Home Hospital for Suddenly Ill Adults

Inclusion Criteria: * Resides within either a 5-mile or 20 minute driving radius of emergency department * Has capacity to consent to study OR can assent to study and has proxy who can consent * \>= 18 years-old * Can identify a potential caregiver who agrees to stay with patient for first 24 hours of admission. Caregiver must be competent to call care team if a problem is evident to her/him. After 24 hours, this caregiver should be available for as-needed spot checks on the patient. This criterion may be waived for highly competent patients at the patient and clinician's discretion. * Primary or possible diagnosis of cellulitis, heart failure, complicated urinary tract infection, pneumonia, COPD/asthma, other infection, chronic kidney disease, malignant pain, diabetes and its complications, gout flare, hypertensive urgency, previously diagnosed atrial fibrillation with rapid ventricular response, anticoagulation needs, or a patient who desires only medical management that requires inpatient admission, as determined by the emergency room team. Exclusion Criteria: * Undomiciled * No working heat (October-April), no working air conditioning if forecast \> 80°F (June-September), or no running water * On methadone requiring daily pickup of medication * In police custody * Resides in facility that provides on-site medical care (e.g., skilled nursing facility) * Domestic violence screen positive * Acute delirium, as determined by the Confusion Assessment Method * Cannot establish peripheral access in emergency department (or access requires ultrasound guidance) * Secondary condition: end-stage renal disease, acute myocardial infarction, acute cerebral vascular accident, acute hemorrhage * Primary diagnosis requires multiple or routine administrations of intravenous narcotics for pain control * Cannot independently ambulate to bedside commode * As deemed by on-call medical doctor, patient likely to require any of the following procedures: computed tomography, magnetic resonance imaging, endoscopic procedure, blood transfusion, cardiac stress test, or surgery * High risk for clinical deterioration * Home hospital census is full (maximum 5 patients at any time)