Testing the Addition of the Immunotherapy Drug Pembrolizumab to the Usual Chemotherapy Treatment (Paclitaxel and Carboplatin) in Stage III-IV or Recurrent Endometrial Cancer

Kure Medical Center and Chugoku Cancer Center, Kure

Mount Sinai Chelsea, New York

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

Mount Sinai Hospital, New York

NYP/Columbia University Medical Center/Herbert Irving Comprehensive Cancer Center, New York

Memorial Sloan Kettering Cancer Center, New York

NYP/Weill Cornell Medical Center, New York

Staten Island University Hospital, Staten Island

Montefiore Medical Center-Einstein Campus, The Bronx

Montefiore Medical Center - Moses Campus, The Bronx

Westchester Medical Center, Valhalla

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

Northwell Health Imbert Cancer Center, Bay Shore

Island Gynecologic Oncology, Brightwaters

Memorial Sloan Kettering Commack, Commack

Stony Brook University Medical Center, Stony Brook

State University of New York Upstate Medical University, Syracuse

Roswell Park Cancer Institute, Buffalo

Highland Hospital, Rochester

University of Rochester, Rochester

Jefferson Hospital, Jefferson Hills

Wexford Health and Wellness Pavilion, Wexford

Forbes Hospital, Monroeville

UPMC Hillman Cancer Center - Monroeville, Monroeville

UPMC-Magee Womens Hospital, Pittsburgh

West Penn Hospital, Pittsburgh

University of Pittsburgh Cancer Institute (UPCI), Pittsburgh

UPMC-Johnstown/John P. Murtha Regional Cancer Center, Johnstown

Sechler Family Cancer Center, Lebanon

Adams Cancer Center, Gettysburg

WellSpan Medical Oncology and Hematology, Hanover

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

Geisinger Medical Center, Danville

Geisinger Cancer Services-Pottsville, Pottsville

Lehigh Valley Hospital - Muhlenberg, Bethlehem

Lehigh Valley Hospital-Cedar Crest, Allentown

Geisinger Medical Center-Cancer Center Hazleton, Hazleton

Community Medical Center, Scranton

Geisinger Wyoming Valley/Henry Cancer Center, Wilkes-Barre

Asplundh Cancer Pavilion, Willow Grove

Thomas Jefferson University Hospital, Philadelphia

Reading Hospital, West Reading

Helen F Graham Cancer Center, Newark

MedStar Washington Hospital Center, Washington D.C.

Sibley Memorial Hospital, Washington D.C.

UM Upper Chesapeake Medical Center, Bel Air

University of Maryland/Greenebaum Cancer Center, Baltimore

Greater Baltimore Medical Center, Baltimore

Sinai Hospital of Baltimore, Baltimore

Saint Agnes Hospital, Baltimore

MedStar Franklin Square Medical Center/Weinberg Cancer Institute, Baltimore

Johns Hopkins University/Sidney Kimmel Cancer Center, Baltimore

Luminis Health Anne Arundel Medical Center, Annapolis

University of Maryland Shore Medical Center at Easton, Easton

University of Virginia Cancer Center, Charlottesville

VCU Massey Comprehensive Cancer Center, Richmond

West Virginia University Charleston Division, Charleston

Monongalia Hospital, Morgantown

West Virginia University Healthcare, Morgantown

Wake Forest University Health Sciences, Winston-Salem

Southeastern Medical Oncology Center-Goldsboro, Goldsboro

UNC Lineberger Comprehensive Cancer Center, Chapel Hill

Atrium Health Cabarrus/LCI-Concord, Concord

Carolinas Medical Center/Levine Cancer Institute, Charlotte

Southeastern Medical Oncology Center-Clinton, Clinton

Novant Health New Hanover Regional Medical Center, Wilmington

Southeastern Medical Oncology Center-Jacksonville, Jacksonville

Margaret R Pardee Memorial Hospital, Hendersonville

Medical University of South Carolina, Charleston

Saint Francis Hospital, Greenville

Prisma Health Cancer Institute - Faris, Greenville

Saint Francis Cancer Center, Greenville

Prisma Health Cancer Institute - Seneca, Seneca

WellStar Health System Inc, Marietta

Wellstar Kennestone Hospital, Marietta

WellStar North Fulton Hospital, Roswell

WellStar Vinings Health Park, Smyrna

WellStar Cobb Hospital, Austell

Piedmont Fayette Hospital, Fayetteville

CTCA at Southeastern Regional Medical Center, Newnan

Grady Health System, Atlanta

Emory University Hospital Midtown, Atlanta

Emory University Hospital/Winship Cancer Institute, Atlanta

Emory Saint Joseph's Hospital, Atlanta

Northside Hospital, Atlanta

Northeast Georgia Medical Center-Gainesville, Gainesville

Memorial Health University Medical Center, Savannah

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

Florida Cancer Specialists - Bradenton Cancer Center, Bradenton

Florida Cancer Specialists - Sarasota, Sarasota

Florida Cancer Specialists - Sarasota Downtown, Sarasota

Sarasota Memorial Hospital, Sarasota

Florida Cancer Specialists - Venice Pinebrook, Venice

Florida Cancer Specialists - Venice Island, Venice

University of Alabama at Birmingham Cancer Center, Birmingham

Vanderbilt University/Ingram Cancer Center, Nashville

Baptist Memorial Hospital and Cancer Center-Memphis, Memphis

Mississippi Baptist Medical Center, Jackson

University of Mississippi Medical Center, Jackson

Saint Elizabeth Healthcare Edgewood, Edgewood

Kyungpook National University Chilgok Hospital, Daegu

Keimyung University-Dongsan Medical Center, Dalseo-gu

Ohio State University Comprehensive Cancer Center, Columbus

Riverside Methodist Hospital, Columbus

The Mark H Zangmeister Center, Columbus

ProMedica Flower Hospital, Sylvania

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

Cleveland Clinic Foundation, Cleveland

Summa Health System - Akron Campus, Akron

Aultman Health Foundation, Canton

University of Cincinnati Cancer Center-West Chester, West Chester

University of Cincinnati Cancer Center-UC Medical Center, Cincinnati

Good Samaritan Hospital - Cincinnati, Cincinnati

Miami Valley Hospital South, Centerville

Franciscan Health Mooresville, Mooresville

Indiana University/Melvin and Bren Simon Cancer Center, Indianapolis

Community Cancer Center East, Indianapolis

Community Cancer Center South, Indianapolis

Franciscan Health Indianapolis, Indianapolis

Community Cancer Center North, Indianapolis

Ascension Saint Vincent Indianapolis Hospital, Indianapolis

Northwest Cancer Center - Main Campus, Crown Point

Northwest Oncology LLC, Dyer

Saint Catherine Hospital, Indianapolis

The Community Hospital, Munster

Women's Diagnostic Center - Munster, Munster

Northwest Cancer Center - Hobart, Hobart

Saint Mary Medical Center, Hobart

Northwest Cancer Center - Valparaiso, Valparaiso

Trinity Health Saint Joseph Mercy Hospital Ann Arbor, Ann Arbor

University of Michigan Comprehensive Cancer Center, Ann Arbor

Cancer Hematology Centers - Flint, Flint

Genesee Hematology Oncology PC, Flint

Genesys Hurley Cancer Institute, Flint

University of Michigan Health - Sparrow Lansing, Lansing

Bronson Methodist Hospital, Kalamazoo

West Michigan Cancer Center, Kalamazoo

Corewell Health Grand Rapids Hospitals - Butterworth Hospital, Grand Rapids

Munson Medical Center, Traverse City

Samsung Changwon Hospital, Seoul

University of Iowa/Holden Comprehensive Cancer Center, Iowa City

Aurora Health Care Germantown Health Center, Germantown

Aurora Cancer Care-Grafton, Grafton

ProHealth Oconomowoc Memorial Hospital, Oconomowoc

Aurora Medical Center in Summit, Summit

Vince Lombardi Cancer Clinic-Sheboygan, Sheboygan

Aurora Cancer Care-Southern Lakes VLCC, Burlington

Aurora Cancer Care-Kenosha South, Kenosha

UW Cancer Center at ProHealth Care, Waukesha

Aurora Cancer Care-Milwaukee, Milwaukee

Aurora Saint Luke's Medical Center, Milwaukee

Aurora Cancer Care-Milwaukee West, Wauwatosa

Aurora West Allis Medical Center, West Allis

Aurora Sinai Medical Center, Milwaukee

Aurora Cancer Care-Racine, Racine

University of Wisconsin Carbone Cancer Center - University Hospital, Madison

Aurora Bay Area Medical Group-Marinette, Marinette

Vince Lombardi Cancer Clinic-Two Rivers, Two Rivers

Aurora BayCare Medical Center, Green Bay

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

Marshfield Medical Center-EC Cancer Center, Eau Claire

Marshfield Medical Center-Rice Lake, Rice Lake

Vince Lombardi Cancer Clinic - Oshkosh, Oshkosh

Essentia Health Cancer Center, Duluth

Mayo Clinic in Rochester, Rochester

Sanford Joe Lueken Cancer Center, Bemidji

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

Community Hospital of Anaconda, Anaconda

NorthShore University HealthSystem-Glenbrook Hospital, Glenview

NorthShore University HealthSystem-Highland Park Hospital, Highland Park

Midwestern Regional Medical Center, Zion

Northwestern Medicine Cancer Center Delnor, Geneva

Loyola University Medical Center, Maywood

NorthShore University HealthSystem-Evanston Hospital, Evanston

Ingalls Memorial Hospital, Harvey

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 University Medical Center, Chicago

University of Illinois, Chicago

University of Chicago Comprehensive Cancer Center, Chicago

Carle Cancer Center, Urbana

Carle at The Riverfront, Danville

Carle Physician Group-Mattoon/Charleston, Mattoon

Cancer Care Center of O'Fallon, O'Fallon

Crossroads Cancer Center, Effingham

Cancer Care Specialists of Illinois - Decatur, Decatur

Springfield Clinic, Springfield

Washington University School of Medicine, St Louis

Mercy Hospital Saint Louis, St Louis

Saint Luke's Hospital of Kansas City, Kansas City

Mercy Hospital Springfield, Springfield

University of Kansas Cancer Center, Kansas City

University of Kansas Clinical Research Center, Fairway

University of Kansas Hospital-Westwood Cancer Center, Westwood

University of Kansas Hospital-Indian Creek Campus, Overland Park

Nebraska Methodist Hospital, Omaha

University of Nebraska Medical Center, Omaha

Nebraska Cancer Specialists/Oncology Hematology West PC, Grand Island

East Jefferson General Hospital, Metairie

University Medical Center New Orleans, New Orleans

Ochsner Baptist Medical Center, New Orleans

Ochsner Medical Center Jefferson, New Orleans

LSU Health Baton Rouge-North Clinic, Baton Rouge

Our Lady of the Lake Physician Group, Baton Rouge

Our Lady of The Lake, Baton Rouge

Our Lady of the Lake Medical Oncology, Baton Rouge

Woman's Hospital, Baton Rouge

University of Arkansas for Medical Sciences, Little Rock

NEA Baptist Memorial Hospital and Fowler Family Cancer Center - Jonesboro, Jonesboro

University of Oklahoma Health Sciences Center, Oklahoma City

Oklahoma Cancer Specialists and Research Institute-Tulsa, Tulsa

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

Methodist Willowbrook Hospital, Houston

Houston Methodist The Woodlands Hospital, The Woodlands

Houston Methodist Sugar Land Hospital, Sugar Land

Poudre Valley Hospital, Fort Collins

Cancer Care and Hematology-Fort Collins, Fort Collins

Medical Center of the Rockies, Loveland

Banner McKee Medical Center, Loveland

Banner North Colorado Medical Center, Greeley

UCHealth Greeley Hospital, Greeley

Penrose-Saint Francis Healthcare, Colorado Springs

UCHealth Memorial Hospital Central, Colorado Springs

Memorial Hospital North, Colorado Springs

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

Saint Alphonsus Cancer Care Center-Caldwell, Caldwell

Saint Luke's Cancer Institute - Fruitland, Fruitland

Saint Luke's Cancer Institute - Meridian, Meridian

Saint Alphonsus Cancer Care Center-Nampa, Nampa

Saint Luke's Cancer Institute - Nampa, Nampa

Saint Alphonsus Cancer Care Center-Boise, Boise

Saint Luke's Cancer Institute - Boise, Boise

University of Utah Sugarhouse Health Center, Salt Lake City

Huntsman Cancer Institute/University of Utah, Salt Lake City

CTCA at Western Regional Medical Center, Goodyear

Southwest Gynecologic Oncology Associates Inc, Albuquerque

University of New Mexico Cancer Center, Albuquerque

Kaiser Permanente Los Angeles Medical Center, Los Angeles

Los Angeles General Medical Center, Los Angeles

USC / Norris Comprehensive Cancer Center, Los Angeles

Cedars Sinai Medical Center, Los Angeles

UCLA / Jonsson Comprehensive Cancer Center, Los Angeles

Kaiser Permanente-Bellflower, Bellflower

Kaiser Permanente South Bay, Harbor City

City of Hope Comprehensive Cancer Center, Duarte

City of Hope South Pasadena, South Pasadena

Kaiser Permanente-Baldwin Park, Baldwin Park

City of Hope Upland, Upland

Kaiser Permanente-San Marcos, San Marcos

UC San Diego Moores Cancer Center, La Jolla

Kaiser Permanente-San Diego Zion, San Diego

Naval Medical Center -San Diego, San Diego

Eisenhower Medical Center, Rancho Mirage

Kaiser Permanente-Riverside, Riverside

Kaiser Permanente-Irvine, Irvine

Saint Joseph Hospital - Orange, Orange

UC Irvine Health/Chao Family Comprehensive Cancer Center, Orange

City of Hope Antelope Valley, Lancaster

Community Cancer Institute, Clovis

Palo Alto Medical Foundation-Gynecologic Oncology, Mountain View

Kaiser Permanente-South San Francisco, South San Francisco

Palo Alto Medical Foundation-Sunnyvale, Sunnyvale

Zuckerberg San Francisco General Hospital, San Francisco

California Pacific Medical Center-Pacific Campus, San Francisco

Kaiser Permanente-San Francisco, San Francisco

UCSF Medical Center-Mission Bay, San Francisco

Kaiser Permanente San Leandro, San Leandro

Kaiser Permanente-Vallejo, Vallejo

Kaiser Permanente-Walnut Creek, Walnut Creek

John Muir Medical Center-Walnut Creek, Walnut Creek

Kaiser Permanente-Oakland, Oakland

Alta Bates Summit Medical Center-Herrick Campus, Berkeley

Kaiser Permanente Medical Center - Santa Clara, Santa Clara

Kaiser Permanente-Santa Teresa-San Jose, San Jose

Kaiser Permanente-Roseville, Roseville

Kaiser Permanente Downtown Commons, Sacramento

Mercy Cancer Center - Sacramento, Sacramento

University of California Davis Comprehensive Cancer Center, Sacramento

Mercy Regional Cancer Center, Redding

Mercy Oncology Center, Redding

Queen's Medical Center, Honolulu

Kapiolani Medical Center for Women and Children, Honolulu

Legacy Meridian Park Hospital, Tualatin

Legacy Good Samaritan Hospital and Medical Center, Portland

Providence Portland Medical Center, Portland

Providence Saint Vincent Medical Center, Portland

Saint Charles Health System, Bend

Saint Alphonsus Cancer Care Center-Ontario, Ontario

Valley Medical Center, Renton

Swedish Medical Center-First Hill, Seattle

MultiCare Gig Harbor Medical Park, Gig Harbor

MultiCare Good Samaritan Hospital, Puyallup

MultiCare Tacoma General Hospital, Tacoma

Legacy Salmon Creek Hospital, Vancouver

Kadlec Clinic Hematology and Oncology, Kennewick

Alaska Women's Cancer Care, Anchorage

Danbury Hospital, Danbury

Smilow Cancer Hospital Care Center - Guilford, Guilford

Hartford Hospital, Hartford

Smilow Cancer Hospital Care Center at Saint Francis, Hartford

The Hospital of Central Connecticut, New Britain

Yale University, New Haven

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

Norwalk Hospital, Norwalk

Stamford Hospital/Bennett Cancer Center, Stamford

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

Harold Alfond Center for Cancer Care, Augusta

MaineHealth Waldo Hospital, Belfast

MaineHealth Maine Medical Center - Biddeford, Biddeford

Lafayette Family Cancer Center-EMMC, Brewer

Penobscot Bay Medical Center, Rockport

MaineHealth Cancer Care and IV Therapy - Sanford, Sanford

MaineHealth Maine Medical Center- Scarborough, Scarborough

Walter Reed National Military Medical Center, Bethesda

Lahey Hospital and Medical Center, Burlington

Lowell General Hospital, Lowell

Baystate Medical Center, Springfield

Beth Israel Deaconess Medical Center/Winchester Center for Cancer Care, Winchester

UMass Memorial Medical Center - Memorial Division, Worcester

Dartmouth Hitchcock Medical Center/Dartmouth Cancer Center, Lebanon

Memorial Sloan Kettering Basking Ridge, Basking Ridge

Cooper Hospital University Medical Center, Camden

Monmouth Medical Center Southern Campus, Lakewood

Saint Barnabas Medical Center, Livingston

Monmouth Medical Center, Long Branch

Memorial Sloan Kettering Monmouth, Middletown

Memorial Sloan Kettering Bergen, Montvale

Jersey Shore Medical Center, Neptune City

Rutgers Cancer Institute of New Jersey, New Brunswick

The Valley Hospital - Luckow Pavilion, Paramus

Neurosurgeons of New Jersey-Ridgewood, Ridgewood

Valley Health System Ridgewood Campus, Ridgewood

Robert Wood Johnson University Hospital Somerset, Somerville

Community Medical Center, Toms River

MD Anderson Cancer Center at Cooper-Voorhees, Voorhees Township

Valley Medical Group - Wayne Multispecialty Practice, Wayne

Valley Health System-Hematology/Oncology, Westwood

Women and Infants Hospital, Providence

University of Vermont Medical Center, Burlington

The Moncton Hospital, Moncton

Royal Victoria Regional Health Centre, Barrie

Health Sciences North, Greater Sudbury

Juravinski Cancer Centre at Hamilton Health Sciences, Hamilton

Kingston Health Sciences Centre, Kingston

London Regional Cancer Program, London

Lakeridge Health Oshawa, Oshawa

Algoma District Cancer Program Sault Area Hospital, Sault Ste. Marie

Odette Cancer Centre- Sunnybrook Health Sciences Centre, Toronto

University Health Network-Princess Margaret Hospital, Toronto

Hopital de la Cite-de-la-Sante, Laval

CHUM - Centre Hospitalier de l'Universite de Montreal, Montreal

Allan Blair Cancer Centre, Regina

Saskatoon Cancer Centre, Saskatoon

Ehime University Hospital, Tōon

Niigata University Medical and Dental Hospital, Niigata

Saitama Medical University International Medical Center, Saitama

Centro Comprensivo de Cancer de UPR, San Juan

Seoul National University Bundang Hospital, Seongnam

Asan Medical Center, Seoul

Gangnam Severance Hospital, Seoul

Yonsei University Health System-Severance Hospital, Seoul

Korea Cancer Center Hospital, Seoul