot maintain acute inpatient beds or a swing-bed arrangement, since swing beds depend on the facility holding inpatient status.

What is the REH 24-hour length-of-stay rule, exactly?

REHs must keep an annual average length of stay of 24 hours or less per patient, measured from registration to discharge. It is an annual average, not a per-patient hard limit, but sustained boarding or delayed transfers can push the average out of compliance over time.

Which hospitals are eligible to convert to REH status?

Critical Access Hospitals, and rural acute-care, tribally-operated, or Indian Health Service hospitals with 50 or fewer beds that were open on December 27, 2020 (or that closed after that date but otherwise qualified).

How much is the REH monthly facility payment?

$285,625.90 per month in 2025, on top of OPPS-plus-5% payment for outpatient services, with the monthly amount adjusted annually by the hospital market basket percentage.

Does REHQR carry a payment penalty like Hospital IQR does?

Not currently. REHQR draws measures from the Hospital OQR Program but, as of this writing, has no associated payment adjustment for non-reporting.

Can a hospital convert back to CAH status after becoming an REH?

Generally yes. The main complication is for CAHs that received their original designation before January 1, 2006 under a state “necessary provider” determination, which may need to independently satisfy current location and regulatory requirements to reclaim CAH status.

For the broader Conditions of Participation framework an REH’s accreditation and survey obligations sit inside, see CMS Conditions of Participation for Hospitals: The Subpart Map. For the emergency-department screening and transfer duties that continue to apply regardless of inpatient-bed status, see EMTALA: Screening, Stabilization, and Transfer Rules. For the survey process itself, see Joint Commission Tracer Methodology and National Patient Safety Goals. For emergency-preparedness and incident-command obligations relevant to a small rural facility with limited surge capacity, see Hospital Incident Command System (HICS).