Testing the Addition of the Immunotherapy Drug, Pembrolizumab, to the Usual Radiation Treatment for Newly Diagnosed Early Stage High Intermediate Risk Endometrial Cancer

Mount Sinai Chelsea, New York

Laura and Isaac Perlmutter Cancer Center at NYU Langone, New York

Mount Sinai West, New York

Mount Sinai Hospital, New York

Memorial Sloan Kettering Cancer Center, New York

NYP/Weill Cornell Medical Center, New York

Memorial Sloan Kettering Westchester, Harrison

Long Island Jewish Medical Center, New Hyde Park

Northwell Health/Center for Advanced Medicine, Lake Success

New York-Presbyterian/Brooklyn Methodist Hospital, Brooklyn

The New York Hospital Medical Center of Queens, Flushing

NYU Langone Hospital - Long Island, Mineola

Memorial Sloan Kettering Nassau, Uniondale

Memorial Sloan Kettering Commack, Commack

Stony Brook University Medical Center, Stony Brook

Women's Cancer Care Associates LLC, Albany

Highland Hospital, Rochester

University of Rochester, Rochester

UPMC-Magee Womens Hospital, Pittsburgh

UPMC Cancer Centers - Arnold Palmer Pavilion, Greensburg

Carlisle Regional Cancer Center, Carlisle

Sechler Family Cancer Center, Lebanon

UPMC Hillman Cancer Center at Rocco And Nancy Ortenzio Cancer Pavilion, Mechanicsburg

UPMC Pinnacle Cancer Center/Community Osteopathic Campus, Harrisburg

Adams Cancer Center, Gettysburg

WellSpan Health-York Cancer Center, York

WellSpan Health-York Hospital, York

Ephrata Cancer Center, Ephrata

Lancaster General Ann B Barshinger Cancer Institute, Lancaster

Lancaster General Hospital, Lancaster

Asplundh Cancer Pavilion, Willow Grove

Lankenau Medical Center, Wynnewood

University of Pennsylvania/Abramson Cancer Center, Philadelphia

Pennsylvania Hospital, Philadelphia

Thomas Jefferson University Hospital, Philadelphia

Paoli Memorial Hospital, Paoli

Chester County Hospital, West Chester

Sinai Hospital of Baltimore, Baltimore

VCU Massey Cancer Center at Stony Point, Richmond

VCU Massey Comprehensive Cancer Center, Richmond

Carilion Roanoke Memorial Hospital, Roanoke

West Virginia University Charleston Division, Charleston

Cone Health Cancer Center, Greensboro

UNC Lineberger Comprehensive Cancer Center, Chapel Hill

Duke Women's Cancer Care Raleigh, Raleigh

Duke Cancer Center Raleigh, Raleigh

Duke University Medical Center, Durham

Saint Francis Hospital, Greenville

Prisma Health Cancer Institute - Faris, Greenville

Saint Francis Cancer Center, Greenville

Saint Joseph's/Candler - Bluffton Campus, Bluffton

Northside Hospital-Forsyth, Cumming

Wellstar Kennestone Hospital, Marietta

CTCA at Southeastern Regional Medical Center, Newnan

Northside Hospital, Atlanta

Memorial Health University Medical Center, Savannah

Lewis Cancer and Research Pavilion at Saint Joseph's/Candler, Savannah

GenesisCare USA - FGO, Fort Myers

Regional Cancer Center-Lee Memorial Health System, Fort Myers

University of Alabama at Birmingham Cancer Center, Birmingham

Baptist Health Louisville, Louisville

Baptist Health Lexington, Lexington

Saint Elizabeth Healthcare Edgewood, Edgewood

Dublin Methodist Hospital, Dublin

Mount Carmel New Albany Surgical Hospital, New Albany

Saint Ann's Hospital, Westerville

Mount Carmel Grove City Hospital, Grove City

Ohio State University Comprehensive Cancer Center, Columbus

Mount Carmel East Hospital, Columbus

Riverside Methodist Hospital, Columbus

The Mark H Zangmeister Center, Columbus

Mount Carmel Health Center West, Columbus

Genesis Healthcare System Cancer Care Center, Zanesville

Geauga Hospital, Chardon

UH Seidman Cancer Center at Lake Health Mentor Campus, Mentor

Case Western Reserve University, Cleveland

MetroHealth Medical Center, Cleveland

Cleveland Clinic Cancer Center/Fairview Hospital, Cleveland

UHHS-Chagrin Highlands Medical Center, Beachwood

Hillcrest Hospital Cancer Center, Mayfield Heights

UH Seidman Cancer Center at Saint John Medical Center, Westlake

UHHS-Westlake Medical Center, Westlake

Cleveland Clinic Foundation, Cleveland

University Hospitals Sharon Health Center, Wadsworth

Aultman Health Foundation, Canton

Dayton Physicians LLC-Atrium, Franklin

Good Samaritan Hospital - Cincinnati, Cincinnati

Bethesda North Hospital, Cincinnati

Dayton Physician LLC - Englewood, Dayton

Miami Valley Hospital North, Dayton

Dayton Physicians LLC-Miami Valley South, Centerville

Miami Valley Hospital South, Centerville

Ascension Saint Vincent Indianapolis Hospital, Indianapolis

Corewell Health William Beaumont University Hospital, Royal Oak

Corewell Health Beaumont Troy Hospital, Troy

Corewell Health Dearborn Hospital, Dearborn

Wayne State University/Karmanos Cancer Institute, Detroit

Weisberg Cancer Treatment Center, Farmington Hills

Mary Greeley Medical Center, Ames

McFarland Clinic - Ames, Ames

University of Iowa/Holden Comprehensive Cancer Center, Iowa City

Ascension Southeast Wisconsin Hospital - Elmbrook Campus, Brookfield

Ascension Columbia Saint Mary's Hospital Ozaukee, Mequon

Ascension Saint Francis - Reiman Cancer Center, Franklin

Ascension Southeast Wisconsin Hospital - Franklin, Franklin

Ascension Southeast Wisconsin Hospital - Saint Joseph Campus, Milwaukee

Ascension Columbia Saint Mary's Hospital - Milwaukee, Milwaukee

Ascension Saint Francis Hospital, Milwaukee

Medical College of Wisconsin, Milwaukee

Ascension Medical Group Southeast Wisconsin - Mayfair Road, Wauwatosa

Ascension All Saints Hospital, Racine

University of Wisconsin Carbone Cancer Center - University Hospital, Madison

Marshfield Medical Center-Marshfield, Marshfield

Marshfield Medical Center - Weston, Weston

Marshfield Medical Center-River Region at Stevens Point, Stevens Point

Marshfield Medical Center - Minocqua, Minocqua

Gundersen Lutheran Medical Center, La Crosse

Marshfield Medical Center-EC Cancer Center, Eau Claire

Marshfield Medical Center-Rice Lake, Rice Lake

United Hospital, Saint Paul

Minnesota Oncology Hematology PA-Maplewood, Maplewood

Minnesota Oncology Hematology PA-Woodbury, Woodbury

Minnesota Oncology - Burnsville, Burnsville

Monticello Cancer Center, Monticello

Ridgeview Medical Center, Waconia

Abbott-Northwestern Hospital, Minneapolis

Park Nicollet Clinic - Saint Louis Park, Saint Louis Park

Unity Hospital, Fridley

Mercy Hospital, Coon Rapids

Fairview Southdale Hospital, Edina

Rice Memorial Hospital, Willmar

Coborn Cancer Center at Saint Cloud Hospital, Saint Cloud

Sanford Cancer Center Oncology Clinic, Sioux Falls

Avera Cancer Institute, Sioux Falls

Rapid City Regional Hospital, Rapid City

Sanford Broadway Medical Center, Fargo

Sanford Roger Maris Cancer Center, Fargo

Sanford Bismarck Medical Center, Bismarck

Billings Clinic Cancer Center, Billings

Bozeman Health Deaconess Hospital, Bozeman

Community Medical Center, Missoula

NorthShore University HealthSystem-Glenbrook Hospital, Glenview

NorthShore University HealthSystem-Highland Park Hospital, Highland Park

Northwestern Medicine Lake Forest Hospital, Lake Forest

Midwestern Regional Medical Center, Zion

Northwestern Medicine Cancer Center Delnor, Geneva

Loyola University Medical Center, Maywood

NorthShore University HealthSystem-Evanston Hospital, Evanston

UC Comprehensive Cancer Center at Silver Cross, New Lenox

University of Chicago Medicine-Orland Park, Orland Park

Northwestern Medicine Cancer Center Warrenville, Warrenville

Northwestern University, Chicago

Rush MD Anderson Cancer Center, Chicago

University of Chicago Comprehensive Cancer Center, Chicago

Cancer Care Center of O'Fallon, O'Fallon

Crossroads Cancer Center, Effingham

Cancer Care Specialists of Illinois - Decatur, Decatur

Decatur Memorial Hospital, Decatur

Southern Illinois University School of Medicine, Springfield

Springfield Clinic, Springfield

Springfield Memorial Hospital, Springfield

Centralia Oncology Clinic, Centralia

Missouri Baptist Sullivan Hospital, Sullivan

Washington University School of Medicine, St Louis

BJC Outpatient Center at Sunset Hills, Sunset Hills

Mercy Hospital South, St Louis

Missouri Baptist Medical Center, St Louis

Mercy Hospital Saint Louis, St Louis

Parkland Health Center - Farmington, Farmington

Sainte Genevieve County Memorial Hospital, Sainte Genevieve

Mercy Hospital Springfield, Springfield

CoxHealth South Hospital, Springfield

Nebraska Cancer Specialists/Oncology Hematology West PC - MECC, Omaha

Nebraska Methodist Hospital, Omaha

Oncology Associates PC, Omaha

Alegent Health Bergan Mercy Medical Center, Omaha

East Jefferson General Hospital, Metairie

Louisiana State University Health Science Center, New Orleans

University Medical Center New Orleans, New Orleans

University of Oklahoma Health Sciences Center, Oklahoma City

Mercy Hospital Oklahoma City, Oklahoma City

Parkland Memorial Hospital, Dallas

UT Southwestern/Simmons Cancer Center-Dallas, Dallas

Baylor College of Medicine/Dan L Duncan Comprehensive Cancer Center, Houston

Ben Taub General Hospital, Houston

Houston Methodist Hospital, Houston

M D Anderson Cancer Center, Houston

Methodist Willowbrook Hospital, Houston

MD Anderson West Houston, Houston

Houston Methodist West Hospital, Houston

MD Anderson in The Woodlands, Conroe

Houston Methodist The Woodlands Hospital, The Woodlands

MD Anderson in Sugar Land, Sugar Land

Houston Methodist Sugar Land Hospital, Sugar Land

MD Anderson League City, League City

UCHealth University of Colorado Hospital, Aurora

AdventHealth Littleton, Littleton

UCHealth Highlands Ranch Hospital, Highlands Ranch

AdventHealth Parker, Parker

AdventHealth Porter, Denver

Rocky Mountain Cancer Centers-Penrose, Colorado Springs

UCHealth Memorial Hospital Central, Colorado Springs

Memorial Hospital North, Colorado Springs

Saint Luke's Cancer Institute - Twin Falls, Twin Falls

Saint Luke's Cancer Institute - Fruitland, Fruitland

Saint Luke's Cancer Institute - Meridian, Meridian

Saint Luke's Cancer Institute - Nampa, Nampa

Saint Luke's Cancer Institute - Boise, Boise

Farmington Health Center, Farmington

University of Utah Sugarhouse Health Center, Salt Lake City

Huntsman Cancer Institute/University of Utah, Salt Lake City

University of New Mexico Cancer Center, Albuquerque

Women's Cancer Center of Nevada, Las Vegas

Los Angeles General Medical Center, Los Angeles

USC / Norris Comprehensive Cancer Center, Los Angeles

UCLA / Jonsson Comprehensive Cancer Center, Los Angeles

UC San Diego Moores Cancer Center, La Jolla

Community Cancer Institute, Clovis

University Oncology Associates, Clovis

UCSF Medical Center-Mission Bay, San Francisco

John Muir Medical Center-Concord, Concord

John Muir Medical Center-Walnut Creek, Walnut Creek

Hawaii Cancer Care - Westridge, ‘Aiea

Pali Momi Medical Center, ‘Aiea

Wilcox Memorial Hospital and Kauai Medical Clinic, Lihue

Hawaii Cancer Care Inc - Waterfront Plaza, Honolulu

Queen's Cancer Cenrer - POB I, Honolulu

Queen's Medical Center, Honolulu

Straub Clinic and Hospital, Honolulu

University of Hawaii Cancer Center, Honolulu

Hawaii Cancer Care Inc-Liliha, Honolulu

Queen's Cancer Center - Kuakini, Honolulu

The Cancer Center of Hawaii-Liliha, Honolulu

Kapiolani Medical Center for Women and Children, Honolulu

Clackamas Radiation Oncology Center, Clackamas

Providence Cancer Institute Clackamas Clinic, Clackamas

Legacy Mount Hood Medical Center, Gresham

Legacy Meridian Park Hospital, Tualatin

Providence Newberg Medical Center, Newberg

Legacy Good Samaritan Hospital and Medical Center, Portland

Providence Portland Medical Center, Portland

Providence Saint Vincent Medical Center, Portland

Legacy Salmon Creek Hospital, Vancouver

Danbury Hospital, Danbury

Smilow Cancer Hospital-Derby Care Center, Derby

Smilow Cancer Hospital Care Center-Fairfield, Fairfield

Smilow Cancer Hospital Care Center at Glastonbury, Glastonbury

Smilow Cancer Hospital Care Center at Greenwich, Greenwich

Smilow Cancer Hospital Care Center - Guilford, Guilford

Smilow Cancer Hospital Care Center at Saint Francis, Hartford

Smilow Cancer Center/Yale-New Haven Hospital, New Haven

Yale University, New Haven

Yale-New Haven Hospital North Haven Medical Center, North Haven

Norwalk Hospital, Norwalk

Smilow Cancer Hospital-Orange Care Center, Orange

Smilow Cancer Hospital-Torrington Care Center, Torrington

Smilow Cancer Hospital Care Center-Trumbull, Trumbull

Smilow Cancer Hospital-Waterbury Care Center, Waterbury

Smilow Cancer Hospital Care Center - Waterford, Waterford

MaineHealth Coastal Cancer Treatment Center, Bath

MaineHealth Maine Medical Center - Biddeford, Biddeford

MaineHealth Maine Medical Center - Portland, Portland

MaineHealth Cancer Care and IV Therapy - Sanford, Sanford

MaineHealth Maine Medical Center- Scarborough, Scarborough

Memorial Sloan Kettering Basking Ridge, Basking Ridge

Cooper Hospital University Medical Center, Camden

Memorial Sloan Kettering Monmouth, Middletown

Memorial Sloan Kettering Bergen, Montvale

Virtua Samson Cancer Center, Moorestown

Jersey Shore Medical Center, Neptune City

Virtua Voorhees, Voorhees Township

Atrium Medical Center-Middletown Regional Hospital, Franklin

Women and Infants Hospital, Providence

Smilow Cancer Hospital Care Center - Westerly, Westerly

Sanford USD Medical Center - Sioux Falls, Sioux Falls

Cancer Center-Metro Medical Center Bayamon, Bayamón

Doctors Cancer Center, Manatí

San Juan Community Oncology Group, San Juan

Centro Comprensivo de Cancer de UPR, San Juan

San Juan City Hospital, San Juan