A patient with a COPD exacerbation or a moderate case of pneumonia used to have exactly one option for inpatient-level treatment: a hospital bed. In late 2020, that changed for a growing number of Medicare patients. Under a new federal waiver, some of those same patients started receiving IV antibiotics, twice-daily clinician visits, and continuous vital-sign monitoring — in their own bedrooms.

That model is called hospital at home, and it has moved from a small set of academic pilot programs into a nationally recognized care pathway faster than almost any other digital health initiative in recent memory. The catalyst was the COVID-19 pandemic, which strained inpatient bed capacity and pushed the Centers for Medicare & Medicaid Services (CMS) to formally recognize a model that health systems like Johns Hopkins and Brigham and Women’s Hospital had been quietly testing for more than two decades.

This article lays out what hospital at home actually is, the federal waiver that made it billable at hospital rates, the technology stack that makes it clinically safe, and the evidence base and open questions that will determine whether it becomes a permanent fixture of American acute care.

What “Hospital at Home” Actually Means

Hospital at home (sometimes written “Hospital-at-Home” or abbreviated HaH) is not simply home health care or a step-down recovery program. It is a substitution model: patients who meet specific clinical criteria and who would otherwise be admitted to an inpatient hospital bed are instead treated in their residence at a comparable intensity of care.

A typical hospital-at-home episode includes:

  • Daily or twice-daily in-person visits from a physician, nurse practitioner, or paramedic
  • Continuous or near-continuous remote monitoring of vital signs
  • IV medications, fluids, and in some programs oxygen therapy administered at home
  • Point-of-care diagnostics — portable X-ray, ultrasound, and lab draws — brought to the patient
  • 24/7 access to a clinical team by phone or video for escalation
  • A defined protocol for immediate transport back to a brick-and-mortar hospital if the patient deteriorates

The concept traces back to a Johns Hopkins model first described in the late 1990s by Dr. Bruce Leff and colleagues, which showed that select older adults with conditions like heart failure, COPD, and community-acquired pneumonia could be safely treated at home with equivalent or better outcomes than inpatient care. For years, the model remained a research curiosity in the United States, limited by fee-for-service payment rules that only reimbursed acute care delivered within a licensed hospital building.

The CMS Waiver That Changed the Payment Equation

The core barrier to scaling hospital at home was never clinical feasibility — it was reimbursement. Medicare’s Conditions of Participation require, among other things, that hospital nursing services be available on the premises 24 hours a day. That requirement effectively made it impossible to bill a home-based acute episode at the hospital inpatient rate.

CMS removed that barrier on November 25, 2020, when it announced the Acute Hospital Care at Home program. Using emergency waiver authority under Section 1135 of the Social Security Act — the same authority CMS had already used earlier in 2020 for its broader “Hospital Without Walls” initiative — CMS granted waivers of the specific Conditions of Participation at 42 CFR §482.23(b) and §482.23(b)(1), which otherwise require on-site, round-the-clock nursing coverage and immediate availability of a registered nurse.

To participate, a hospital must apply to CMS and attest that it can meet a defined set of safety standards, including:

  • Screening protocols to confirm a patient is clinically appropriate for home-based acute care
  • A physician or advanced practice provider evaluating the patient in person once daily
  • A registered nurse evaluating the patient in person, either in person or via continuous audio/video, at least twice daily
  • The ability to receive a minimum of two in-person visits daily from either nursing or paramedicine staff
  • A documented, immediate escalation pathway to transport the patient back to the hospital
  • Infection control, safety, and patient-consent protocols specific to the home setting

CMS published a list of approved participating hospitals and health systems that grew quickly through the winter of 2020–2021. By late January 2021, roughly 92 hospitals across 38 health systems in 24 states had been approved; by early April 2021, that had grown to 53 health systems and 116 hospitals in 29 states. The pace of enrollment made hospital at home one of the fastest-scaling reimbursement changes in Medicare’s recent history — though it remains tied to the COVID-19 public health emergency declaration, and its status once that emergency ends is an open policy question.

Importantly, the waiver applies only to Medicare fee-for-service inpatient billing. Commercial payers and Medicare Advantage plans have separately negotiated coverage in some markets, but there is no uniform national payment policy for hospital at home outside the CMS waiver structure.

The Technology Stack Behind the Model

Delivering inpatient-level acuity outside a hospital building is a logistics and monitoring problem as much as a clinical one. Health systems that have scaled hospital-at-home programs generally rely on four interlocking technology layers.

Remote patient monitoring and wearables

Patients are typically equipped with a kit of connected devices — a pulse oximeter, blood pressure cuff, thermometer, and often a continuous single-lead ECG patch or multi-parameter biosensor worn on the chest or arm. These devices stream vital signs to a monitoring dashboard, either continuously or at scheduled intervals, so clinical staff can track trends rather than relying solely on point-in-time in-person checks. Some programs supplement this with fall-detection sensors or pulse-rate variability monitoring for early detection of deterioration.

Connectivity and data transmission

Because monitoring data needs to reach a command center in near real time, most programs provide patients with a cellular-connected hub or tablet rather than relying on the patient’s home Wi-Fi. This is a deliberate design choice: cellular gateways reduce the risk that a patient’s own internet service — which may be unreliable, shared, or entirely absent — becomes a point of clinical failure. Connectivity gaps remain one of the most cited operational risks of the model, particularly for rural and lower-income patients.

Telehealth and virtual command centers

A staffed clinical command center — typically physicians and nurses working in shifts — reviews incoming monitoring data and conducts video visits with patients. Brigham and Women’s Hospital’s Home Hospital program and similar efforts have paired command-center monitoring with early-warning algorithms designed to flag physiological deterioration before it becomes a crisis, aiming to reduce both missed decompensation and unnecessary alarm fatigue among clinical staff. Video visits supplement, but do not replace, the required in-person nurse and physician visits.

Field logistics

None of the monitoring technology matters if the physical logistics fail. Hospital-at-home programs depend on a supporting operational layer to deliver and pick up durable medical equipment, run mobile phlebotomy and point-of-care lab testing, dispatch portable imaging (X-ray and ultrasound units designed for home use), and schedule paramedic or nursing visits on tight windows. Several programs contract with third-party logistics and home-health partners to handle this layer rather than building it in-house, since it draws on a different operational skill set than clinical care delivery.

What the Evidence Shows So Far

Hospital at home has a longer research track record than most digital health interventions, largely because of the pre-pandemic Johns Hopkins and Brigham programs.

The original Johns Hopkins model, evaluated in early studies of appropriately screened older adults, found that home-based acute care cost roughly a third less than comparable inpatient stays, produced shorter mean length of stay, and was associated with a markedly lower incidence of delirium during the episode of care — a common and serious complication of hospitalization in older adults. Patient and family satisfaction scores were also higher than for matched inpatients.

More recent controlled research out of Brigham and Women’s Hospital, led by Dr. David Levine, reinforced those findings in a randomized trial of adults presenting to the emergency department with conditions such as infection or exacerbations of heart failure, COPD, or asthma. That trial found substantially lower direct costs for the home-hospital group, along with reduced healthcare utilization and improved physical activity during recovery, without an increase in adverse safety events.

Taken together, the pre-2021 evidence base points toward three consistent findings across multiple programs and patient populations:

  1. Cost: Direct costs of care are consistently lower at home, largely driven by reduced use of ancillary testing and shorter effective length of stay.
  2. Safety and complications: Complication rates, including delirium, appear lower or comparable to inpatient care in properly screened patients — though screening criteria matter enormously and are not standardized across programs.
  3. Experience: Patient and caregiver satisfaction scores tend to run higher than for matched inpatient stays.

These results should be read with appropriate caution. Most of the strongest studies come from a small number of academic medical centers with mature programs, experienced staff, and carefully selected patient populations — typically excluding patients who are hemodynamically unstable, require ICU-level care, live alone without a willing caregiver, or lack safe, stable housing. Whether outcomes hold up as the model scales rapidly across hundreds of hospitals with varying levels of experience, under the pressure of the CMS waiver’s approval timeline, is a live question that the field has not yet fully answered.

Barriers to Scaling the Model

Even with a reimbursement pathway in place, hospital at home faces real operational and equity constraints.

Patient selection and equity. Programs generally require a stable home environment, a willing caregiver or the ability to live safely alone, and adequate connectivity. That combination of requirements risks systematically excluding lower-income patients, those experiencing housing instability, and patients without reliable broadband or cellular coverage — the same populations who often stand to benefit most from reduced hospital exposure.

Connectivity and digital infrastructure. Even with cellular-connected devices, rural and underserved areas can have inconsistent coverage, and clinical monitoring systems are less forgiving of dropped connections than a typical consumer application. A missed vital-sign reading in this context is a patient-safety issue, not a minor inconvenience.

Caregiver burden. Family members frequently take on informal caregiving duties — managing equipment, assisting with mobility, and monitoring for warning signs — that are typically handled by hospital staff. Programs vary widely in how much training and respite support they provide, and caregiver strain is an under-measured outcome in much of the existing research.

Workforce and logistics complexity. Running a command center, coordinating mobile nursing and paramedicine visits, and managing durable medical equipment delivery on tight timelines requires operational infrastructure that many hospitals — particularly smaller and rural facilities — do not currently have and may not be able to build quickly.

Interoperability and data security. Streaming continuous monitoring data from home devices into hospital electronic health records, while maintaining HIPAA-compliant transmission and storage, adds a layer of technical and security complexity that is more demanding than typical outpatient remote monitoring.

Policy uncertainty. The Acute Hospital Care at Home waiver is tied to the COVID-19 public health emergency and Section 1135 authority. Health systems investing in command centers, monitoring platforms, and staffing models are doing so without long-term certainty that the current payment structure will continue once the emergency declaration ends.

What to Watch Next

Hospital at home sits at an unusual intersection for digital health: a decades-old clinical model, a pandemic-driven regulatory opening, and a rapidly maturing remote monitoring technology stack all converging at once. The near-term questions worth tracking are whether CMS or Congress extends the waiver authority beyond the public health emergency, whether commercial and Medicare Advantage payers build durable coverage policies independent of the federal waiver, and whether outcomes data holds up as the model scales beyond the academic medical centers that pioneered it.

For hospital IT and digital health leaders, the practical work is already underway: evaluating remote monitoring and command-center platforms, building the logistics partnerships needed for mobile diagnostics and equipment delivery, and defining patient-selection criteria that balance safety with equitable access.

Frequently Asked Questions

What is the CMS Acute Hospital Care at Home waiver?

It is a program CMS launched on November 25, 2020, using Section 1135 emergency waiver authority to suspend specific Medicare Conditions of Participation around on-site nursing coverage. This allows approved hospitals to bill Medicare at inpatient rates for eligible acute-care episodes delivered in a patient’s home.

Which patients are eligible for hospital-at-home care?

Eligibility varies by hospital program, but generally requires a diagnosis suitable for home management (such as infections, heart failure, or COPD exacerbations), clinical stability, a safe home environment, and either a willing caregiver or the ability to manage safely alone. Programs typically exclude patients needing ICU-level or hemodynamically unstable care.

What technology do hospital-at-home programs use?

Most programs combine wearable or handheld remote monitoring devices (pulse oximetry, blood pressure, ECG), a cellular-connected hub or tablet for data transmission, a staffed virtual command center for monitoring and telehealth visits, and a logistics layer for mobile nursing, paramedicine, diagnostics, and equipment delivery.

Is hospital-at-home care as safe as being in a hospital?

Published research from established programs, including studies from Johns Hopkins and Brigham and Women’s Hospital, has generally found comparable or lower complication rates — including lower rates of hospital-acquired delirium — for carefully screened patients. These findings come primarily from mature academic programs, so results may vary as the model scales more broadly.

How many hospitals were approved for the program as of mid-2021?

CMS approval expanded quickly after the November 2020 launch. By late January 2021, about 92 hospitals across 38 health systems in 24 states had been approved; by early April 2021, that number had grown to 116 hospitals across 53 health systems in 29 states.

This article is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare provider for guidance specific to any medical condition or treatment decision.