ClinicalTrials.gov record
Active, not recruiting Phase 2 Interventional Results available

Testing the Addition of Radiation Therapy to Immunotherapy for Merkel Cell Carcinoma

ClinicalTrials.gov ID: NCT03304639

Public ClinicalTrials.gov record NCT03304639. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.

ClinicalTrials.gov public records Last synced May 8, 2026, 3:54 AM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Official title

A Randomized Phase II Study of Anti-PD1 Antibody [MK-3475 (Pembrolizumab)] Alone Versus Anti-PD1 Antibody Plus Stereotactic Body Radiation Therapy in Advanced Merkel Cell Carcinoma

Study identification

NCT ID
NCT03304639
Recruitment status
Active, not recruiting
Study type
Interventional
Phase
Phase 2
Lead sponsor
National Cancer Institute (NCI)
NIH
Enrollment
9 participants

Conditions and interventions

Eligibility (public fields only)

Age range
18 Years and older
Sex
All
Healthy volunteers
Healthy volunteers not accepted

This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.

Study timeline

Start date
Jun 11, 2018
Primary completion
Jun 6, 2022
Completion
Sep 18, 2026
Last update posted
Apr 12, 2026

2018 – 2026

United States locations

U.S. sites
255
U.S. states
36
U.S. cities
175
Facility City State ZIP Site status
Anchorage Associates in Radiation Medicine Anchorage Alaska 98508
Alaska Breast Care and Surgery LLC Anchorage Alaska 99508
Alaska Oncology and Hematology LLC Anchorage Alaska 99508
Alaska Women's Cancer Care Anchorage Alaska 99508
Anchorage Oncology Centre Anchorage Alaska 99508
Katmai Oncology Group Anchorage Alaska 99508
Providence Alaska Medical Center Anchorage Alaska 99508
Banner University Medical Center - Tucson Tucson Arizona 85719
University of Arizona Cancer Center-North Campus Tucson Arizona 85719
Mercy Hospital Fort Smith Fort Smith Arkansas 72903
CHI Saint Vincent Cancer Center Hot Springs Hot Springs Arkansas 71913
PCR Oncology Arroyo Grande California 93420
Providence Saint Joseph Medical Center/Disney Family Cancer Center Burbank California 91505
Penrose-Saint Francis Healthcare Colorado Springs Colorado 80907
Rocky Mountain Cancer Centers-Penrose Colorado Springs Colorado 80907
AdventHealth Porter Denver Colorado 80210
Saint Anthony Hospital Lakewood Colorado 80228
AdventHealth Littleton Littleton Colorado 80122
Longmont United Hospital Longmont Colorado 80501
AdventHealth Parker Parker Colorado 80138
Saint Mary Corwin Medical Center Pueblo Colorado 81004
Rocky Mountain Cancer Centers-Thornton Thornton Colorado 80260
Smilow Cancer Center/Yale-New Haven Hospital New Haven Connecticut 06510
Yale University New Haven Connecticut 06520
Mount Sinai Comprehensive Cancer Center at Aventura Aventura Florida 33180
Holy Cross Hospital Fort Lauderdale Florida 33308
Mount Sinai Medical Center Miami Beach Florida 33140
Lewis Cancer and Research Pavilion at Saint Joseph's/Candler Savannah Georgia 31405
Saint Alphonsus Cancer Care Center-Boise Boise Idaho 83706
Saint Luke's Cancer Institute - Boise Boise Idaho 83712
Saint Alphonsus Cancer Care Center-Caldwell Caldwell Idaho 83605
Kootenai Health - Coeur d'Alene Coeur d'Alene Idaho 83814
Saint Luke's Cancer Institute - Fruitland Fruitland Idaho 83619
Idaho Urologic Institute-Meridian Meridian Idaho 83642
Saint Luke's Cancer Institute - Meridian Meridian Idaho 83642
Saint Alphonsus Cancer Care Center-Nampa Nampa Idaho 83687
Saint Luke's Cancer Institute - Nampa Nampa Idaho 83687
Kootenai Clinic Cancer Services - Post Falls Post Falls Idaho 83854
Kootenai Clinic Cancer Services - Sandpoint Sandpoint Idaho 83864
Saint Luke's Cancer Institute - Twin Falls Twin Falls Idaho 83301
Rush-Copley Medical Center Aurora Illinois 60504
Northwestern University Chicago Illinois 60611
Rush MD Anderson Cancer Center Chicago Illinois 60612
University of Chicago Comprehensive Cancer Center Chicago Illinois 60637
Carle at The Riverfront Danville Illinois 61832
Carle Physician Group-Effingham Effingham Illinois 62401
Northwestern Medicine Lake Forest Hospital Lake Forest Illinois 60045
Carle Physician Group-Mattoon/Charleston Mattoon Illinois 61938
SSM Health Good Samaritan Mount Vernon Illinois 62864
UC Comprehensive Cancer Center at Silver Cross New Lenox Illinois 60451
University of Chicago Medicine-Orland Park Orland Park Illinois 60462
Carle Cancer Center Urbana Illinois 61801
The Carle Foundation Hospital Urbana Illinois 61801
Rush-Copley Healthcare Center Yorkville Illinois 60560
Indiana University/Melvin and Bren Simon Cancer Center Indianapolis Indiana 46202
Sidney and Lois Eskenazi Hospital Indianapolis Indiana 46202
Mercy Cancer Center-West Lakes Clive Iowa 50325
UI Health Care Mission Cancer and Blood - West Des Moines Clinic Clive Iowa 50325
Greater Regional Medical Center Creston Iowa 50801
Iowa Methodist Medical Center Des Moines Iowa 50309
UI Health Care Mission Cancer and Blood - Des Moines Clinic Des Moines Iowa 50309
Broadlawns Medical Center Des Moines Iowa 50314
Mercy Medical Center - Des Moines Des Moines Iowa 50314
UI Health Care Mission Cancer and Blood - Laurel Clinic Des Moines Iowa 50314
Iowa Lutheran Hospital Des Moines Iowa 50316
Methodist West Hospital West Des Moines Iowa 50266-7700
Mercy Medical Center-West Lakes West Des Moines Iowa 50266
Central Care Cancer Center - Garden City Garden City Kansas 67846
Central Care Cancer Center - Great Bend Great Bend Kansas 67530
University of Kansas Cancer Center Kansas City Kansas 66160
Lawrence Memorial Hospital Lawrence Kansas 66044
Kansas Institute of Medicine Cancer and Blood Center Lenexa Kansas 66219
Minimally Invasive Surgery Hospital Lenexa Kansas 66219
Menorah Medical Center Overland Park Kansas 66209
University of Kansas Cancer Center-Overland Park Overland Park Kansas 66210
Saint Luke's South Hospital Overland Park Kansas 66213
University of Kansas Hospital-Westwood Cancer Center Westwood Kansas 66205
Cancer Center of Kansas-Wichita Medical Arts Tower Wichita Kansas 67208
Ascension Via Christi Hospitals Wichita Wichita Kansas 67214
Cancer Center of Kansas - Wichita Wichita Kansas 67214
Saint Joseph Radiation Oncology Resource Center Lexington Kentucky 40504
Saint Joseph Hospital East Lexington Kentucky 40509
Jewish Hospital Louisville Kentucky 40202
UofL Health Medical Center Northeast Louisville Kentucky 40245
Ochsner Health Center-Summa Baton Rouge Louisiana 70809
Medical Center of Baton Rouge Baton Rouge Louisiana 70816
Ochsner High Grove Baton Rouge Louisiana 70836
Ochsner Medical Center Jefferson New Orleans Louisiana 70121
Bronson Battle Creek Battle Creek Michigan 49017
Corewell Health Grand Rapids Hospitals - Butterworth Hospital Grand Rapids Michigan 49503
Corewell Health Grand Rapids Hospitals - Helen DeVos Children's Hospital Grand Rapids Michigan 49503
Trinity Health Grand Rapids Hospital Grand Rapids Michigan 49503
Bronson Methodist Hospital Kalamazoo Michigan 49007
West Michigan Cancer Center Kalamazoo Michigan 49007
Beacon Kalamazoo Kalamazoo Michigan 49048
Trinity Health Muskegon Hospital Muskegon Michigan 49444
Corewell Health Lakeland Hospitals - Niles Hospital Niles Michigan 49120
Cancer and Hematology Centers of Western Michigan - Norton Shores Norton Shores Michigan 49444
Corewell Health Reed City Hospital Reed City Michigan 49677
Corewell Health Lakeland Hospitals - Marie Yeager Cancer Center Saint Joseph Michigan 49085
Corewell Health Lakeland Hospitals - Saint Joseph Hospital Saint Joseph Michigan 49085
Munson Medical Center Traverse City Michigan 49684
University of Michigan Health - West Wyoming Michigan 49519
Sanford Joe Lueken Cancer Center Bemidji Minnesota 56601
Fairview Ridges Hospital Burnsville Minnesota 55337
Mercy Hospital Coon Rapids Minnesota 55433
Fairview Southdale Hospital Edina Minnesota 55435
Unity Hospital Fridley Minnesota 55432
Fairview Clinics and Surgery Center Maple Grove Maple Grove Minnesota 55369
Minnesota Oncology Hematology PA-Maplewood Maplewood Minnesota 55109
Saint John's Hospital - Healtheast Maplewood Minnesota 55109
Abbott-Northwestern Hospital Minneapolis Minnesota 55407
Hennepin County Medical Center Minneapolis Minnesota 55415
Health Partners Inc Minneapolis Minnesota 55454
Monticello Cancer Center Monticello Minnesota 55362
North Memorial Medical Health Center Robbinsdale Minnesota 55422
Mayo Clinic in Rochester Rochester Minnesota 55905
Park Nicollet Clinic - Saint Louis Park Saint Louis Park Minnesota 55416
Regions Hospital Saint Paul Minnesota 55101
United Hospital Saint Paul Minnesota 55102
Saint Francis Regional Medical Center Shakopee Minnesota 55379
Lakeview Hospital Stillwater Minnesota 55082
Ridgeview Medical Center Waconia Minnesota 55387
Rice Memorial Hospital Willmar Minnesota 56201
Minnesota Oncology Hematology PA-Woodbury Woodbury Minnesota 55125
Mercy Oncology and Hematology - Clayton-Clarkson Ballwin Missouri 63011
Central Care Cancer Center - Bolivar Bolivar Missouri 65613
Siteman Cancer Center at Saint Peters Hospital City of Saint Peters Missouri 63376
Siteman Cancer Center at West County Hospital Creve Coeur Missouri 63141
Centerpoint Medical Center LLC Independence Missouri 64057
Freeman Health System Joplin Missouri 64804
Saint Luke's Hospital of Kansas City Kansas City Missouri 64111
Research Medical Center Kansas City Missouri 64132
Saint Luke's East - Lee's Summit Lee's Summit Missouri 64086
Mercy Clinic-Rolla-Cancer and Hematology Rolla Missouri 65401
Phelps Health Delbert Day Cancer Institute Rolla Missouri 65401
Heartland Regional Medical Center Saint Joseph Missouri 64506
Mercy Hospital Springfield Springfield Missouri 65804
CoxHealth South Hospital Springfield Missouri 65807
Washington University School of Medicine St Louis Missouri 63110
Mercy Hospital South St Louis Missouri 63128
Siteman Cancer Center-South County St Louis Missouri 63129
Mercy Hospital Saint Louis St Louis Missouri 63141
Community Hospital of Anaconda Anaconda Montana 59711
Billings Clinic Cancer Center Billings Montana 59101
Bozeman Health Deaconess Hospital Bozeman Montana 59715
Benefis Sletten Cancer Institute Great Falls Montana 59405
Great Falls Clinic Great Falls Montana 59405
Saint Peter's Community Hospital Helena Montana 59601
Logan Health Medical Center Kalispell Montana 59901
Community Medical Center Missoula Montana 59804
Nebraska Cancer Specialists/Oncology Hematology West PC Grand Island Nebraska 68803
CHI Health Good Samaritan Kearney Nebraska 68847
Alegent Health Immanuel Medical Center Omaha Nebraska 68122
Alegent Health Bergan Mercy Medical Center Omaha Nebraska 68124
Alegent Health Lakeside Hospital Omaha Nebraska 68130
Creighton University Medical Center Omaha Nebraska 68131
Comprehensive Cancer Centers of Nevada - Henderson Henderson Nevada 89052
OptumCare Cancer Care at Seven Hills Henderson Nevada 89052
Oncology Las Vegas - Henderson Henderson Nevada 89074
OptumCare Cancer Care at Charleston Las Vegas Nevada 89102
Radiation Oncology Centers of Nevada Central Las Vegas Nevada 89106
Radiation Oncology Centers of Nevada Southeast Las Vegas Nevada 89119
Comprehensive Cancer Centers of Nevada - Northwest Las Vegas Nevada 89128
OptumCare Cancer Care at MountainView Las Vegas Nevada 89128
Alliance for Childhood Diseases/Cure 4 the Kids Foundation Las Vegas Nevada 89135
Comprehensive Cancer Centers of Nevada-Summerlin Las Vegas Nevada 89144
Comprehensive Cancer Centers of Nevada Las Vegas Nevada 89148
OptumCare Cancer Care at Fort Apache Las Vegas Nevada 89148
Comprehensive Cancer Centers of Nevada - Central Valley Las Vegas Nevada 89169
Renown Regional Medical Center Reno Nevada 89502
Saint Mary's Regional Medical Center Reno Nevada 89503
Radiation Oncology Associates Reno Nevada 89509
Hackensack University Medical Center Hackensack New Jersey 07601
Duke University Medical Center Durham North Carolina 27710
Sanford Bismarck Medical Center Bismarck North Dakota 58501
Sanford Broadway Medical Center Fargo North Dakota 58122
Sanford Roger Maris Cancer Center Fargo North Dakota 58122
Strecker Cancer Center-Belpre Belpre Ohio 45714
Adena Regional Medical Center Chillicothe Ohio 45601
Good Samaritan Hospital - Cincinnati Cincinnati Ohio 45220
Bethesda North Hospital Cincinnati Ohio 45242
MetroHealth Medical Center Cleveland Ohio 44109
Mount Carmel East Hospital Columbus Ohio 43213
Columbus Oncology and Hematology Associates Inc Columbus Ohio 43214
Riverside Methodist Hospital Columbus Ohio 43214
Grant Medical Center Columbus Ohio 43215
The Mark H Zangmeister Center Columbus Ohio 43219
Mount Carmel Health Center West Columbus Ohio 43222
Doctors Hospital Columbus Ohio 43228
Delaware Health Center-Grady Cancer Center Delaware Ohio 43015
Delaware Radiation Oncology Delaware Ohio 43015
Grady Memorial Hospital Delaware Ohio 43015
Dublin Methodist Hospital Dublin Ohio 43016
Fairfield Medical Center Lancaster Ohio 43130
OhioHealth Mansfield Hospital Mansfield Ohio 44903
Marietta Memorial Hospital Marietta Ohio 45750
OhioHealth Marion General Hospital Marion Ohio 43302
Knox Community Hospital Mount Vernon Ohio 43050
Licking Memorial Hospital Newark Ohio 43055
Newark Radiation Oncology Newark Ohio 43055
Southern Ohio Medical Center Portsmouth Ohio 45662
Saint Ann's Hospital Westerville Ohio 43081
Genesis Healthcare System Cancer Care Center Zanesville Ohio 43701
University of Oklahoma Health Sciences Center Oklahoma City Oklahoma 73104
Mercy Hospital Oklahoma City Oklahoma City Oklahoma 73120
Saint Charles Health System Bend Oregon 97701
Clackamas Radiation Oncology Center Clackamas Oregon 97015
Bay Area Hospital Coos Bay Oregon 97420
Providence Newberg Medical Center Newberg Oregon 97132
Providence Portland Medical Center Portland Oregon 97213
Providence Saint Vincent Medical Center Portland Oregon 97225
Geisinger Medical Center Danville Pennsylvania 17822
Geisinger Medical Oncology-Lewisburg Lewisburg Pennsylvania 17837
Lewistown Hospital Lewistown Pennsylvania 17044
University of Pennsylvania/Abramson Cancer Center Philadelphia Pennsylvania 19104
Geisinger Wyoming Valley/Henry Cancer Center Wilkes-Barre Pennsylvania 18711
Medical University of South Carolina Charleston South Carolina 29425
Gibbs Cancer Center-Gaffney Gaffney South Carolina 29341
Gibbs Cancer Center-Pelham Greer South Carolina 29651
Spartanburg Medical Center Spartanburg South Carolina 29303
SMC Center for Hematology Oncology Union Union South Carolina 29379
Sanford Cancer Center Oncology Clinic Sioux Falls South Dakota 57104
Sanford USD Medical Center - Sioux Falls Sioux Falls South Dakota 57117-5134
Memorial Hospital Chattanooga Tennessee 37404
Saint Joseph Regional Cancer Center Bryan Texas 77802
VCU Massey Comprehensive Cancer Center Richmond Virginia 23298
Providence Regional Cancer System-Aberdeen Aberdeen Washington 98520
Overlake Medical Center Bellevue Washington 98004
PeaceHealth Saint Joseph Medical Center Bellingham Washington 98225
Highline Medical Center-Main Campus Burien Washington 98166
Providence Regional Cancer System-Centralia Centralia Washington 98531
Providence Regional Cancer Partnership Everett Washington 98201
Swedish Cancer Institute-Issaquah Issaquah Washington 98029
Kadlec Clinic Hematology and Oncology Kennewick Washington 99336
Providence Regional Cancer System-Lacey Lacey Washington 98503
PeaceHealth Saint John Medical Center Longview Washington 98632
Valley Medical Center Renton Washington 98055
Swedish Medical Center-Ballard Campus Seattle Washington 98107
Kaiser Permanente Washington Seattle Washington 98112
Swedish Medical Center-First Hill Seattle Washington 98122
PeaceHealth United General Medical Center Sedro-Woolley Washington 98284
Saint Michael Cancer Center Silverdale Washington 98383
Northwest Medical Specialties PLLC Tacoma Washington 98405
PeaceHealth Southwest Medical Center Vancouver Washington 98664
Providence Saint Mary Regional Cancer Center Walla Walla Washington 99362
Marshfield Medical Center-EC Cancer Center Eau Claire Wisconsin 54701
Marshfield Medical Center-Marshfield Marshfield Wisconsin 54449
Marshfield Medical Center - Minocqua Minocqua Wisconsin 54548
Cancer Center of Western Wisconsin New Richmond Wisconsin 54017
Marshfield Medical Center-Rice Lake Rice Lake Wisconsin 54868
Marshfield Medical Center-River Region at Stevens Point Stevens Point Wisconsin 54482
Marshfield Clinic-Wausau Center Wausau Wisconsin 54401
Marshfield Medical Center - Weston Weston Wisconsin 54476
Billings Clinic-Cody Cody Wyoming 82414

Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.

About this trial record page

What this page shows
Public field values for ClinicalTrials.gov record NCT03304639, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
What this page does not do
No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
Where the data comes from
Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
Last refresh
Last update posted Apr 12, 2026 · Synced May 8, 2026

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Open the official record

The complete protocol, eligibility criteria, and contact information for NCT03304639 live on ClinicalTrials.gov.

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